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TWI579867B - A dust core, a method for manufacturing the dust core, an electronic / electrical component provided with the dust core, and an electronic / electrical device to which the electronic / electrical component is mounted - Google Patents

A dust core, a method for manufacturing the dust core, an electronic / electrical component provided with the dust core, and an electronic / electrical device to which the electronic / electrical component is mounted Download PDF

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TWI579867B
TWI579867B TW104118303A TW104118303A TWI579867B TW I579867 B TWI579867 B TW I579867B TW 104118303 A TW104118303 A TW 104118303A TW 104118303 A TW104118303 A TW 104118303A TW I579867 B TWI579867 B TW I579867B
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powder
magnetic material
core
dust core
electronic
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TW104118303A
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TW201603061A (en
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Ryo Nakabayashi
Toshio Takahashi
Keiichiro Sato
Akinori Kojima
Takao Mizushima
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Alps Electric Co Ltd
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  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
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Description

壓粉鐵芯、該壓粉鐵芯之製造方法、具備該壓粉鐵芯之電子/電氣元件、及安裝有該電子/電氣元件之電子/電氣機器 Powder iron core, method for manufacturing the powder core, electronic/electrical component having the powder core, and electronic/electrical device with the electronic/electric component mounted thereon

本發明關於壓粉鐵芯、該壓粉鐵芯之製造方法、具備該壓粉鐵芯之電子/電氣元件、及安裝有該電子/電氣元件之電子/電氣機器。 The present invention relates to a dust core, a method of manufacturing the powder core, an electronic/electrical component including the powder core, and an electronic/electrical device in which the electronic/electric component is mounted.

油電混合動力車等之升壓電路或發電、變電設備使用的電抗器,變壓器或扼流圈等使用的壓粉鐵芯,係將多數之軟磁性粉末壓粉成形,對獲得的成形體實施熱處理而可以獲得。下述專利文獻1揭示壓粉鐵芯之一例。 A booster circuit such as a hybrid electric vehicle, a reactor for power generation and a substation, a dust core for use in a transformer or a choke coil, and a plurality of soft magnetic powders are formed by powder molding, and the obtained molded body is obtained. It can be obtained by performing heat treatment. Patent Document 1 listed below discloses an example of a dust core.

又,專利文獻1揭示具備磁心(壓粉鐵芯)的電感器,係較習知具有更高的鐵芯強度及絕緣電阻,而且鐵芯損失少的電感器,該磁心包含混合粉末與絕緣性材料之混合物固化而成者,該混合粉末係由90~98mass%之非晶質軟磁性粉末與2~10mass%之結晶質軟磁性粉末之配合比構成的混合粉末。 Further, Patent Document 1 discloses an inductor including a core (powder core), which is an inductor having a higher core strength and insulation resistance and having less core loss, the core including mixed powder and insulation. When the mixture of materials is cured, the mixed powder is a mixed powder composed of a mixing ratio of 90 to 98 mass% of amorphous soft magnetic powder and 2 to 10 mass% of crystalline soft magnetic powder.

[先行技術文獻] [Advanced technical literature] [專利文獻] [Patent Literature]

[專利文獻1]特開2010-118486號公報 [Patent Document 1] JP-A-2010-118486

最近,使用壓粉鐵芯的電感器等之電子/電氣元件要求能適應動作頻率之高頻化。但是,專利文獻1中,針對使用磁心(壓粉鐵芯)的環形鐵芯之鐵芯損失進行評估時之激磁條件僅止於300kHz,在1MHz以上之高頻帶中,含有結晶質軟磁性粉末及非晶質軟磁性粉末的材料是否適合作為磁心(壓粉鐵芯)之材料則完全未論及。 Recently, electronic/electrical components such as inductors using a powdered iron core are required to be able to adapt to high frequency of operating frequency. However, in Patent Document 1, the excitation condition for evaluating the core loss of the toroidal core using the core (powder core) is only 300 kHz, and the crystalline soft magnetic powder is contained in the high frequency band of 1 MHz or more. Whether or not the material of the amorphous soft magnetic powder is suitable as the material of the core (powder core) is not mentioned at all.

本發明目的在於提供含有結晶質磁性材料之粉末及非晶質磁性材料之粉末的壓粉鐵芯,即使在1MHz以上之高頻帶亦具備良好磁氣特性的壓粉鐵芯。本發明課題亦在於提供該壓粉鐵芯之製造方法、具備該壓粉鐵芯的電子/電氣元件及安裝有該電子/電氣元件的電子/電氣機器。 An object of the present invention is to provide a dust core having a powder of a crystalline magnetic material and a powder of an amorphous magnetic material, and a dust core having good magnetic characteristics even in a high frequency band of 1 MHz or more. An object of the present invention is to provide a method for producing the powdered iron core, an electronic/electrical component including the powdered iron core, and an electronic/electrical device to which the electronic/electrical component is mounted.

為解決上述課題,本發明人檢討之結果發現,在有效最大磁通密度Bm為15mT之條件下測定的供作為表現鐵損Pcv(單位:kW/m3)對頻率f(單位:kHz)依存性之式中,將該式所使用的2個常數之範圍設 為特定範圍,如此而可以提供即使在1MHz以上之高頻帶亦具備良好磁氣特性的壓粉鐵芯。 In order to solve the above problems, the inventors have found that the measured iron loss Pcv (unit: kW/m 3 ) versus frequency f (unit: kHz) measured under the condition that the effective maximum magnetic flux density B m is 15 mT. In the formula of the dependency, the range of the two constants used in the equation is set to a specific range, and thus it is possible to provide a dust core having good magnetic characteristics even in a high frequency band of 1 MHz or more.

依據該發現而完成的發明如下。 The invention completed in accordance with this finding is as follows.

本發明之一態樣之壓粉鐵芯,係含有結晶質磁性材料之粉末及非晶質磁性材料之粉末的壓粉鐵芯,在有效最大磁通密度Bm為15mT之條件下測定的鐵損Pcv(單位:kW/m3)對頻率f(單位:kHz)依存性,使用2個常數kh及ke而以下述式(1)表示時,Pcv=kh×f×Bm 1.6+ke×f2×Bm 2 (1)。 The dust core of one aspect of the present invention is a powdered iron core containing a powder of a crystalline magnetic material and a powder of an amorphous magnetic material, and the iron is determined under the condition of an effective maximum magnetic flux density B m of 15 mT. The dependence of the loss Pcv (unit: kW/m 3 ) on the frequency f (unit: kHz) is expressed by the following formula (1) using two constants k h and k e , Pcv = k h × f × B m 1.6 +k e ×f 2 ×B m 2 (1).

上述常數kh為1.5×10-3kW/m3/kHz/(mT)1.6以下,而且上述常數ke為3.0×10-7kW/m3/(kHz)2/(mT)2以下。 The constant k h is 1.5 × 10 -3 kW / m 3 / kHz / (mT) 1.6 or less, and the constant k e is 3.0 × 10 -7 kW / m 3 / (kHz) 2 / (mT) 2 or less.

藉由設定常數kh、ke成為上述範圍內,可使頻率f之上升伴隨的壓粉鐵芯之鐵損Pcv之上升程度平穩。因此,即使成為1MHz以上之高頻,壓粉鐵芯之鐵損Pcv亦不容易變大。 By setting the constants k h and k e to be within the above range, the degree of increase in the iron loss Pcv of the dust core due to the increase in the frequency f can be made smooth. Therefore, even if it is a high frequency of 1 MHz or more, the iron loss Pcv of the dust core is not easily increased.

較好是,相對於上述結晶質磁性材料之粉末之含有量與上述非晶質磁性材料之粉末之含有量之總和,上述結晶質磁性材料之粉末之含有量之質量比率在5質量%以上40質量%以下。藉由該質量比率設於上述範圍內,可以更穩定地實現壓粉鐵芯之絕緣電阻之提升或低頻帶之鐵損Pcv之減低。 Preferably, the mass ratio of the content of the powder of the crystalline magnetic material is 5% by mass or more based on the total of the content of the powder of the crystalline magnetic material and the content of the powder of the amorphous magnetic material. Below mass%. By setting the mass ratio within the above range, it is possible to more stably achieve an increase in the insulation resistance of the dust core or a decrease in the iron loss Pcv in the low frequency band.

本發明另一態樣之壓粉鐵芯,係含有結晶質磁性材料之粉末及非晶質磁性材料之粉末的壓粉鐵芯,其特徵為:相對於上述結晶質磁性材料之粉末之含有量與上 述非晶質磁性材料之粉末之含有量之總和,上述結晶質磁性材料之粉末之含有量之質量比率在5質量%以上40質量%以下。藉由該質量比率設於上述範圍內,可以更穩定地實現壓粉鐵芯之鐵損Pcv之減低。 A powdered iron core according to another aspect of the present invention is a powdered iron core comprising a powder of a crystalline magnetic material and a powder of an amorphous magnetic material, characterized in that the content of the powder relative to the crystalline magnetic material is With The sum of the contents of the powder of the amorphous magnetic material is 5% by mass or more and 40% by mass or less based on the mass ratio of the powder of the crystalline magnetic material. By setting the mass ratio within the above range, the reduction of the iron loss Pcv of the dust core can be more stably achieved.

上述結晶質磁性材料可以包含:由Fe-Si-Cr系合金、Fe-Ni系合金、Fe-Co系合金、Fe-V系合金、Fe-Al系合金、Fe-Si系合金、Fe-Si-Al系合金、羰基鐵及純鐵構成的群選出的1種或2種以上之材料。 The crystalline magnetic material may include Fe-Si-Cr alloy, Fe-Ni alloy, Fe-Co alloy, Fe-V alloy, Fe-Al alloy, Fe-Si alloy, Fe-Si. One or two or more selected materials selected from the group consisting of an Al-based alloy, a carbonyl iron, and a pure iron.

較好是,上述結晶質磁性材料由羰基鐵構成。 Preferably, the crystalline magnetic material is composed of carbonyl iron.

上述非晶質磁性材料可以包含:由Fe-Si-B系合金、Fe-P-C系合金及Co-Fe-Si-B系合金構成的群選出的1種或2種以上之材料。 The amorphous magnetic material may include one or two or more selected from the group consisting of Fe-Si-B alloys, Fe-P-C alloys, and Co-Fe-Si-B alloys.

較好是,上述非晶質磁性材料由Fe-P-C系合金構成。 Preferably, the amorphous magnetic material is composed of an Fe-P-C alloy.

較好是,上述結晶質磁性材料之粉末由施予絕緣處理的材料構成。藉由設於上述範圍內,可以更穩定地實現壓粉鐵芯之絕緣電阻之提升或低頻帶之鐵損Pcv之減低。 Preferably, the powder of the above crystalline magnetic material is composed of a material to which an insulating treatment is applied. By being set in the above range, it is possible to more stably achieve an increase in the insulation resistance of the dust core or a decrease in the iron loss Pcv in the low frequency band.

有可能較好是,上述非晶質磁性材料之粉末之中值粒徑(median size)D50在6μm以下。藉由設定該中值粒徑D50成為6μm以下,可以容易減低常數ke。有可能較好是,上述非晶質磁性材料之粉末之中值粒徑D50在5μm以下。藉由設定該中值粒徑D50成為5μm以下, 容易減低高頻帶之鐵損Pcv,容易提升直流重疊特性。 It is preferable that the amorphous magnetic material has a median size D50 of 6 μm or less. By setting the median diameter D50 to 6 μm or less, the constant k e can be easily reduced. It is preferable that the amorphous magnetic material has a powder median diameter D50 of 5 μm or less. By setting the median diameter D50 to 5 μm or less, it is easy to reduce the iron loss Pcv in the high frequency band, and it is easy to improve the DC superposition characteristics.

上述壓粉鐵芯可以含有黏結成分,該黏結成分使上述結晶質磁性材料之粉末及上述非晶質磁性材料之粉末,黏結於包含於上述壓粉鐵芯的其他材料。 The dust core may contain a binder component that bonds the powder of the crystalline magnetic material and the powder of the amorphous magnetic material to other materials included in the dust core.

較好是,上述黏結成分包含以樹脂材料為基礎的成分。 Preferably, the above-mentioned binder component contains a component based on a resin material.

本發明另一態樣,係上述壓粉鐵芯之製造方法,其特徵為:具備藉由包含混合物之加壓成形的成形處理來獲得成形製造物的成形工程,該混合物包含上述結晶質磁性材料之粉末及上述非晶質磁性材料之粉末以及由上述樹脂材料構成的黏結劑成分。藉由該製造方法可以實現更有效率地製造上述壓粉鐵芯。 According to another aspect of the invention, there is provided a method of producing a dust core according to the invention, comprising: a molding process for obtaining a molded article by a press forming process comprising a mixture comprising a mixture of the crystalline magnetic material; a powder and a powder of the amorphous magnetic material and a binder component composed of the resin material. The above-described powdered iron core can be more efficiently produced by this manufacturing method.

上述製造方法可以是,藉由上述成形工程獲得的上述成形製造物為上述壓粉鐵芯。或是,具備:熱處理工程,係藉由熱處理對藉由上述成形工程獲得的上述成形製造物進行加熱來獲得上述壓粉鐵芯。 In the above manufacturing method, the above-mentioned molded article obtained by the above-described forming process may be the above-mentioned dust core. Alternatively, the heat treatment process is performed by heating the above-described molded article obtained by the above-described forming process by heat treatment to obtain the dust core.

