JP7223020B2 - テクスチャード平面m型六方晶フェライトおよびその製造方法 - Google Patents
テクスチャード平面m型六方晶フェライトおよびその製造方法 Download PDFInfo
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- JP7223020B2 JP7223020B2 JP2020545531A JP2020545531A JP7223020B2 JP 7223020 B2 JP7223020 B2 JP 7223020B2 JP 2020545531 A JP2020545531 A JP 2020545531A JP 2020545531 A JP2020545531 A JP 2020545531A JP 7223020 B2 JP7223020 B2 JP 7223020B2
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- hexagonal ferrite
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- 229910000859 α-Fe Inorganic materials 0.000 title claims description 96
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000002019 doping agent Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 20
- 230000035699 permeability Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 14
- 239000013078 crystal Substances 0.000 claims description 13
- 230000005415 magnetization Effects 0.000 claims description 12
- 229910019043 CoSn Inorganic materials 0.000 claims description 11
- 238000005245 sintering Methods 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 29
- 239000000843 powder Substances 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 238000001354 calcination Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000001027 hydrothermal synthesis Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000000975 co-precipitation Methods 0.000 description 3
- 238000003980 solgel method Methods 0.000 description 3
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910052706 scandium Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- -1 step Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910000608 Fe(NO3)3.9H2O Inorganic materials 0.000 description 1
- 229910002588 FeOOH Inorganic materials 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- ITHZDDVSAWDQPZ-UHFFFAOYSA-L barium acetate Chemical compound [Ba+2].CC([O-])=O.CC([O-])=O ITHZDDVSAWDQPZ-UHFFFAOYSA-L 0.000 description 1
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 1
- 229910001863 barium hydroxide Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052566 spinel group Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
- H01F1/348—Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure
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Description
MeFe12O19
と、六方晶構造においてc面における平面磁気異方性および磁化、または容易円錐異方性(easy cone anisotropy)を与えるのに有効なドーパントと、を有し、MeはSr2+、Ba2+またはPb2+であり、かつフェライト粒のc軸の30%超、好ましくは80%超がc面に対して垂直に整列されている。
さらに別の態様において、ドープされた粒子配向性M型六方晶フェライトを製造する方法は、c面における平面磁気異方性および容易磁化、または円錐異方性を提供するのに有効なドーパントを含む、式:
MeFe12O19
(式中、Meは、Sr2+、Ba2+、またはPb2+である)の複数のフェライト粒を調製することと;フェライト粒のc軸の30%超、好ましくは80%超がc面に垂直に整列するように複数のフェライト粒を整列させて、ドープされた粒子配向性M型六方晶フェライトを提供することと;任意選択的に、ドープされた粒子配向性M型六方晶フェライトを800℃超の温度、好ましくは800~1350℃で焼結させて、理論密度の少なくとも85%、好ましくは理論密度の90%超の密度を有する焼結材料を提供することと、を含む。
MeFe12O19