本發明再另一態樣之電子/電氣元件,係具備上述壓粉鐵芯、線圈及連接於上述線圈之各個端部的連接端子者,上述壓粉鐵芯之至少一部分係以位於感應磁場內的方式被配置,該感應磁場係通過上述連接端子使電流流入上述線圈時上述電流所產生者。該電子/電氣元件為電感零件時,依據上述壓粉鐵芯之良好特性,可以兼顧高頻化、良好的直流重疊特性及低損失。 According to still another aspect of the present invention, the electronic/electrical component includes the dust core, the coil, and a connection terminal connected to each end of the coil, and at least a portion of the dust core is located in an induced magnetic field. The method is such that the induced magnetic field is generated by the current when the current flows into the coil through the connection terminal. When the electronic/electrical component is an inductive component, it is possible to achieve both high frequency, good DC superposition characteristics, and low loss in accordance with the excellent characteristics of the dust core.

本發明再另一態樣之電子/電氣機器,係安裝 有上述電子/電氣元件的電子/電氣機器,上述電子/電氣元件經由上述連接端子連接於基板。該電子/電氣機器之例,可為具備電源開關電路、電壓昇降電路、平滑電路等之電源裝置或小型行動通信機器等。本發明之電子/電氣機器具有上述電子/電氣元件,因此容易對應小型化.高速化。 Another aspect of the present invention is an electronic/electrical machine that is installed An electronic/electrical device having the above electronic/electrical component, wherein the electronic/electrical component is connected to the substrate via the connection terminal. An example of the electronic/electrical device may be a power supply device including a power switch circuit, a voltage step-up circuit, a smoothing circuit, or a small mobile communication device. The electronic/electrical machine of the present invention has the above-mentioned electronic/electrical components, and thus is easy to cope with miniaturization. High speed.

上述發明之壓粉鐵芯,即使在1MHz以上之高頻帶亦具良好磁氣特性。又,依據本發明,可以提供上述壓粉鐵芯之製造方法、具備上述壓粉鐵芯的電子/電氣元件及安裝有該電子/電氣元件的電子/電氣機器。 The dust core of the above invention has good magnetic characteristics even in a high frequency band of 1 MHz or more. Moreover, according to the present invention, it is possible to provide the method for producing the dust core, the electronic/electrical component including the dust core, and the electronic/electrical device to which the electronic/electric component is mounted.

1‧‧‧壓粉鐵芯(環形鐵芯) 1‧‧‧Powder core (ring core)

10‧‧‧環形線圈 10‧‧‧Circular coil

2‧‧‧被覆導電線 2‧‧‧covered conductive wire

2a‧‧‧線圈 2a‧‧‧ coil

2b、2c‧‧‧被覆導電線2之端部 2b, 2c‧‧‧ covered end of conductive wire 2

2d、2e‧‧‧線圈2a之端部 2d, 2e‧‧‧ end of coil 2a

20‧‧‧電感零件 20‧‧‧Inductive parts

3‧‧‧壓粉鐵芯 3‧‧‧Powder core

3a‧‧‧壓粉鐵芯3之安裝面 3a‧‧‧Installation surface of powder core 3

3b、3c‧‧‧壓粉鐵芯3之側面 3b, 3c‧‧‧ side of the powder core 3

4‧‧‧端子部 4‧‧‧ Terminals

5‧‧‧空芯線圈 5‧‧‧Air core coil

5a‧‧‧空芯線圈5之卷繞部 5a‧‧‧Winding section of air core coil 5

5b‧‧‧空芯線圈5之引出端部 5b‧‧‧End of the air core coil 5

30‧‧‧收納凹部 30‧‧‧ Storage recess

40‧‧‧連接端部 40‧‧‧Connecting end

42a‧‧‧第1彎曲部 42a‧‧‧1st bend

42b‧‧‧第2彎曲部 42b‧‧‧2nd bend

100‧‧‧安裝基板 100‧‧‧Installation substrate

110‧‧‧島部 110‧‧‧ Island Department

120‧‧‧焊錫層 120‧‧‧ solder layer

200‧‧‧噴霧乾燥器裝置 200‧‧‧ spray dryer unit

201‧‧‧旋轉子 201‧‧‧ Rotator

S‧‧‧漿 S‧‧·Pulp

P‧‧‧造粒粉 P‧‧‧Powder powder

[圖1]本發明一實施形態之壓粉鐵芯之形狀的概念斜視圖。 Fig. 1 is a conceptual perspective view showing the shape of a dust core according to an embodiment of the present invention.

[圖2]製造造粒粉的方法之一例中使用的噴霧乾燥器裝置及其動作的概念圖。 Fig. 2 is a conceptual diagram of a spray dryer device used in an example of a method for producing a granulated powder and an operation thereof.

[圖3]具備本發明一實施形態之壓粉鐵芯的電子/電氣元件即環形鐵芯之形狀的概念斜視圖。 Fig. 3 is a conceptual perspective view showing the shape of a toroidal core, which is an electronic/electrical component of a dust core according to an embodiment of the present invention.

[圖4]具備本發明另一實施形態之壓粉鐵芯的電子/電氣元件即電感零件之全體構成的一部分透視之斜視圖。 Fig. 4 is a partially perspective perspective view showing the overall configuration of an inductance component including an electronic/electrical component of a dust core according to another embodiment of the present invention.

[圖5]將圖4所示電感零件安裝於安裝基板上的狀態 之部分正面圖。 [Fig. 5] A state in which the inductance component shown in Fig. 4 is mounted on a mounting substrate Part of the front view.

[圖6]實施例中鐵損Pcv之頻率依存性之測定結果之曲線圖。 Fig. 6 is a graph showing the results of measurement of the frequency dependence of the iron loss Pcv in the examples.

[圖7]表示常數kh對第一混合比率的依存性之曲線圖。 Fig. 7 is a graph showing the dependence of the constant k h on the first mixing ratio.

[圖8]表示常數ke對第一混合比率的依存性之曲線圖。 Fig. 8 is a graph showing the dependence of the constant k e on the first mixing ratio.

[圖9]100kHz及2MHz中鐵損變化率對第一混合比率的依存性之曲線圖。 [Fig. 9] A graph showing the dependence of the rate of change of iron loss on the first mixing ratio in 100 kHz and 2 MHz.

[圖10]依據表2及4,絕緣電阻對第一混合比率的依存性之曲線圖。 [Fig. 10] A graph showing the dependence of the insulation resistance on the first mixing ratio according to Tables 2 and 4.

[圖11]頻率為100kHz時鐵損Pcv對第一混合比率的依存性之曲線圖。 [Fig. 11] A graph of the dependence of the iron loss Pcv on the first mixing ratio at a frequency of 100 kHz.

[圖12]頻率為1MHz時鐵損Pcv對第一混合比率的依存性之曲線圖。 [Fig. 12] A graph showing the dependence of the iron loss Pcv on the first mixing ratio at a frequency of 1 MHz.

[圖13]頻率為2MHz時鐵損Pcv對第一混合比率的依存性之曲線圖。 [Fig. 13] A graph showing the dependence of the iron loss Pcv on the first mixing ratio at a frequency of 2 MHz.

[圖14]頻率為3MHz時鐵損Pcv對第一混合比率的依存性之曲線圖。 [Fig. 14] A graph showing the dependence of the iron loss Pcv on the first mixing ratio at a frequency of 3 MHz.

[圖15]重疊電流施加前(初期)電感L之變化量△L相對於電感L之值L0的比例(△L/L0)成為30%時之施加電流值(Isat)對第一混合比率的依存性之曲線圖。 The applied current value (Isat) mixing the first time before [15] superimposed current is applied (initial) of the amount of change △ L inductance L L of the ratio of the value of the inductance L 0 (△ L / L 0) becomes 30% A graph of the dependence of the ratio.

以下詳細說明本發明實施形態。 Hereinafter, embodiments of the present invention will be described in detail.

1.壓粉鐵芯 Powder core

圖1所示本發明一實施形態之壓粉鐵芯1,其外觀為環狀,含有結晶質磁性材料之粉末及非晶質磁性材料之粉末。本實施形態之壓粉鐵芯1係藉由具備成形處理的製造方法製造,該成形處理係包含對包含彼等粉末的混合物實施加壓成形者。作為非限定之一例,本實施形態之壓粉鐵芯1含有黏結成分,該黏結成分使結晶質磁性材料之粉末及非晶質磁性材料之粉末,黏結於包含於壓粉鐵芯1的其他材料(可為同種之材料,或異種之材料)。以下,針對彼等成分進行說明。 Fig. 1 shows a dust core 1 according to an embodiment of the present invention, which has a ring shape and contains a powder of a crystalline magnetic material and a powder of an amorphous magnetic material. The dust core 1 of the present embodiment is produced by a production method including a molding process including a press molding of a mixture containing the powders. In a non-limiting example, the dust core 1 of the present embodiment includes a binder component that bonds the powder of the crystalline magnetic material and the powder of the amorphous magnetic material to other materials contained in the dust core 1 (Can be the same material, or a different material). Hereinafter, the components will be described.

(1)結晶質磁性材料之粉末 (1) Powder of crystalline magnetic material

用於提供本發明一實施形態之壓粉鐵芯1所含有結晶質磁性材料之粉末的結晶質磁性材料,只要滿足結晶質(藉由通常之X線繞射測定可以獲得在能界定材料種類之程度下具有明確峰值的繞射光譜),及強磁性體,則具體的種類無需限定。結晶質磁性材料之具體例,例如可為Fe-Si-Cr系合金、Fe-Ni系合金、Fe-Co系合金、Fe-V系合金、Fe-Al系合金、Fe-Si系合金、Fe-Si-Al系合金、羰基鐵及純鐵。上述結晶質磁性材料可由1種類之材料構成或由複數種類之材料構成。提供結晶質磁性材料之粉末的結晶質磁性材料,較好是由上述材料構成的群選出的1種 或2種以上之材料,彼等之中,較好是含有羰基鐵,由羰基鐵構成的更好。 A crystalline magnetic material for providing a powder of a crystalline magnetic material contained in the dust core 1 according to the embodiment of the present invention, as long as the crystal quality is satisfied (by the usual X-ray diffraction measurement, the type of material can be defined. The diffraction spectrum with a clear peak to the extent, and the ferromagnetic body, the specific kind is not limited. Specific examples of the crystalline magnetic material include Fe-Si-Cr alloy, Fe-Ni alloy, Fe-Co alloy, Fe-V alloy, Fe-Al alloy, Fe-Si alloy, and Fe. -Si-Al alloy, carbonyl iron and pure iron. The above crystalline magnetic material may be composed of one type of material or a plurality of types of materials. A crystalline magnetic material which provides a powder of a crystalline magnetic material, preferably one selected from the group consisting of the above materials Two or more kinds of materials, among them, preferably contain carbonyl iron and are preferably composed of carbonyl iron.

本發明一實施形態之壓粉鐵芯1所含有的結晶質磁性材料之粉末之形狀不限定。粉末之形狀可為球狀或非球狀。非球狀時可為鱗片狀、橢圓球狀、液滴狀、針狀等具有形狀異方性的形狀,亦可為不具有特別之形狀異方性的不定形。不定形之粉體之例,可為球狀之粉體複數個互相相接結合,或一部分埋設於其他粉體而結合之情況。此種不定形之粉體於羰基鐵中容易觀察。 The shape of the powder of the crystalline magnetic material contained in the dust core 1 according to the embodiment of the present invention is not limited. The shape of the powder may be spherical or non-spherical. In the case of a non-spherical shape, it may have a shape having an anisotropy such as a scaly shape, an elliptical shape, a droplet shape, or a needle shape, or may be an amorphous shape having no special shape anisotropy. In the case of an amorphous powder, a plurality of spherical powders may be bonded to each other or partially embedded in other powders. Such an amorphous powder is easily observed in carbonyl iron.

粉末之形狀可為製造粉末的階段獲得的形狀,亦可為對製造的粉末實施二次加工而獲得的形狀。前者之形狀例如有球狀、橢圓球狀、液滴狀、針狀等,後者之形狀例如有鱗片狀。 The shape of the powder may be a shape obtained at the stage of producing the powder, or may be a shape obtained by subjecting the produced powder to secondary processing. The shape of the former is, for example, a spherical shape, an elliptical shape, a droplet shape, a needle shape, or the like, and the shape of the latter is, for example, a scale.

本發明一實施形態之壓粉鐵芯1所含有結晶質磁性材料之粉末之粒徑不限定。該粒徑藉由中值粒徑D50(以雷射繞射散射法測定的軟磁性粉末之粒徑之體積分布中體積累積值為50%時之粒徑)界定時,通常設為1μm至20μm之範圍。就提高處理性之觀点,就提高壓粉鐵芯中結晶質磁性材料之粉末之填充密度之觀點等而言,結晶質磁性材料之粉末之中值粒徑D50(本說明書中亦稱為「第一中值粒徑d1」),較好是設為1μm以上15μm以下,更好是設為1μm以上10μm以下,特別好是設為1μm以上5μm以下。 The particle size of the powder of the crystalline magnetic material contained in the dust core 1 according to the embodiment of the present invention is not limited. The particle diameter is defined by a median diameter D50 (particle diameter when the volume cumulative value of the particle diameter of the soft magnetic powder measured by the laser diffraction scattering method is 50%), and is usually set to 1 μm to 20 μm. The scope. From the viewpoint of improving the handling property, the powder of the crystalline magnetic material has a median diameter D50 (also referred to as "in this specification" in terms of improving the packing density of the powder of the crystalline magnetic material in the dust core. The first median diameter d1") is preferably 1 μm or more and 15 μm or less, more preferably 1 μm or more and 10 μm or less, and particularly preferably 1 μm or more and 5 μm or less.

本發明一實施形態之壓粉鐵芯1中結晶質磁 性材料之粉末的含有量,係依據和壓粉鐵芯1中非晶質磁性材料的含有量間之關係來設定,以使壓粉鐵芯1滿足後述之鐵損Pcv相關條件。 Crystalline magnetic in the dust core 1 of one embodiment of the present invention The content of the powder of the material is set in accordance with the relationship between the content of the amorphous magnetic material in the dust core 1 so that the dust core 1 satisfies the condition of the iron loss Pcv described later.

較好是由結晶質磁性材料之粉末之至少一部分被施予絕緣處理的材料構成,更好是由結晶質磁性材料之粉末施予絕緣處理的材料構成。結晶質磁性材料之粉末被施予絕緣處理時,有助於壓粉鐵芯之絕緣電阻之提升。又,不僅高頻帶,在低頻帶亦有可能發生鐵損Pcv減低之傾向。 It is preferably composed of a material in which at least a part of the powder of the crystalline magnetic material is subjected to insulation treatment, and more preferably a material which is subjected to insulation treatment by powder of the crystalline magnetic material. When the powder of the crystalline magnetic material is applied to the insulation treatment, it contributes to the improvement of the insulation resistance of the powder core. Further, not only the high frequency band but also the low frequency band tends to reduce the iron loss Pcv.

對結晶質磁性材料之粉末實施絕緣處理之種類不限定。例如可為磷酸處理、磷酸鹽處理、氧化處理等。 The type of the insulating treatment of the powder of the crystalline magnetic material is not limited. For example, it may be a phosphoric acid treatment, a phosphate treatment, an oxidation treatment, or the like.

結晶質磁性材料之粉末由施予絕緣處理的材料構成時,相對於結晶質磁性材料之粉末的含有量與非晶質磁性材料之粉末的含有量之總和,結晶質磁性材料之粉末的含有量之質量比率(單位:質量%,本說明書中亦稱為「第一混合比率」),較好是設為5質量%以上40質量%以下。藉由第一混合比率位於上述範圍內,則於高頻帶及低頻帶中鐵損Pcv有容易減低之傾向。第一混合比率更好是設為5質量%以上35質量%以下,在更好是設為5質量%以上30質量%以下,特別好是設為5質量%以上25質量%以下,極好是設為10質量%以上20質量%以下。 When the powder of the crystalline magnetic material is composed of a material subjected to the insulating treatment, the content of the powder of the crystalline magnetic material is the sum of the content of the powder of the crystalline magnetic material and the content of the powder of the amorphous magnetic material. The mass ratio (unit: mass%, also referred to as "first mixing ratio" in the present specification) is preferably 5% by mass or more and 40% by mass or less. When the first mixing ratio is within the above range, the iron loss Pcv tends to be lowered in the high frequency band and the low frequency band. The first mixing ratio is more preferably 5% by mass or more and 35% by mass or less, and more preferably 5% by mass or more and 30% by mass or less, and particularly preferably 5% by mass or more and 25% by mass or less. It is set to 10% by mass or more and 20% by mass or less.

(2)非晶質磁性材料之粉末 (2) Powder of amorphous magnetic material

用於提供本發明一實施形態之壓粉鐵芯1所含有非晶質磁性材料之粉末的非晶質磁性材料,只要滿足非晶質(藉由一般的X線繞射測定,可以獲得在能界定材料種類之程度下具有明確峰值的繞射光譜)及強磁性體、特別是軟磁性體即可,具體的種類不限定。非晶質磁性材料之具體例,例如可為Fe-Si-B系合金、Fe-P-C系合金及Co-Fe-Si-B系合金。上述非晶質磁性材料可由1種類之材料構成,或由複數種類之材料構成。構成非晶質磁性材料之粉末的磁性材料,較好是由上述材料構成的群選出的1種或2種以上之材料,彼等之中含有Fe-P-C系合金較好,由Fe-P-C系合金構成則更好。 An amorphous magnetic material for providing a powder of an amorphous magnetic material contained in the dust core 1 according to the embodiment of the present invention is provided as long as it satisfies amorphous (determined by general X-ray diffraction) The diffraction spectrum having a clear peak to the extent of the material type and the ferromagnetic body, particularly the soft magnetic material, may be used, and the specific type is not limited. Specific examples of the amorphous magnetic material include Fe-Si-B alloy, Fe-P-C alloy, and Co-Fe-Si-B alloy. The amorphous magnetic material may be composed of one type of material or a plurality of types of materials. The magnetic material constituting the powder of the amorphous magnetic material is preferably one or more selected from the group consisting of the above materials, and among them, a Fe-PC-based alloy is preferable, and the Fe-PC system is preferable. The alloy composition is even better.

Fe-P-C系合金之具體例,其組成式例如可以Fe100-a-b-c-x-y-z-tNiaSnbCrcPxCyBzSit表示,0原子%≦a≦10原子%,0原子%≦b≦3原子%,0原子%≦c≦6原子%,6.8原子%≦x≦10.8原子%,2.2原子%≦y≦9.8原子%,0原子%≦z≦4.2原子%,0原子%≦t≦7原子%之Fe基非晶質合金。上述組成式中Ni、Sn、Cr、B及Si為任意添加元素。 A specific example of the Fe-PC-based alloy, which has a composition formula of, for example, Fe 100-abcxyzt Ni a Sn b Cr c P x C y B z Si t , 0 atom% ≦a ≦ 10 atom%, 0 atom% ≦b≦ 3 atom%, 0 atom% ≦c≦6 atom%, 6.8 atom% ≦x≦10.8 atom%, 2.2 atom% ≦y≦9.8 atom%, 0 atom% ≦z≦4.2 atom%, 0 atom%≦t≦ 7 atom% Fe-based amorphous alloy. In the above composition formula, Ni, Sn, Cr, B, and Si are arbitrary added elements.

Ni之添加量a,較好是設為0原子%以上6原子%以下,更好是設為0原子%以上4原子%以下。Sn之添加量b,較好是設為0原子%以上2原子%以下,更好是設為1原子%以上2原子%以下。Cr之添加量c,較好是設為0原子%以上2原子%以下,更好是設為1原子%以上2原子%以下。P之添加量x,亦有可能設為8.8原子 %以上時較好。C之添加量y,亦有可能設為5.8原子%以上8.8原子%以下時較好。B之添加量z,較好是設為0原子%以上3原子%以下,更好是設為0原子%以上2原子%以下。Si之添加量t,較好是設為0原子%以上6原子%以下,更好是設為0原子%以上2原子%以下。 The addition amount a of Ni is preferably 0 atom% or more and 6 atom% or less, more preferably 0 atom% or more and 4 atom% or less. The addition amount b of Sn is preferably 0 atom% or more and 2 atom% or less, more preferably 1 atom% or more and 2 atom% or less. The addition amount c of Cr is preferably 0 atom% or more and 2 atom% or less, more preferably 1 atom% or more and 2 atom% or less. The addition amount of P is also possible to be set to 8.8 atoms. More than % is better. It is also preferable that the amount of addition y of C is 5.8 atom% or more and 8.8 atom% or less. The addition amount z of B is preferably 0 atom% or more and 3 atom% or less, more preferably 0 atom% or more and 2 atom% or less. The addition amount t of Si is preferably 0 atom% or more and 6 atom% or less, more preferably 0 atom% or more and 2 atom% or less.

本發明一實施形態之壓粉鐵芯1含有的非晶質磁性材料之粉末之形狀不限定。粉末之形狀之種類係和結晶質磁性材料之粉末時同樣因此省略說明。製造方法之關係上非晶質磁性材料較容易設為球狀或橢圓球狀之情況存在。又,一般而言非晶質磁性材料較結晶質磁性材料硬質,因此將結晶質磁性材料設為非球狀而加壓成形時容易變形,而有可能較好。 The shape of the powder of the amorphous magnetic material contained in the dust core 1 according to the embodiment of the present invention is not limited. The type of the shape of the powder is the same as that of the powder of the crystalline magnetic material, and thus the description thereof will be omitted. In the relationship of the manufacturing method, the amorphous magnetic material is more likely to be in the form of a spherical shape or an ellipsoidal shape. Further, since the amorphous magnetic material is generally harder than the crystalline magnetic material, the crystalline magnetic material is non-spherical and is easily deformed during press molding, which may be preferable.

本發明一實施形態之壓粉鐵芯1含有的非晶質磁性材料之粉末之形狀,可以是在製造粉末的階段獲得的形狀,或對製造的粉末實施二次加工而獲得的形狀。前者之形狀例如有球狀、橢圓球狀、針狀等,後者之形狀例如有鱗片狀。 The shape of the powder of the amorphous magnetic material contained in the dust core 1 according to the embodiment of the present invention may be a shape obtained at the stage of producing a powder or a shape obtained by subjecting the produced powder to secondary processing. The shape of the former is, for example, a spherical shape, an elliptical shape, a needle shape, or the like, and the shape of the latter is, for example, scaly.

本發明一實施形態之壓粉鐵芯1含有的非晶質磁性材料之粉末之粒徑不限定。該粒徑藉由中值粒徑D50界定時通常設為1μm至20μm之範圍。就提高處理性觀點而言,非晶質磁性材料之粉末之中值粒徑D50(本說明書中亦稱為「第二中值粒徑d2」),較好是設為1μm以上,更好是設為2μm以上,特別好是設為3μm以上。 The particle diameter of the powder of the amorphous magnetic material contained in the dust core 1 according to the embodiment of the present invention is not limited. The particle diameter is usually set in the range of 1 μm to 20 μm when defined by the median diameter D50. From the viewpoint of improving the handleability, the powder of the amorphous magnetic material has a median diameter D50 (also referred to as "second median diameter d2" in the present specification), and is preferably 1 μm or more, more preferably It is set to 2 μm or more, and particularly preferably set to 3 μm or more.

就提高壓粉鐵芯1中非晶質及結晶質之磁性材料之粉 末之填充密度觀點等而言,非晶質磁性材料之粉末之中值粒徑D50,較好是設為15μm以下,更好是設為12μm以下,特別好是設為6μm以下。又,欲實現壓粉鐵芯1之高絕緣電阻與低鐵損Pcv時,非晶質磁性材料之粉末之中值粒徑D50設為6μm以下時較好之情況存在。就實現壓粉鐵芯1之良好的直流重疊特性與高頻帶中之低鐵損Pcv的觀點而言,非晶質磁性材料之粉末之中值粒徑D50設為5μm以下時較好之情況存在。 To improve the powder of the amorphous and crystalline magnetic material in the powder core 1 The powder of the amorphous magnetic material has a median diameter D50 of preferably 15 μm or less, more preferably 12 μm or less, and particularly preferably 6 μm or less. Moreover, when the high insulation resistance of the dust core 1 and the low iron loss Pcv are desired, it is preferable that the powder of the amorphous magnetic material has a median diameter D50 of 6 μm or less. From the viewpoint of achieving good DC superposition characteristics of the dust core 1 and low iron loss Pcv in the high frequency band, it is preferable that the powder of the amorphous magnetic material has a median diameter D50 of 5 μm or less. .

第一中值粒徑d1與第二中值粒徑d2之關係不限定。一般而言,非晶質磁性材料較結晶質磁性材料硬質,因此,較好是將第一中值粒徑d1設為相對小,使非晶質磁性材料之粉末填充時產生的空隙部容易被結晶質磁性材料之粉末填充。此時,d1/d2較好是設為0.8以下,更好是設為0.5以下。 The relationship between the first median diameter d1 and the second median diameter d2 is not limited. In general, since the amorphous magnetic material is harder than the crystalline magnetic material, it is preferable that the first median diameter d1 is relatively small, and the void portion generated when the powder of the amorphous magnetic material is filled is easily Powder filling of crystalline magnetic material. In this case, d1/d2 is preferably set to 0.8 or less, and more preferably set to 0.5 or less.

本發明一實施形態之壓粉鐵芯1中非晶質磁性材料之粉末的含有量,係以壓粉鐵芯1滿足後述之鐵損Pcv之相關條件的方式,依據壓粉鐵芯1中與結晶質磁性材料的含有量之關係加以設定。 The content of the powder of the amorphous magnetic material in the dust core 1 according to the embodiment of the present invention is based on the method in which the dust core 1 satisfies the condition of the iron loss Pcv described later, and is based on the powder core 1 The relationship between the content of the crystalline magnetic material is set.

(3)鐵損Pcv對頻率依存性 (3) Iron loss Pcv versus frequency dependence

本發明一實施形態之壓粉鐵芯1中,鐵損Pcv(單位:kW/m3)對頻率f(單位:kHz)依存性係滿足以下之關係。亦即,針對在有效最大磁通密度Bm為15mT之條件下測定的鐵損Pcv對頻率f依存性,使用2個常數kh及ke而以下 述式(1)表示時,一方之常數kh為1.5×10-3kW/m3/kHz/(mT)1.6以下,而且另一方之常數ke為3.0×10-7kW/m3/(kHz)2/(mT)2以下。 In the dust core 1 according to the embodiment of the present invention, the dependence of the iron loss Pcv (unit: kW/m 3 ) on the frequency f (unit: kHz) satisfies the following relationship. In other words, the dependence of the iron loss Pcv on the frequency f measured under the condition that the effective maximum magnetic flux density B m is 15 mT is expressed by the following formula (1) using two constants k h and k e . k h is 1.5 × 10 -3 kW / m 3 / kHz / (mT) 1.6 or less, and the other constant k e is 3.0 × 10 -7 kW / m 3 / (kHz) 2 / (mT) 2 or less.

Pcv=kh×f×Bm 1.6+ke×f2×Bm 2 (1) Pcv=k h ×f×B m 1.6 +k e ×f 2 ×B m 2 (1)

又,本說明書中,常數kh、ke係依據鐵損Pcv在1MHz至3MHz之範圍內對對頻率f依存性算出者。 Further, in the present specification, the constants k h and k e are calculated based on the iron loss Pcv in the range of 1 MHz to 3 MHz with respect to the frequency f dependency.

藉由設定常數kh、ke成為上述範圍內,則頻率f之上升伴隨的鐵損Pcv之上升程度呈平穩,即使成為1MHz以上之高頻,鐵損Pcv亦不容易升高。就設定鐵損Pcv對頻率f依存性成為更穩定良好之觀點而言,常數kh,較好是設為1.0×10-3kW/m3/kHz/(mT)1.6以下,更好是設為0.8×10-3kW/m3/kHz/(mT)1.6以下。又,就上述觀點而言,常數ke,較好是設為2.8×10-7kW/m3/(kHz)2/(mT)2以下,更好是設為2.7×10-7kW/m3/(kHz)2/(mT)2以下。 When the set constants k h and k e are within the above range, the degree of increase in the iron loss Pcv due to the increase in the frequency f is stable, and even if the frequency is 1 MHz or higher, the iron loss Pcv does not easily increase. The constant k h is preferably set to 1.0 × 10 -3 kW / m 3 / kHz / (mT) 1.6 or less, from the viewpoint that the iron loss Pcv is more stable in terms of frequency f dependency. It is 0.8 × 10 -3 kW / m 3 / kHz / (mT) 1.6 or less. Further, from the above viewpoints, the constant k e is preferably set to 2.8 × 10 -7 kW/m 3 /(kHz) 2 /(mT) 2 or less, more preferably 2.7 × 10 -7 kW / m 3 /(kHz) 2 /(mT) 2 or less.

就設定鐵損Pcv對頻率f依存性成為更穩定良好之觀點而言,常數kh、ke之下限無限定。通常,常數kh在1.0×10-4kW/m3/kHz/(mT)1.6以上,常數ke在1.0×10-7kW/m3/(kHz)2/(mT)2以上。 The lower limit of the constants k h and k e is not limited from the viewpoint that the iron loss Pcv has a more stable frequency f dependency. Usually, the constant k h is 1.0 × 10 -4 kW / m 3 / kHz / (mT) 1.6 or more, and the constant k e is 1.0 × 10 -7 kW / m 3 / (kHz) 2 / (mT) 2 or more.

本發明一實施形態之壓粉鐵芯1中,結晶質磁性材料之粉末的含有量與非晶質磁性材料之粉末的含有量之關係對上述常數kh、ke之影響如下。 In the dust core 1 according to the embodiment of the present invention, the influence of the content of the powder of the crystalline magnetic material and the content of the powder of the amorphous magnetic material on the constants k h and k e is as follows.

基本的傾向是,第一混合比率(結晶質磁性材料之粉末的含有量對結晶質磁性材料之粉末的含有量與 非晶質磁性材料之粉末的含有量之總和的質量比率)越高,2個常數kh、ke之任一亦變高。因此,第一混合比率越高,鐵損Pcv變高之傾向存在。 The basic tendency is that the first mixing ratio (the mass ratio of the content of the powder of the crystalline magnetic material to the sum of the content of the powder of the crystalline magnetic material and the content of the powder of the amorphous magnetic material) is higher, 2 Any one of the constants k h and k e also becomes high. Therefore, the higher the first mixing ratio, the tendency for the iron loss Pcv to become higher.

詳細確認第一混合比率之變化與常數kh、ke之變化之關係,獲知該關係為非線性,其傾向為第一混合比率越低越顯著。亦即,第一混合比率在40質量%左右以下時,即使第一混合比率增加,2個常數kh、ke之任一之增加程度亦較少。依據上述(1)式,2個常數kh、ke越低,即使有效最大磁通密度Bm及頻率f變高鐵損Pcv亦不容易增大。因此,就抑制鐵損Pcv之上升之機能(以下亦稱為「鐵損抑制機能」)而言,第一混合比率低者更能有效發揮該抑制機能。就更能有效發揮該鐵損抑制機能觀點而言,第一混合比率,較好是設為35質量%以下,更好是設為30質量%以下,特別好是設為20質量%以下。又,欲提高直流重疊特性時,第一混合比率較好是設為5質量%以上,更好是設為10質量%以上,特別好是設為15質量%以上。就壓粉鐵芯1兼具備發揮鐵損抑制機能與直流重疊特性之提升觀點而言,第一混合比率,較好是設為5質量%以上40質量%,更好是設為15質量%以上30質量%。 The relationship between the change in the first mixing ratio and the change in the constants k h and k e was confirmed in detail, and it was found that the relationship was nonlinear, and the tendency was that the lower the first mixing ratio, the more remarkable. That is, when the first mixing ratio is about 40% by mass or less, even if the first mixing ratio is increased, the degree of increase of either of the two constants k h and k e is small. According to the above formula (1), the lower the two constants k h and k e , the higher the maximum magnetic flux density B m and the higher the frequency f, the higher the iron loss Pcv does not easily increase. Therefore, in order to suppress the increase in the iron loss Pcv (hereinafter also referred to as "iron loss suppression function"), the suppression function can be more effectively exhibited by the first mixing ratio. In view of the iron loss-reducing function, the first mixing ratio is preferably 35 mass% or less, more preferably 30 mass% or less, and particularly preferably 20 mass% or less. In addition, when the DC superposition characteristic is to be improved, the first mixing ratio is preferably 5% by mass or more, more preferably 10% by mass or more, and particularly preferably 15% by mass or more. The first mixing ratio is preferably 5% by mass or more and 40% by mass, and more preferably 15% by mass or more, from the viewpoint of improving the iron loss suppressing function and the DC overlapping property. 30% by mass.

第一混合比率變高時,基本的傾向是鐵損Pcv增加,其增大之傾向具有以下之頻率依存性。亦即,依據第一混合比率為0質量%時(僅有非晶質磁性材料之粉末時)之鐵損Pcv,針對任意之第一混合比率時之鐵損Pcv 進行規格化而獲得鐵損變化率,該鐵損變化率隨著第一混合比率越變高而變大,但是鐵損變化率之增大程度,隨著頻率越高呈現緩和。如後述實施例所示,2MHz中鐵損變化率之增大對第一混合比率依存性,成為100kHz中鐵損變化率之增大對第一混合比率依存性之一半左右。因此,具備本發明一實施形態之壓粉鐵芯1的電子/電氣元件,在高頻帶使用的用途時越不容易產生鐵損Pcv之影響。 When the first mixing ratio becomes high, the basic tendency is that the iron loss Pcv increases, and the tendency to increase has the following frequency dependence. That is, according to the iron loss Pcv when the first mixing ratio is 0% by mass (when only the powder of the amorphous magnetic material), the iron loss Pc v at any first mixing ratio is normalized to obtain the iron loss. The rate of change, the rate of change in iron loss becomes larger as the first mixing ratio becomes higher, but the degree of increase in the rate of change in iron loss is moderated as the frequency is higher. As shown in the later-described embodiment, the increase in the iron loss change rate in 2 MHz is dependent on the first mixing ratio, and the increase in the iron loss change rate at 100 kHz is about one-half the dependence on the first mixing ratio. Therefore, the electronic/electrical component including the dust core 1 according to the embodiment of the present invention is less likely to cause the influence of the iron loss Pcv when it is used in a high frequency band.

(4)黏結成分 (4) Adhesive components

黏結成分,只要是可以將本實施形態之壓粉鐵芯1含有的結晶質磁性材料之粉末及非晶質磁性材料之粉末(本說明書中亦有總稱彼等粉末為「磁性粉末」)予以固定之材料即可,其組成不限定。構成黏結成分的材料,例如可為樹脂材料及樹脂材料之熱分解殘渣(本說明書中總稱彼等為「以樹脂材料為基礎的成分」)等之有機系之材料、無機系之材料等。樹脂材料例如可為丙烯酸樹脂、矽酮樹脂、環氧樹脂、酚樹脂、尿素樹脂、三聚氰胺樹脂等。由無機系之材料構成的黏結成分例如可為水玻璃等玻璃系材料。黏結成分可由一種類之材料構成,或由複數之材料構成。黏結成分可為有機系之材料與無機系之材料之混合體。 The binder component can be fixed by the powder of the crystalline magnetic material and the powder of the amorphous magnetic material contained in the dust core 1 of the present embodiment (the powder is also referred to as "magnetic powder" in the present specification). The material is only required, and its composition is not limited. The material constituting the adhesive component may be, for example, an organic material such as a resin material or a thermal decomposition residue of a resin material (referred to as "reagent-based component" in the present specification), an inorganic material, or the like. The resin material may be, for example, an acrylic resin, an anthrone resin, an epoxy resin, a phenol resin, a urea resin, a melamine resin or the like. The bonding component made of an inorganic material may be, for example, a glass-based material such as water glass. The bonding component may be composed of one type of material or a plurality of materials. The bonding component may be a mixture of an organic material and an inorganic material.

黏結成分,通常使用絕緣性之材料。如此則,可以提高壓粉鐵芯1之絕緣性。 Bonding components, usually using insulating materials. In this way, the insulation of the dust core 1 can be improved.

2.壓粉鐵芯之製造方法 2. Method for manufacturing powdered iron core

上述本發明一實施形態之壓粉鐵芯1之製造方法並未特別限定,採用以下說明之製造方法可以更有效製造壓粉鐵芯1。 The method for producing the dust core 1 according to the embodiment of the present invention is not particularly limited, and the dust core 1 can be more efficiently produced by the manufacturing method described below.

本發明一實施形態之壓粉鐵芯1之製造方法,係具備以下說明的成形工程,可以更進一步具備熱處理工程。 The method for producing the dust core 1 according to the embodiment of the present invention includes the molding process described below, and may further include a heat treatment process.

(1)成形工程 (1) Forming engineering

首先,準備混合物,該混合物包含磁性粉末及對壓粉鐵芯1提供黏結成分的成分。提供黏結成分的成分(本說明書中亦稱為「黏結劑成分」),有可能指黏結成分本身,亦有可能指和黏結成分不同的材料。後者之具體例,例如黏結劑成分為樹脂材料,黏結成分為其熱分解殘渣。 First, a mixture is prepared which contains a magnetic powder and a component which provides a binder component to the dust core 1 . The component that provides the bonding component (also referred to as "adhesive component" in this specification) may refer to the bonding component itself, and may also refer to a material different from the bonding component. In the specific example of the latter, for example, the binder component is a resin material, and the binder component is a thermal decomposition residue thereof.

藉由包含該混合物之加壓成形的成形處理可以獲得成形製造物。加壓條件不限定,可以依據黏結劑成分之組成等適當決定。例如黏結劑成分由熱硬化性樹脂構成時,較好是加壓之同時加熱,於模具內進行樹脂之硬化反應。另外,壓縮成形時加壓力高但加熱並非必要條件,而成為短時間之加壓。 The shaped article can be obtained by a forming process of press forming containing the mixture. The pressurization conditions are not limited and may be appropriately determined depending on the composition of the binder component and the like. For example, when the binder component is composed of a thermosetting resin, it is preferably heated while being pressurized, and a resin hardening reaction is carried out in the mold. Further, the pressing force at the time of compression molding is high, but heating is not a necessary condition, and it becomes a pressurization for a short time.

以下詳細說明混合物為造粒粉,進行壓縮成形時。造粒粉在處理特性上具有優點,成形時間短可以提升具良好生產性的壓縮成形工程之作業性。 Hereinafter, the mixture is granulated powder and subjected to compression molding. The granulated powder has advantages in handling characteristics, and the short forming time can improve the workability of a compression molding process with good productivity.

(1-1)造粒粉 (1-1) Granulated powder

造粒粉含有磁性粉末及黏結劑成分。造粒粉中黏結劑成分的含有量未特別限定。該含有量過低時,黏結劑成分難以保持磁性粉末。又,黏結劑成分的含有量過低時,經過熱處理工程獲得的壓粉鐵芯1中,黏結劑成分之熱分解殘渣構成的黏結成分使得複數磁性粉末互相之間難以絕緣。另外,上述黏結劑成分的含有量過高時,經過熱處理工程獲得的壓粉鐵芯1含有的黏結成分的含有量容易變高。壓粉鐵芯1中之黏結成分的含有量變高時,壓粉鐵芯1之磁氣特性容易減低。因此,造粒粉中之黏結劑成分的含有量,相對於造粒粉全體較好是設為0.5質量%以上5.0質量%以下量。就穩定減輕壓粉鐵芯1之磁氣特性降低之可能性之觀點而言,造粒粉中之黏結劑成分的含有量,相對於造粒粉全體較好是設為1.0質量%以上3.5質量%以下量,更好是設為1.2質量%以上3.0質量%以下量。 The granulated powder contains magnetic powder and a binder component. The content of the binder component in the granulated powder is not particularly limited. When the content is too low, it is difficult for the binder component to retain the magnetic powder. Further, when the content of the binder component is too low, the binder component composed of the thermal decomposition residue of the binder component in the dust core 1 obtained by the heat treatment process makes it difficult to insulate the plurality of magnetic powders from each other. In addition, when the content of the above-mentioned binder component is too high, the content of the binder component contained in the dust core 1 obtained by the heat treatment process tends to be high. When the content of the binder component in the dust core 1 becomes high, the magnetic characteristics of the powder core 1 are easily reduced. Therefore, the content of the binder component in the granulated powder is preferably 0.5% by mass or more and 5.0% by mass or less based on the total amount of the granulated powder. The content of the binder component in the granulated powder is preferably 1.0% by mass or more and 3.5 mass based on the total amount of the granulated powder, from the viewpoint of stabilizing the possibility of reducing the magnetic characteristics of the powdered iron core 1 . The amount of % or less is more preferably 1.2% by mass or more and 3.0% by mass or less.

造粒粉可以含有上述磁性粉末及黏結劑成分以外之材料。此種材料例如可為潤滑劑、矽烷偶聯劑,絕緣性之填料等。含有潤滑劑時,其種類未特別限定。可以是有機系之潤滑劑,也可以是無機系之潤滑劑。有機系之潤滑劑之具體例可為硬脂酸鋅,硬脂酸鋁等之金屬皂。此種有機系之潤滑劑可於熱處理工程氣化,幾乎不殘留於壓粉鐵芯1。 The granulated powder may contain materials other than the above magnetic powder and binder components. Such a material may be, for example, a lubricant, a decane coupling agent, an insulating filler or the like. When the lubricant is contained, the kind thereof is not particularly limited. It may be an organic lubricant or an inorganic lubricant. A specific example of the organic-based lubricant may be a metal soap such as zinc stearate or aluminum stearate. Such an organic lubricant can be vaporized in a heat treatment process and hardly remains in the dust core 1 .

造粒粉之製造方法未特別限定。可以直接混合鍊製提供上述造粒粉的成分,以習知方法將獲得的混煉 物粉碎等來獲得造粒粉,或於上述成分添加分散媒(水為其之一例)調製成為漿,使該漿乾燥藉由粉碎獲得造粒粉。粉碎後進行篩選或分級,對造粒粉之粒度分布進行控制。 The method for producing the granulated powder is not particularly limited. The mixture of the above granulated powder may be directly mixed and the mixture obtained by a conventional method may be obtained. The granulated powder is obtained by pulverizing the material or the like, or a dispersion medium (water is used as an example) is added to the above-mentioned components to prepare a slurry, and the slurry is dried to obtain a granulated powder by pulverization. After pulverization, screening or grading is performed to control the particle size distribution of the granulated powder.

由上述漿獲得造粒粉之方法之一例可以是使用噴霧乾燥器之方法。如圖2所示,於噴霧乾燥器裝置200內設置旋轉子201,由裝置上部將漿S朝旋轉子201注入。旋轉子201以特定旋轉數旋轉,於裝置200內部之腔室藉由離心力使漿S成為小滴狀進行噴霧。另於裝置200內部之腔室導入熱風,使小滴狀之漿S含有的分散媒(水),維持小滴形狀並被揮發。其結果,由漿S形成造粒粉P。由裝置200之下部回收該造粒粉P。旋轉子201之旋轉數、噴霧乾燥器裝置200內所導入之熱風溫度、腔室下部之溫度等各參數適當設定即可。彼等參數之設定範圍之具體例,例如可將旋轉子201之旋轉數設為4000~6000rpm,將噴霧乾燥器裝置200內所導入之熱風溫度設為130~170℃,將腔室下部之溫度設為80~90℃。又,腔室內之氛圍及其壓力亦可以適當設定。其中一例,例如可以將腔室內設為空氣氛圍,其壓力基於與大氣壓之差壓而設為2mmH2O(約0.02kPa)。所獲得的造粒粉P之粒度分布可以藉由篩選等進一步控制。 An example of the method of obtaining the granulated powder from the above slurry may be a method using a spray dryer. As shown in Fig. 2, a rotor 201 is provided in the spray dryer unit 200, and the slurry S is injected into the rotor 201 from the upper portion of the apparatus. The rotator 201 is rotated by a specific number of rotations, and the slurry S is sprayed in a droplet shape by centrifugal force in a chamber inside the apparatus 200. Further, hot air is introduced into the chamber inside the apparatus 200, and the dispersion medium (water) contained in the droplet-shaped slurry S is maintained in a droplet shape and volatilized. As a result, the granulated powder P is formed from the slurry S. The granulated powder P is recovered from the lower portion of the apparatus 200. The parameters such as the number of rotations of the rotor 201, the temperature of the hot air introduced into the spray dryer device 200, and the temperature of the lower portion of the chamber may be appropriately set. For a specific example of the setting range of the parameters, for example, the number of rotations of the rotor 201 can be set to 4000 to 6000 rpm, and the temperature of the hot air introduced into the spray dryer device 200 can be set to 130 to 170 ° C to lower the temperature of the lower portion of the chamber. Set to 80~90°C. Moreover, the atmosphere and the pressure inside the chamber can also be appropriately set. For example, for example, the chamber may be an air atmosphere, and the pressure is set to 2 mm H 2 O (about 0.02 kPa) based on the pressure difference from the atmospheric pressure. The particle size distribution of the obtained granulated powder P can be further controlled by screening or the like.

(1-2)加壓條件 (1-2) Pressurization conditions

壓縮成形中加壓條件未特別限定。可以考慮造粒粉之 組成、成形品之形狀等適當設定。造粒粉之壓縮成形時之加壓力過低時,成形品之機械強度減低。因此,成形品之處理性減低,由成形品獲得的壓粉鐵芯1之機械強度減低等問題容易產生。又,壓粉鐵芯1之磁氣特性有可能減低,絕緣性有可能減低。另外,造粒粉之壓縮成形時之加壓力過高時,製作耐該壓力之成形模具會有困難。就穩定減輕壓縮加壓工程對壓粉鐵芯1之機械特性或磁氣特性造成之不良影響,工業上容易大量生產之觀點而言,造粒粉壓縮成形時之加壓力較好是設為0.3GPa以上2GPa以下,更好是設為0.5GPa以上2GPa以下,特別好是設為0.8GPa以上2GPa以下。 The pressing conditions in the compression molding are not particularly limited. Can consider granulated powder The composition, the shape of the molded article, and the like are appropriately set. When the pressing force at the time of compression molding of the granulated powder is too low, the mechanical strength of the molded article is lowered. Therefore, the shape of the molded article is rationally reduced, and problems such as a decrease in the mechanical strength of the dust core 1 obtained from the molded article are likely to occur. Further, the magnetic characteristics of the dust core 1 may be reduced, and the insulation may be reduced. Further, when the pressing force at the time of compression molding of the granulated powder is too high, it is difficult to produce a molding die resistant to the pressure. In terms of stabilizing and mitigating the adverse effects of the compression and pressurization engineering on the mechanical properties or magnetic properties of the powdered iron core 1, the industrial pressure is easy to mass-produce, and the pressing force during compression molding of the granulated powder is preferably set to 0.3. GPa or more is 2 GPa or less, more preferably 0.5 GPa or more and 2 GPa or less, and particularly preferably 0.8 GPa or more and 2 GPa or less.

壓縮成形可以加熱之同時加壓,或於常溫加壓。 The compression molding can be pressurized while heating, or pressurized at room temperature.

(2)熱處理工程 (2) Heat treatment engineering

通過成形工程獲得的成形製造物可以是本實施形態之壓粉鐵芯1,或如以下說明般對成形製造物實施熱處理工程來獲得壓粉鐵芯1。 The molded article obtained by the forming process may be the dust core 1 of the present embodiment, or a heat-treated project may be performed on the molded article to obtain the dust core 1 as described below.

熱處理工程中,藉由對上述成形工程獲得的成形製造物進行加熱,修正磁性粉末間之距離進行磁氣特性之調整,及緩和成形工程中賦予磁性粉末之變形進行磁氣特性之調整,獲得壓粉鐵芯1。 In the heat treatment process, the molded article obtained by the above-mentioned forming process is heated, the distance between the magnetic powders is corrected, the magnetic properties are adjusted, and the deformation of the magnetic powder in the forming process is relaxed to adjust the magnetic properties, and the pressure is obtained. Powder iron core 1.

熱處理工程目的如上述說明在調整壓粉鐵芯1之磁氣特性,因此熱處理溫度等之熱處理條件設為壓粉鐵 芯1之磁氣特性成為最良好者。熱處理條件之設定方法之一例,例如可以是變化成形製造物之加熱溫度,保持昇溫速度及加熱溫度之保持時間等其他條件為一定。 The purpose of the heat treatment project is to adjust the magnetic characteristics of the dust core 1 as described above, so the heat treatment temperature and the like are set as the powder iron. The magnetic gas characteristics of the core 1 are the best. An example of the method of setting the heat treatment conditions may be, for example, changing the heating temperature of the molded article, and maintaining other conditions such as the temperature increase rate and the holding time of the heating temperature.

熱處理條件設定時之壓粉鐵芯1之磁氣特性之評估基準未特別限定。評估項目之具體例可以是壓粉鐵芯1之鐵損Pcv。此時,設定成形製造物之加熱溫度以使壓粉鐵芯1之鐵損Pcv成為最低即可。鐵損Pcv之測定條件被適當設定,例如可以是頻率100kHz,最大磁通密度100mT之條件。 The evaluation criteria of the magnetic gas characteristics of the dust core 1 at the time of setting the heat treatment conditions are not particularly limited. A specific example of the evaluation item may be the iron loss Pcv of the dust core 1. At this time, the heating temperature of the molded article is set so that the iron loss Pcv of the dust core 1 can be minimized. The measurement conditions of the iron loss Pcv are appropriately set, and may be, for example, a condition of a frequency of 100 kHz and a maximum magnetic flux density of 100 mT.

熱處理時之氛圍未特別限定。氧化性氛圍時,黏結劑成分之熱分解過度進行之可能性,或磁性粉末之氧化進行之可能性高,因此較好是在氮、氬等惰性氛圍或氫等之還元性氛圍下進行熱處理。 The atmosphere at the time of heat treatment is not particularly limited. In the oxidizing atmosphere, the possibility of excessive thermal decomposition of the binder component or the possibility of oxidation of the magnetic powder is high. Therefore, it is preferred to carry out heat treatment in an inert atmosphere such as nitrogen or argon or a reductive atmosphere such as hydrogen.

3.電子/電氣元件 3. Electronic / electrical components

本發明一實施形態之電子/電氣元件,係具備上述本發明一實施形態之壓粉鐵芯1,線圈及與該線圈之各個端部連接的連接端子。於此,壓粉鐵芯1之至少一部分配置成為,透過連接端子使電流流入線圈時位於該電流產生的感應磁場內。 An electronic/electrical component according to an embodiment of the present invention includes the dust core 1 according to the embodiment of the present invention, a coil, and a connection terminal connected to each end of the coil. Here, at least a part of the dust core 1 is disposed such that a current flows into the coil through the connection terminal and is located in an induced magnetic field generated by the current.

此種電子/電氣元件之一例可為圖3所示環形線圈10。環形線圈10,係具備於環狀之壓粉鐵芯(環形鐵芯)1卷繞被覆導電線2而形成的線圈2a。在由卷繞的被覆導電線2構成的線圈2a與被覆導電線2之端部2b、 2c之間所在的導電線之部分中,可以定義線圈2a之端部2d、2e。如上述說明,本實施形態之電子/電氣元件中,構成線圈的構件與構成連接端子的構件可由同一構件構成。 An example of such an electronic/electrical component may be the toroidal coil 10 shown in FIG. The toroidal coil 10 is provided with a coil 2a formed by winding a coated conductive wire 2 around an annular powder core (annular iron core) 1. The coil 2a composed of the wound coated conductive wire 2 and the end portion 2b covering the conductive wire 2, In the portion of the conductive line between 2c, the ends 2d, 2e of the coil 2a can be defined. As described above, in the electronic/electrical component of the present embodiment, the member constituting the coil and the member constituting the connection terminal can be constituted by the same member.

本發明一實施形態之電子/電氣元件,係具備合上述本發明一實施形態之壓粉鐵芯1不同形狀的壓粉鐵芯。此種電子/電氣元件之具體例,可為圖4所示電感零件20。圖4表示本發明一實施形態之電感零件20之全體構成之局部透視之斜視圖。圖4中電感零件20之下面(安裝面)以朝上之姿勢表示。圖5係將圖4所示電感零件20安裝於安裝基板100上的狀態之部分正面圖。 An electronic/electrical component according to an embodiment of the present invention includes a dust core having different shapes of the dust core 1 according to the embodiment of the present invention. A specific example of such an electronic/electrical component can be the inductor component 20 shown in FIG. Fig. 4 is a partially perspective perspective view showing the overall configuration of an inductance component 20 according to an embodiment of the present invention. The lower surface (mounting surface) of the inductance component 20 in Fig. 4 is shown in an upward posture. FIG. 5 is a partial front elevational view showing a state in which the inductance component 20 shown in FIG. 4 is mounted on the mounting substrate 100.

圖4所示電感零件20構成為具備:壓粉鐵芯3,埋入壓粉鐵芯3之內部的作為線圈之空芯線圈5,藉由溶接電連接於空芯線圈5的作為連接端子之一對端子部4。 The inductor component 20 shown in FIG. 4 is configured to include a dust core 3, and an air core coil 5 as a coil embedded in the dust core 3, and is electrically connected to the air core coil 5 as a connection terminal by fusion bonding. A pair of terminal portions 4.

空芯線圈5係將絕緣被膜導線卷繞成為螺旋狀而形成者。空芯線圈5構成為具有卷繞部5a及由卷繞部5a引出的引出端部5b、5b。空芯線圈5之卷繞數可依必要之電感適當設定。 The air-core coil 5 is formed by winding an insulating film conductor into a spiral shape. The air-core coil 5 is configured to have a winding portion 5a and lead ends 5b and 5b which are led out by the winding portion 5a. The number of windings of the air-core coil 5 can be appropriately set according to the necessary inductance.

如圖4所示,壓粉鐵芯3中,在與安裝基板相對的安裝面3a,形成收納端子部4之一部分之收納凹部30。收納凹部30,形成於安裝面3a之兩側,朝壓粉鐵芯3之側面3b、3c開放而形成。 As shown in FIG. 4, in the dust core 3, a housing recess 30 that accommodates one of the terminal portions 4 is formed on the mounting surface 3a that faces the mounting substrate. The housing recess 30 is formed on both sides of the mounting surface 3a and is formed to open toward the side faces 3b and 3c of the dust core 3.

由壓粉鐵芯3之側面3b、3c突出的端子部4之一部 分係朝安裝面3a折彎,而收納於收納凹部30之內部。 One part of the terminal portion 4 protruding from the side faces 3b, 3c of the dust core 3 The branch is bent toward the mounting surface 3a and housed inside the housing recess 30.

端子部4由薄板狀之Cu基材形成。端子部4構成為具有:埋設於壓粉鐵芯3之內部,電連接於空芯線圈5之引出端部5b、5b的連接端部40;及露出壓粉鐵芯3之外面,由上述壓粉鐵芯3之側面3b、3c朝安裝面3a依序折彎形成的第1彎曲部42a及第2彎曲部42b。連接端部40係溶接於空芯線圈5之溶接部。第1彎曲部42a與第2彎曲部42b,係相對於安裝基板100被焊接的焊接部。焊接部,係由端子部4之中之壓粉鐵芯3露出之部分,至少意味著朝向壓粉鐵芯3之外側之表面。 The terminal portion 4 is formed of a thin Cu-shaped base material. The terminal portion 4 is configured to be embedded in the interior of the dust core 3, electrically connected to the connection end portion 40 of the lead ends 5b, 5b of the air core coil 5, and to expose the outer surface of the dust core 3 by the above pressure The side faces 3b and 3c of the powder iron core 3 are sequentially bent toward the mounting surface 3a to form the first curved portion 42a and the second curved portion 42b. The connection end portion 40 is melted in the fusion portion of the air core coil 5. The first curved portion 42a and the second curved portion 42b are welded portions that are welded to the mounting substrate 100. The welded portion is a portion exposed by the dust core 3 in the terminal portion 4, and at least means a surface facing the outer side of the dust core 3.

端子部4之連接端部40與空芯線圈5之引出端部5b藉由電阻溶接被接合。 The connection end portion 40 of the terminal portion 4 and the lead end portion 5b of the air core coil 5 are joined by resistance welding.

如圖5所示,電感零件20安裝於安裝基板100上。 As shown in FIG. 5, the inductor component 20 is mounted on the mounting substrate 100.

安裝基板100之表面形成有與外部電路導通之導體圖案,藉由該導體圖案之一部分形成用於安裝電感零件20之一對島部(land)110。 The surface of the mounting substrate 100 is formed with a conductor pattern that is electrically connected to an external circuit, and one of the conductor patterns forms a pair of land 110 for mounting the inductive component 20.

如圖5所示,電感零件20中,安裝面3a朝向安裝基板100側,由壓粉鐵芯3露出外部的第1彎曲部42a與第2彎曲部42b在與安裝基板100之島部110之間經由焊錫層120被接合。 As shown in FIG. 5, in the inductor component 20, the mounting surface 3a faces the mounting substrate 100 side, and the first bending portion 42a and the second bending portion 42b which are exposed to the outside by the dust core 3 are on the island portion 110 of the mounting substrate 100. They are joined together via the solder layer 120.

焊接工程,係藉由印刷工程於島部110塗布糊狀之焊錫後,使第2彎曲部42b面對島部110來進行電感零件20之安裝,藉由加熱工程使焊錫溶融。如圖4與 圖5所示,第2彎曲部42b面對安裝基板100之島部110,第1彎曲部42a露出電感零件20之側面3b、3c,魚片狀之焊錫層120被固接於島部110之同時,充分擴展而被固接於焊接部亦即第2彎曲部42b與第1彎曲部42a之雙方之表面。 In the welding process, paste-like solder is applied to the island portion 110 by printing, and the second bending portion 42b is placed facing the island portion 110 to mount the inductor component 20, and the solder is melted by heating. As shown in Figure 4 As shown in FIG. 5, the second curved portion 42b faces the island portion 110 of the mounting substrate 100, the first curved portion 42a exposes the side faces 3b, 3c of the inductor component 20, and the fish-shaped solder layer 120 is fixed to the island portion 110. At the same time, it is sufficiently expanded and fixed to the surfaces of both the second curved portion 42b and the first curved portion 42a, which are welded portions.

4.電子/電氣機器 4. Electronic / electrical machines

本發明一實施形態之電子/電氣機器,係安裝有具備上述本發明一實施形態之壓粉鐵芯的電子/電氣元件者。此種電子/電氣機器,例如可為電源開關電路、電壓昇降電路、具備平滑電路等之電源裝置或小型行動通信機器等。 An electronic/electrical device according to an embodiment of the present invention is an electronic/electrical component including the dust core of the embodiment of the present invention. Such an electronic/electrical device may be, for example, a power switch circuit, a voltage step-up circuit, a power supply device including a smoothing circuit, or a small mobile communication device.

電源開關電路、電壓昇降電路、平滑電路等通常隨著小型化而高頻化,損失增大。本發明一實施形態之電子/電氣元件為電感零件20時,可以兼顧高頻化、良好的直流重疊特性及低損失。因此,即使電子/電氣機器進展至小型化.高速化(高頻化)時,亦容易實現和習知同樣之高效率電路,可以不增加電子/電氣機器之消費電力。 The power switch circuit, the voltage step-up circuit, the smoothing circuit, and the like are generally high-frequency with miniaturization, and the loss is increased. When the electronic/electrical component according to the embodiment of the present invention is the inductance component 20, it is possible to achieve both high frequency, excellent DC superposition characteristics, and low loss. Therefore, even electronic/electrical machines are progressing to miniaturization. When the speed is increased (high frequency), it is easy to realize the same high-efficiency circuit as the conventional one, and it is possible to increase the power consumption of the electronic/electrical machine.

以上說明之實施形態,係為容易理解本發明而記載者並非用於限定本發明者。因此,上述實施形態揭示之各要素,亦包含始於本發明技術範圍之全部設計變更或均等物。 The embodiments described above are intended to facilitate the understanding of the present invention and are not intended to limit the invention. Therefore, each of the elements disclosed in the above embodiments includes all design changes or equivalents that are within the technical scope of the present invention.

例如本發明一實施形態之壓粉鐵芯,係含有 結晶質磁性材料之粉末及非晶質磁性材料之粉末的壓粉鐵芯,可以具備以下特徵:相對於結晶質磁性材料之粉末的含有量與非晶質磁性材料之粉末的含有量之總和,結晶質磁性材料之粉末的含有量之質量比率在5質量%以上40質量%以下。具備上述特徴的壓粉鐵芯,可以進一步具備上述式(1)之前述特徴(一方之常數kh為1.5×10-3kW/m3/kHz/(mT)1.6以下,而且另一方之常數ke為3.0×10-7kW/m3/(kHz)2/(mT)2以下)。 For example, the dust core of the embodiment of the present invention is a dust core including a powder of a crystalline magnetic material and a powder of an amorphous magnetic material, and may have a feature of a powder content of the crystalline magnetic material. The mass ratio of the content of the powder of the amorphous magnetic material to the total amount of the powder of the amorphous magnetic material is 5% by mass or more and 40% by mass or less. The dust core having the above characteristics may further include the above-described characteristics of the above formula (1) (one of the constant k h is 1.5 × 10 -3 kW / m 3 / kHz / (mT) 1.6 or less, and the other constant k e is 3.0 × 10 -7 kW / m 3 / (kHz) 2 / (mT) 2 or less).

[實施例] [Examples]

以下,依據實施例等進一步具體說明本發明,但本發明範圍不限定於彼等實施例等。 Hereinafter, the present invention will be specifically described based on examples and the like, but the scope of the present invention is not limited to the examples and the like.

(實施例1) (Example 1) (1)Fe基非晶質合金粉末之製作 (1) Fabrication of Fe-based amorphous alloy powder

使用水霧化法(water atomized method)秤量,將Fe71原子%Ni6原子%Cr2原子%P11原子%C8原子%B2原子%構成之組成秤重而獲得的非晶質磁性材料之粉末製作成為磁性粉末。第一混合比率(相對於結晶質磁性材料之粉末的含有量與非晶質磁性材料之粉末的含有量之總和,結晶質磁性材料之粉末的含有量之質量比率)為0質量%。 An amorphous magnetic material obtained by weighing a composition of Fe 71 atom% Ni 6 atom% Cr 2 atom% P 11 atom% C 8 atom% B 2 atom% by a water atomized method The powder is made into a magnetic powder. The first mixing ratio (the mass ratio of the content of the powder of the crystalline magnetic material to the content of the powder of the amorphous magnetic material, and the mass ratio of the content of the powder of the crystalline magnetic material) was 0% by mass.

使用日機裝社製「Microtrac粒度分布測定裝置MT3300EX」藉由體積分布來測定所獲得的磁性粉末之粒度分布。結果,體積分布中成為50%之粒徑亦即中值粒徑 D50為5μm。 The particle size distribution of the obtained magnetic powder was measured by volume distribution using "Microtrac particle size distribution measuring apparatus MT3300EX" manufactured by Nikkiso Co., Ltd. As a result, the volume distribution becomes 50% of the particle diameter, that is, the median diameter. The D50 is 5 μm.

(2)造粒粉之製作 (2) Production of granulated powder

上述磁性粉末取97.2質量部,丙烯酸樹脂及酚樹脂構成的絕緣性黏結材取2~3質量部,及硬脂酸鋅構成的潤滑劑取0~0.5質量部,將彼等混合於作為溶媒之水而獲得漿。 The magnetic powder is 97.2 parts by mass, the insulating adhesive material composed of acrylic resin and phenol resin is 2 to 3 parts by mass, and the lubricant composed of zinc stearate is 0 to 0.5 parts by mass, and they are mixed as a solvent. Water is obtained to obtain a slurry.

使用圖2所示噴霧乾燥器裝置200於上述條件下對獲得的漿進行造粒,獲得造粒粉。 The obtained slurry was granulated under the above conditions using the spray dryer device 200 shown in Fig. 2 to obtain a granulated powder.

(3)壓縮成形 (3) compression forming

將獲得的造粒粉填充於模具,以面壓0.5~1.5GPa進行加壓成形,獲得外徑20mm×內徑12mm×厚度3mm之具有環形狀的成形體。 The obtained granulated powder was filled in a mold, and press-molded at a surface pressure of 0.5 to 1.5 GPa to obtain a molded body having a ring shape of an outer diameter of 20 mm, an inner diameter of 12 mm, and a thickness of 3 mm.

(4)熱處理 (4) Heat treatment

將獲得的成形體載置於氮氣流氛圍之爐內,使爐內溫度由室溫(23℃)起依昇溫速度10℃/分至最適鐵芯熱處理溫度200~400℃為止進行加熱,於該溫度下保持1小時,之後,於爐內進行冷卻至室溫之熱處理,獲得由壓粉鐵芯構成的環形鐵芯。 The obtained molded body is placed in a furnace in a nitrogen gas atmosphere, and the furnace temperature is heated from room temperature (23 ° C) to a temperature of 10 ° C / min to an optimum core heat treatment temperature of 200 to 400 ° C. The temperature was maintained for 1 hour, and then heat-treated in a furnace to room temperature to obtain a toroidal core composed of a powdered iron core.

(實施例2及3) (Examples 2 and 3)

調製磁性粉末時,將實施例1使用的非晶質磁性材料 之粉末與由施予絕緣處理的羰基鐵構成的結晶質磁性材料之粉末(中值粒徑D50:4.3μm)混合,除了使用第一混合比率在實施例2為10質量%,在實施例3為20質量%之磁性粉末以外,均和實施例1同樣,製造環形鐵芯。 When the magnetic powder is prepared, the amorphous magnetic material used in Example 1 is used. The powder was mixed with a powder of a crystalline magnetic material (median diameter D50: 4.3 μm) composed of carbonyl iron to which insulation treatment was applied, except that the first mixing ratio was used in Example 2 as 10% by mass, in Example 3 A toroidal core was produced in the same manner as in Example 1 except that the magnetic powder was 20% by mass.

(實施例4) (Example 4)

調製磁性粉末時,除取代實施例1使用的非晶質磁性材料之粉末,改用秤總重之實施例2等所使用的實施絕緣處理的羰基鐵,亦即磁性粉末之第一混合比率設為100質量%以外,均和實施例1同樣,製造環形鐵芯。 When the magnetic powder is prepared, in place of the powder of the amorphous magnetic material used in the first embodiment, the carbonyl iron which is subjected to the insulation treatment used in Example 2 or the like, which is the total weight of the scale, that is, the first mixing ratio of the magnetic powder is used. A toroidal core was produced in the same manner as in Example 1 except that the amount was 100% by mass.

(實施例5、6及7) (Examples 5, 6 and 7)

調製磁性粉末時,將實施例1使用的非晶質磁性材料之粉末與施予絕緣處理的羰基鐵構成的結晶質磁性材料之粉末(中值粒徑D50:4.3μm)混合,除使用第一混合比率為以下之值的磁性粉末以外,均和實施例1同樣,製造環形鐵芯。 When the magnetic powder is prepared, the powder of the amorphous magnetic material used in Example 1 is mixed with the powder of the crystalline magnetic material (median diameter D50: 4.3 μm) composed of the carbonyl iron to be subjected to the insulating treatment, except that the first is used. A toroidal core was produced in the same manner as in Example 1 except that the magnetic powder having a mixing ratio of the following values was used.

實施例5 5質量% Example 5 5 mass%

實施例6 15質量% Example 6 15% by mass

實施例7 30質量% Example 7 30% by mass

(實施例8~12) (Examples 8 to 12)

調製磁性粉末時,取代實施例2~4使用的結晶質磁性材料之粉末,改用未施予絕緣處理之由羰基鐵構成的結晶 質磁性材料之粉末(中值粒徑D50:4.3μm),將該結晶質磁性材料之粉末與實施例1調製的非晶質磁性材料之粉末混合,除使用第一混合比率為以下之值的磁性粉末以外,均和實施例1同樣,製造環形鐵芯。 When the magnetic powder is prepared, instead of the powder of the crystalline magnetic material used in Examples 2 to 4, the crystal composed of carbonyl iron which is not subjected to the insulating treatment is used instead. a powder of a magnetic material (median diameter D50: 4.3 μm), and the powder of the crystalline magnetic material is mixed with the powder of the amorphous magnetic material prepared in Example 1, except that the first mixing ratio is used as the following value A toroidal core was produced in the same manner as in Example 1 except for the magnetic powder.

實施例8 5質量% Example 8 5 mass%

實施例9 10質量% Example 9 10% by mass

實施例10 20質量% Example 10 20% by mass

實施例11 30質量% Example 11 30% by mass

(實施例12) (Embodiment 12)

調製磁性粉末時,取代實施例1使用的非晶質磁性材料之粉末,使用秤總重之實施例8等所使用的未實施絕緣處理的羰基鐵,亦即磁性粉末之第一混合比率設為100質量%以外,均和實施例1同樣,製造環形鐵芯。 When the magnetic powder is prepared, in place of the powder of the amorphous magnetic material used in Example 1, the carbonyl iron which is not subjected to the insulation treatment used in Example 8 or the like, which is the total weight of the scale, that is, the first mixing ratio of the magnetic powder is set. A toroidal core was produced in the same manner as in Example 1 except for 100% by mass.

(實施例13) (Example 13)

除中值粒徑D50為6μm以外均和實施例1之製造方法同樣調製非晶質磁性材料之粉末。使用該非晶質磁性材料之粉末,和實施例1同樣,製造環形鐵芯。 A powder of an amorphous magnetic material was prepared in the same manner as in the production method of Example 1 except that the median diameter D50 was 6 μm. A ring-shaped iron core was produced in the same manner as in Example 1 using the powder of the amorphous magnetic material.

(實施例14及15) (Examples 14 and 15)

將實施例13調整的中值粒徑D50為6μm之非晶質磁性材料之粉末與實施例2等使用的施予絕緣處理的羰基鐵構成的結晶質磁性材料之粉末(中值粒徑D50:4.3μm) 混合,除使用第一混合比率為以下之值的磁性粉末以外,均和實施例1同樣,製造環形鐵芯。 A powder of an amorphous magnetic material having a median diameter D50 of 6 μm adjusted in Example 13 and a crystalline magnetic material of carbonyl iron to be insulated by the use of Example 2 or the like (median diameter D50: 4.3μm) The ring-shaped iron core was produced in the same manner as in Example 1 except that the magnetic powder having the first mixing ratio of the following values was used.

實施例14 10質量% Example 14 10% by mass

實施例15 20重量% Example 15 20% by weight

(試驗例1)鐵損Pcv之測定 (Test Example 1) Measurement of iron loss Pcv

針對在實施例1~15所製作的環形鐵芯分別於1次側卷繞15次、於2次側卷繞10次被覆銅線獲得的環形線圈,使用BH分析儀(岩崎通信機社製「SY-8218」),在有效最大磁通密度Bm設為15mT之條件下,測定鐵損Pcv(單位:kW/m3)對頻率之依存性(測定頻率範圍:100kHz~3MHz)。其結果之一部分如表1所示。由上述條件下測定的各鐵損Pcv中1~3MHz之範圍之頻率依存性之結果求出2個常數kh、ke。結果如表2~4所示。又,表2~4中,依據第一混合比率低的實施例至第一混合比率高的實施例之順序並列表示。又,如實施例1般為求對比之容易而以複數次表示之實施例存在。表2~4所示的100kHz、1MHz、2MHz及3MHz之各鐵損Pcv,係在有效最大磁通密度Bm分別設為100mT、25mT、15mT及15mT之條件下測定之結果。 For the toroidal coils obtained by winding the toroidal cores of the first and second sides, which were wound 15 times on the primary side and 10 times on the secondary side, a BH analyzer (made by Iwasaki Communication Co., Ltd.) SY-8218"), the dependence of the iron loss Pcv (unit: kW/m 3 ) on the frequency (measurement frequency range: 100 kHz to 3 MHz) was measured under the condition that the effective maximum magnetic flux density B m was 15 mT. One of the results is shown in Table 1. Two constants k h and k e were obtained as a result of the frequency dependence of the range of 1 to 3 MHz in each iron loss Pcv measured under the above conditions. The results are shown in Tables 2 to 4. Further, in Tables 2 to 4, the examples in which the first mixing ratio is low to the embodiment in which the first mixing ratio is high are shown in parallel. Further, as in the first embodiment, an embodiment in which a plurality of times are expressed for comparison is easy. The respective iron loss Pcv of 100 kHz, 1 MHz, 2 MHz, and 3 MHz shown in Tables 2 to 4 was measured under the conditions of effective maximum magnetic flux density B m of 100 mT, 25 mT, 15 mT, and 15 mT, respectively.

(試驗例2)導磁率之測定 (Test Example 2) Measurement of magnetic permeability

針對在實施例製作的環形鐵芯分別於1次側卷繞40次、於2次側卷繞10次被覆銅線獲得的環形線圈,使用 阻抗分析儀(HP社製「4192A」),於100kHz之條件下,使初導磁率μ與直流電流重疊,測定直流施加磁場為5500A/m時之相對導磁率μ5500。結果如表2~4所示。 The toroidal coil obtained by winding the toroidal core of the embodiment in 40 times on the primary side and winding the copper wire 10 times on the secondary side, respectively, is used. The impedance analyzer ("4192A" manufactured by HP Co., Ltd.) superposed the initial magnetic permeability μ and the direct current at 100 kHz, and measured the relative magnetic permeability μ5500 when the DC applied magnetic field was 5500 A/m. The results are shown in Tables 2 to 4.

(試驗例3)直流重疊特性之測定 (Test Example 3) Measurement of DC superposition characteristics

使用由實施例製作的環形鐵芯形成之環形線圈,依據JIS C2560-2,使直流電流重疊於環形線圈。藉由電感L相對於重疊電流之施加前(初期)之電感L之值L0的變化量△L之比例(△L/L0)成為30%時之施加電流值Isat(單位:A),對直流重疊特性進行評估。結果如表2~4所示。 A toroidal coil formed by a toroidal core made of the embodiment was used, and a direct current was superposed on the toroidal coil in accordance with JIS C2560-2. Isat value of the applied current by the inductance L with respect to the time before (early) applying the superimposed current value of the inductance L L of the ratio of the amount of change △ L 0 (△ L / L 0) becomes 30% (unit: A), The DC overlap characteristics are evaluated. The results are shown in Tables 2 to 4.

(試驗例4)絕緣電阻之測定 (Test Example 4) Measurement of insulation resistance

藉由表面2端子法測定依實施例製作的環形鐵芯之絕緣電阻(單位:Ω)。結果如表2及4所示。 The insulation resistance (unit: Ω) of the toroidal core produced according to the example was measured by the surface 2-terminal method. The results are shown in Tables 2 and 4.

圖6~15係以曲線表示上述結果者。具體言之,圖6表示實施例中鐵損Pcv之頻率依存性之測定結果之曲線圖。圖7表示常數kh對第一混合比率的依存性之曲線圖。圖8表示常數ke對第一混合比率的依存性之曲線圖。圖9表示100kHz及2MHz中鐵損變化率(以第一混合比率為0質量%時之鐵損Pcv來規格化任意之第一混合比率中鐵損Pcv而成之值)對第一混合比率的依存性之曲線圖。又,圖9中鐵損變化率係於環形鐵芯分別於於1次側卷繞40次,於2次側卷繞10次被覆銅線,針對100kHz者以Bm=100mT進行測定,針對2MHz者以Bm=15mT進行測定者。圖10係絕緣電阻對第一混合比率的依存性之曲線圖。圖11~14表示頻率分別為100kHz(圖11)、1MHz(圖12)、2MHz(圖13)及3MHz(圖14)時鐵損Pcv對第一混合比率的依存性之曲線圖。又,測定時之Bm如各曲線圖內所示,100kHz時為100mT,1MHz時為25mT,及2MHz時為15mT。圖15表示電感L對於重疊電流施加前(初期)之電感L之值L0的變化量△L之比例(△L/L0)成為30%時,的施加電流值(Isat)對第一混合比率的依存性之曲線圖。 Figures 6 to 15 show the above results by curves. Specifically, Fig. 6 is a graph showing the measurement results of the frequency dependence of the iron loss Pcv in the embodiment. Figure 7 is a graph showing the dependence of the constant k h on the first mixing ratio. Figure 8 is a graph showing the dependence of the constant k e on the first mixing ratio. Fig. 9 is a graph showing the rate of change in iron loss at 100 kHz and 2 MHz (the value of the iron loss Pcv at the first mixing ratio of 0% by mass to normalize the iron loss Pcv in the first first mixing ratio) to the first mixing ratio. A graph of dependencies. In addition, the rate of change in iron loss in FIG. 9 is obtained by winding the toroidal core 40 times on the primary side, winding the copper wire 10 times on the secondary side, and measuring B m = 100 mT for 100 kHz, for 2 MHz. The measurement was performed with B m = 15 mT. Figure 10 is a graph of the dependence of the insulation resistance on the first mixing ratio. 11 to 14 are graphs showing the dependence of the iron loss Pcv on the first mixing ratio when the frequencies are 100 kHz (Fig. 11), 1 MHz (Fig. 12), 2 MHz (Fig. 13), and 3 MHz (Fig. 14), respectively. Further, B m at the time of measurement is 100 mT at 100 kHz, 25 mT at 1 MHz, and 15 mT at 2 MHz as shown in the respective graphs. 15 shows the inductance L of (△ L / L 0) becomes 30%, is applied to the first mixed current value (Isat) of value L (initial) variation of the inductance L L of △ 0 the ratio of a superimposed current is applied to the front A graph of the dependence of the ratio.

依據表1~4及圖6~15可以理解以下之事項。 The following items can be understood based on Tables 1 to 4 and Figures 6 to 15.

(A)含有以滿足上述式(1)的方式而調製之磁性粉末的壓粉鐵芯,在廣頻帶中,特別在1MHz以上之高頻帶中具有良好的磁氣特性(鐵損Pcv、初導磁率、直流重疊特性)。 (A) A dust core containing a magnetic powder prepared to satisfy the above formula (1) has excellent magnetic properties (iron loss Pcv, initial conductance) in a wide frequency band, particularly in a high frequency band of 1 MHz or more. Magnetic rate, DC overlap characteristics).

(B)由圖7及圖8可知第1混合比率在30重量%以下時可以維持低值之ke、kh,20重量%以下時成為更低值。因此,可以確認第1混合比率在30重量%以下,較好是20重量%以下時,具有可以抑制高頻帶中鐵損Pcv之增大之效果。反之第1混合比率大於30重量%時ke、kh有上升之傾向,結果,高頻帶中鐵損Pcv大幅增大。又,由圖15可知第1混合比率大於10重量%時施加電流值Isat上升,15重量%以上時變為更大。 (B) It can be seen from FIG. 7 and FIG. 8 that when the first mixing ratio is 30% by weight or less, it can be maintained at a low value of k e , k h , and 20% by weight or less. Therefore, when the first mixing ratio is 30% by weight or less, preferably 20% by weight or less, the effect of suppressing an increase in the iron loss Pcv in the high frequency band can be confirmed. On the other hand, when the first mixing ratio is more than 30% by weight, k e and k h tend to rise, and as a result, the iron loss Pcv in the high frequency band is greatly increased. Moreover, as shown in FIG. 15, it is understood that the applied current value Isat increases when the first mixing ratio is more than 10% by weight, and becomes larger when it is 15% by weight or more.

(C)磁性粉末之第一混合比率變高時鐵損Pcv增加之基本傾向存在,但頻率越高,即使第一混合比率增高時鐵損Pcv亦難以增加。此一傾向可由圖9確認。依據圖9,100kHz時,第一混合比率為10%時鐵損變化率成為2.5,第一混合比率為20%時鐵損變化率為3.6,相對於此,2MHz時,即使第一混合比率為20%鐵損變化率之增加僅止於1.4左右。因此,具有本實施形態之壓粉鐵芯的電子/電氣元件使用於高頻電路時效果變為更顯著。又,小型輕量之電子/電氣機器中電子電路具有高頻化傾向,亦適約於行動用之DC-DC轉換器等。 (C) The basic tendency of the iron loss Pcv to increase when the first mixing ratio of the magnetic powder becomes high exists, but the higher the frequency, the harder the iron loss Pcv is hard to increase even when the first mixing ratio is increased. This tendency can be confirmed by Figure 9. According to Fig. 9, at 100 kHz, the iron loss change rate becomes 2.5 when the first mixing ratio is 10%, and the iron loss change rate is 3.6 when the first mixing ratio is 20%. In contrast, at 2 MHz, even if the first mixing ratio is The increase in the 20% iron loss rate is only around 1.4. Therefore, when the electronic/electrical component having the dust core of the present embodiment is used in a high-frequency circuit, the effect becomes more remarkable. Moreover, electronic circuits in small and lightweight electronic/electrical devices have a tendency to increase in frequency, and are also suitable for DC-DC converters for mobile use.

(D)如圖10所示,和使用含有未實施絕緣處理的結晶質磁性材料之粉末的磁性粉末時比較,使用含有施予絕緣處理的結晶質磁性材料之粉末的磁性粉末時,壓粉鐵芯之絕緣電阻有變高之傾向。 (D) As shown in FIG. 10, when using a magnetic powder containing a powder of a crystalline magnetic material to which an insulating treatment is applied, when using a magnetic powder containing a powder of a crystalline magnetic material which is not subjected to the insulating treatment, the powdered iron is used. The insulation resistance of the core tends to become higher.

(E)如圖11所示,和使用含有未實施絕緣處理的結晶質磁性材料之粉末的磁性粉末時比較,使用含 有施予絕緣處理的結晶質磁性材料之粉末的磁性粉末時,低頻帶中鐵損Pcv較少。此點由圖7所示常數kh之頻率依存性亦可以理解。 (E) As shown in FIG. 11, when using a magnetic powder containing a powder of a crystalline magnetic material to which an insulating treatment is applied, when using a magnetic powder containing a powder of a crystalline magnetic material which is not subjected to the insulating treatment, in a low frequency band There is less iron loss Pcv. This point is also understood by the frequency dependence of the constant k h shown in FIG.

(F)由圖8所示常數ke之頻率依存性可知,使用含有施予絕緣處理的結晶質磁性材料之粉末的磁性粉末時,和使用含有未實施絕緣處理的結晶質磁性材料之粉末的磁性粉末時可以獲得同等之結果。依據該結果可以想定,使用含有施予絕緣處理的結晶質磁性材料之粉末的磁性粉末時,和使用含有未實施絕緣處理的結晶質磁性材料之粉末的磁性粉末時,雙方在高頻帶中鐵損Pcv相同。但是,如圖12~14所示,和使用含有未實施絕緣處理的結晶質磁性材料之粉末的磁性粉末時比較,使用含有施予絕緣處理的結晶質磁性材料之粉末的磁性粉末時在高頻帶中之鐵損Pcv較少。 (F) It is understood from the frequency dependency of the constant k e shown in Fig. 8 that when a magnetic powder containing a powder of a crystalline magnetic material subjected to an insulating treatment is used, and a powder containing a crystalline magnetic material not subjected to an insulating treatment is used, The same result can be obtained with magnetic powder. According to the results, it is conceivable that when a magnetic powder containing a powder of a crystalline magnetic material subjected to an insulating treatment is used, and a magnetic powder containing a powder of a crystalline magnetic material not subjected to an insulating treatment is used, iron loss in both high frequency bands is used. Pcv is the same. However, as shown in FIGS. 12 to 14, the magnetic powder containing the powder of the crystalline magnetic material subjected to the insulating treatment is used in a high frequency band as compared with the case of using a magnetic powder containing a powder of a crystalline magnetic material which is not subjected to the insulating treatment. There is less Pcv in the iron loss.

(G)在磁性粉末含有施予絕緣處理的結晶質磁性材料之中,和磁性粉末含有的非晶質磁性材料之粉末之中值粒徑D50為6μm時比較,磁性粉末含有的非晶質磁性材料之粉末之中值粒徑D50為5μm時,高頻帶中鐵損Pcv有變低之傾向(圖12~14)。該傾向越是高頻越顯著。又,和使用中值粒徑D50為6μm之非晶質磁性材料之粉末時比較,使用中值粒徑D50為5μm之非晶質磁性材料之粉末時直流重疊特性顯現良好之傾向(圖15)。另一方面,磁性粉末含有施予絕緣處理的結晶質磁性材料時,和磁性粉末含有的非晶質磁性材料之粉末之中值粒徑 D50為5μm時比較,磁性粉末含有的非晶質磁性材料之粉末之中值粒徑D50為6μm時絕緣電阻有變高之傾向(圖10)。因此,可以確認依據本實施例,對應於壓粉鐵芯要求之特性,對磁性粉末含有的非晶質磁性材料之粉末之中值粒徑D50進行控制為有效者。 (G) The amorphous magnetic material contained in the magnetic powder is compared with the case where the powder of the amorphous magnetic material containing the magnetic powder contains a median diameter D50 of 6 μm. When the powder median diameter D50 of the material is 5 μm, the iron loss Pcv tends to be low in the high frequency band ( FIGS. 12 to 14 ). The higher the tendency, the more pronounced the high frequency. In addition, when a powder of an amorphous magnetic material having a median diameter D50 of 5 μm is used, the DC superposition property tends to be good when compared with a powder of an amorphous magnetic material having a median diameter D50 of 6 μm ( FIG. 15 ). . On the other hand, when the magnetic powder contains the crystalline magnetic material to which the insulating treatment is applied, and the powder of the amorphous magnetic material contained in the magnetic powder, the median diameter of the powder When the D50 is 5 μm, the insulation resistance of the amorphous magnetic material contained in the magnetic powder tends to be high when the median diameter D50 is 6 μm ( FIG. 10 ). Therefore, according to the present embodiment, it is confirmed that the powder median diameter D50 of the amorphous magnetic material contained in the magnetic powder is controlled to be effective in accordance with the characteristics required for the dust core.

(H)由以上之結果可知,不論實施絕緣處理否,藉由使用由非晶質磁性材料之粉末及結晶質磁性材料之粉末構成的磁性粉末,可以減少高頻帶中鐵損Pcv。又,可以確認使用結晶質磁性材料為由實施絕緣處理之材料構成的磁性粉末時,即使低頻帶中鐵損Pcv亦變小。另外,可以確認藉由對磁性粉末含有的非晶質磁性材料之粉末之中值粒徑D50進行控制,可以調整壓粉鐵芯之磁氣特性或電氣特性。 (H) From the above results, it is understood that the iron loss Pcv in the high frequency band can be reduced by using the magnetic powder composed of the powder of the amorphous magnetic material and the powder of the crystalline magnetic material regardless of the insulation treatment. Further, when the crystalline magnetic material is used as the magnetic powder composed of the material subjected to the insulating treatment, it is confirmed that the iron loss Pcv in the low frequency band is small. In addition, it was confirmed that the magnetic particle characteristics or electrical characteristics of the dust core can be adjusted by controlling the powder median diameter D50 of the amorphous magnetic material contained in the magnetic powder.

[產業上之可利用性] [Industrial availability]

使用本發明之壓粉鐵芯的電子/電氣元件,其適合使用於油電混合動力車等之升壓電路或發電、變電設備使用的電抗器、變壓器或扼流圈等。 The electronic/electrical component using the dust core of the present invention is suitable for use in a booster circuit such as a hybrid electric vehicle or a reactor for generating electricity or a substation, a transformer, a choke coil, or the like.

1‧‧‧壓粉鐵芯(環形鐵芯) 1‧‧‧Powder core (ring core)

Claims (15)

一種壓粉鐵芯,係含有結晶質磁性材料之粉末及非晶質磁性材料之粉末者,其特徵為:使用2個常數kh及ke而以下述式(1),針對在有效最大磁通密度Bm為15mT之條件下測定的鐵損Pcv(單位:kW/m3)對頻率f(單位:kHz)依存性予以表示時,Pcv=kh×f×Bm 1.6+ke×f2×Bm 2 (1)上述常數kh為1.5×10-3kW/m3/kHz/(mT)1.6以下,而且上述常數ke為3.0×10-7kW/m3/(kHz)2/(mT)2以下。 A powdered iron core comprising a powder of a crystalline magnetic material and a powder of an amorphous magnetic material, characterized in that: using two constants k h and k e , the following formula (1) is used for effective maximum magnetic When the iron loss Pcv (unit: kW/m 3 ) measured under the condition that the density B m is 15 mT is expressed in terms of frequency f (unit: kHz), Pcv = k h × f × B m 1.6 + k e × f 2 × B m 2 (1) The above constant k h is 1.5 × 10 -3 kW / m 3 / kHz / (mT) 1.6 or less, and the above constant k e is 3.0 × 10 -7 kW / m 3 / (kHz ) 2 / (mT) 2 or less. 如申請專利範圍第1項之壓粉鐵芯,其中相對於上述結晶質磁性材料之粉末的含有量與上述非晶質磁性材料之粉末的含有量之總和,上述結晶質磁性材料之粉末的含有量之質量比率在5質量%以上40質量%以下。 The powdered iron core according to the first aspect of the invention, wherein the content of the powder of the crystalline magnetic material is the sum of the content of the powder of the crystalline magnetic material and the content of the powder of the amorphous magnetic material The mass ratio of the amount is 5% by mass or more and 40% by mass or less. 如申請專利範圍第1或2項之壓粉鐵芯,其中上述結晶質磁性材料包含:由Fe-Si-Cr系合金、Fe-Ni系合金、Fe-Co系合金、Fe-V系合金、Fe-Al系合金、Fe-Si系合金、Fe-Si-Al系合金、羰基鐵及純鐵構成的群選出的1種或2種以上之材料。 The powdered iron core according to claim 1 or 2, wherein the crystalline magnetic material comprises: an Fe-Si-Cr alloy, an Fe-Ni alloy, an Fe-Co alloy, an Fe-V alloy, One or two or more materials selected from the group consisting of Fe-Al alloys, Fe-Si alloys, Fe-Si-Al alloys, carbonyl iron, and pure iron. 如申請專利範圍第3項之壓粉鐵芯,其中上述結晶質磁性材料由羰基鐵構成。 The dust core of claim 3, wherein the crystalline magnetic material is composed of carbonyl iron. 如申請專利範圍第1或2項之壓粉鐵芯,其中上述非晶質磁性材料包含:由Fe-Si-B系合金、Fe-P- C系合金及Co-Fe-Si-B系合金構成的群選出的1種或2種以上之材料。 The dust core of claim 1 or 2, wherein the amorphous magnetic material comprises: Fe-Si-B alloy, Fe-P- One or two or more materials selected from the group consisting of a C-based alloy and a Co-Fe-Si-B-based alloy. 如申請專利範圍第5項之壓粉鐵芯,其中上述非晶質磁性材料由Fe-P-C系合金構成。 The dust core of claim 5, wherein the amorphous magnetic material is composed of an Fe-P-C alloy. 如申請專利範圍第1或2項之壓粉鐵芯,其中上述結晶質磁性材料之粉末由施予絕緣處理的材料構成。 A powdered iron core according to claim 1 or 2, wherein the powder of the crystalline magnetic material is composed of a material which is subjected to an insulation treatment. 如申請專利範圍第1或2項之壓粉鐵芯,其中上述非晶質磁性材料之粉末之中值粒徑D50在6μm以下。 The dust core of claim 1 or 2, wherein the amorphous magnetic material has a powder median diameter D50 of 6 μm or less. 如申請專利範圍第1或2項之壓粉鐵芯,其中含有黏結成分,該黏結成分使上述結晶質磁性材料之粉末及上述非晶質磁性材料之粉末,黏結於包含於上述壓粉鐵芯的其他材料。 The powdered iron core according to claim 1 or 2, wherein the powdered component contains a binder component, and the powder of the crystalline magnetic material and the powder of the amorphous magnetic material are bonded to the powder core Other materials. 如申請專利範圍第9項之壓粉鐵芯,其中上述黏結成分含有以樹脂材料為基礎的成分。 For example, in the dust core of claim 9, wherein the above-mentioned adhesive component contains a resin-based component. 一種成形製造物之製造方法,該成形製造物係用於製作申請專利範圍第10項之壓粉鐵芯者,其特徵為:具備藉由包含對混合物之加壓成形的成形處理來獲得上述成形製造物的成形工程,該混合物包含結晶質磁性材料之粉末及非晶質磁性材料之粉末以及由樹脂材料構成的黏結劑成分。 A method for producing a shaped article for use in the production of a powdered iron core according to claim 10, characterized in that it is provided with a forming process comprising press forming of a mixture to obtain the above-mentioned forming A molding process for a product comprising a powder of a crystalline magnetic material and a powder of an amorphous magnetic material and a binder component composed of a resin material. 一種壓粉鐵芯之製造方法,其特徵為:獲得如申請專利範圍第11項之製造方法所製作的成形製造物作為壓粉鐵芯者。 A method for producing a dust core, which is characterized in that a molded article produced by the production method of claim 11 of the patent application is obtained as a powder core. 一種壓粉鐵芯之製造方法,其特徵為具備:熱處理工程,係藉由熱處理對經由如申請專利範圍第11項之製造方法所製作的成形製造物進行加熱來獲得壓粉鐵芯。 A method for producing a powdered iron core, comprising: a heat treatment process of obtaining a dust core by heating a shaped article produced by the method of manufacturing according to claim 11 of the patent application. 一種電子/電氣元件,係具備如申請專利範圍第1或2項之壓粉鐵芯、線圈及連接於上述線圈之各個端部的連接端子者,上述壓粉鐵芯之至少一部分係以位於感應磁場內的方式被配置,該感應磁場係通過上述連接端子使電流流入上述線圈時上述電流所產生者。 An electronic/electrical component comprising: a powdered iron core according to claim 1 or 2, a coil, and a connection terminal connected to each end of the coil, wherein at least a part of the powdered iron core is located in the induction A mode in the magnetic field is generated by the current generated when a current flows into the coil through the connection terminal. 一種電子/電氣機器,係安裝有如申請專利範圍第14項之電子/電氣元件的電子/電氣機器,上述電子/電氣元件經由上述連接端子連接於基板。 An electronic/electrical device is an electronic/electrical device to which an electronic/electrical component as claimed in claim 14 is attached, and the electronic/electrical component is connected to the substrate via the connection terminal.
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