と、六方晶構造において、c面における平面磁気異方性および容易磁化(即ち、容易基底面)、または容易円錐異方性を与えるのに有効なドーパントと、を有し、MeはSr2+、Ba2+またはPb2+であり、かつフェライト粒の30%超、好ましくは80%超が結晶構造のc軸に沿って、c面と垂直に整列されている。粒子配向性六方晶フェライトは、テクスチャード(textured)六方晶フェライトとも呼ばれる。
本開示の特定の粒子配向性M型六方晶フェライトには、式:Bix-Ba1-x(CoTi)yFe12-2yO19(x=0-0.8,y=0.5-1.5)、Ba(CoTi)xFe12-2xO19(x=0.5-1.5)、Ba(CoZr)xFe12-2xO19(x=0.5-1.5)、Ba(CoSn)xFe12-2xO19(x=0.5-1.5)、Ba(CoIr)xFe12-2xO19(x=0.5-1.5)、BixSr1-x(CoTi)y-Fe12-2yO19(x=0-0.8,y=0.5-1.5)、Sr(CoTi)xFe12-2xO19(x=0.5-1.5)、Sr(CoZr)xFe12-2xO19(x=0.5-1.5)、Sr(CoSn)xFe12-2xO19(x=0.5-1.5)、およびPb(CoTi)xFe12-2xO19(x=0.5-1.5)を有するフェライトが含まれる。好ましい粒子配向性M型六方晶フェライトには、式:BixBa1-x(CoTi)yFe12-2yO19,(x=0-0.8,y=0.5-1.5)、Ba(CoTi)xFe12-2xO19(x=0.5-1.5)、Ba(CoZr)xFe12-2xO19(x=0.5-1.5)、およびBa(CoSn)xFe12-2xO19,(x=0.5-1.5)を有するフェライトが含まれる。特定の粒子配向性M型六方晶フェライトは、式:(BixSryBa1-x-y)(CoTi)zFe12-2zO19(式中、xは0.05~0.5,yは0~1、そしてzは0.5~2.0である)を有する。この特定のフェライトでは、Baの一部をSrで置換する。
MeFe12O19
(式中、Meは、Sr2+、Ba2+、またはPb2+である)の複数のフェライト粒を調製することと;フェライト粒のc軸の30%超、好ましくは80%超がc面に垂直に整列するように複数のフェライト粒を整列させて、ドープされた粒子配向性M型六方晶フェライトを提供することと;任意選択的に、ドープされた粒子配向性M型六方晶フェライトを800℃超、好ましくは800~1350℃の温度で焼結させて、理論密度の少なくとも85%、好ましくは理論密度の90%超の密度を有する焼結材料を提供することと、を含む。
一態様において、単一粒子を調製することは、乾燥粉末のか焼および焼結、ゾルゲルプロセス、溶融塩プロセス、共沈プロセス、ゾルゲル水熱プロセス、水熱プロセス、または別の化学プロセスを含む。乾燥粉末のか焼/焼結は、従来のセラミックプロセスである。
態様1:粒子配向性M型六方晶フェライトであって、式:
MeFe12O19
と、六方晶構造においてc面における平面磁気異方性または円錐異方性を与えるのに有効なドーパントと、を有し、MeはSr2+、Ba2+またはPb2+であり、かつフェライト粒の30%超、好ましくは80%超が結晶構造のc軸に沿って、c面と垂直に整列されている、粒子配向性M型六方晶フェライト。
50MHz~300MHzの動作周波数にわたって50超、80超、100超、または150超の面内透磁率、
好ましくは100MHzの動作周波数において50超、80超、100超、または150超の面内透磁率;
100MHzで0.5または0.2未満、
好ましくは100MHzで0.1未満
の磁気損失正接;
0~300MHzで0.02未満、
好ましくは30~300MHzで0.03未満
の誘電損失正接;または、
30~300MHzで10~30または
300~1000MHzで6~30
の誘電率、
の少なくとも1つを有する、態様1~6のいずれか1つ以上の粒子配向性M型六方晶フェライト。
30~300MHzにわたって0.2未満、好ましくは30~300MHzにわたって0.1未満の磁気損失正接と、
30~300MHzにわたって0.05未満、好ましくは30~300MHzにわたって0.02未満の誘電損失正接と、
を有する、態様7の粒子配向性M型六方晶フェライト。
50~300MHzにわたる動作周波数で80超の面内相対透磁率と、
100MHzで0.2未満、好ましくは100MHzで0.1未満の磁気損失正接と、
を有する、態様7の粒子配向性M型六方晶フェライト。
態様13:物品は、インダクタ、垂直磁気記録、アンテナ、マイクロ波吸収体、電磁干渉抑制器、またはシールド材料である、態様12の物品。
態様15:態様1~11のいずれか1つ以上のドープされた粒子配向性M型六方晶フェライトを製造する方法であって、同方法は、
c面における平面磁気異方性およびc面における容易磁化、または容易円錐異方性を提供するのに有効なドーパントを含む、式:
MeFe12O19
(式中、Meは、Sr2+、Ba2+、またはPb2+である)の複数のフェライト粒を調製することと;
フェライト粒の30%超、好ましくは80%超が結晶構造のc軸に沿ってc面に垂直に整列するように複数のフェライト粒を整列させて、ドープされた粒子配向性M型六方晶フェライトを提供することと;
任意選択的に、ドープされた粒子配向性M型六方晶フェライトを800℃超、好ましくは800~1350℃の温度で焼結させて、理論密度の少なくとも85%、好ましくは理論密度の90%超の密度を有する焼結材料を提供することと、
を含む、方法。
態様17:単一粒子を調製することは、乾燥粉末をか焼することおよび焼結すること、ゾルゲルプロセス、溶融塩プロセス、共沈プロセス、水熱プロセス、または化学合成プロセスを含む、態様15および16のいずれか1つ以上の方法。
態様21:焼結前に、粒子配向性M型六方晶フェライトを特定の寸法に切断することを含む、態様15~20のいずれか1つ以上の方法。
Claims (10)
- 粒子配向性M型六方晶フェライトであって、式:
MeFe12O19
と、六方晶構造においてc面における平面磁気異方性および磁化、または円錐異方性を与えるのに有効なドーパントと、を有し、MeはSr2+、Ba2+またはPb2+であり、かつ
フェライト粒の30%超が結晶構造のc軸であって、前記c面と垂直なc軸に沿って整列されており、
前記ドーパントはCo 2+ /Ti 4+ 、Co 2+ /Zr 4+ 、Co 2+ /Sn 4+ 、Co 2+ /Ir 4+ 、Bi 2+ /Co 2+ /Ti 4+ 、Bi 2+ /Co 2+ /Zr 4+ 、Bi 2+ /Co 2+ /Sn 4+ 、またはそれらの組み合わせを含む、粒子配向性M型六方晶フェライト。 - 式:Bix-Ba1-x(CoTi)yFe12-2yO19(x=0-0.8,y=0.5-1.5)、Ba(CoTi)xFe12-2xO19(x=0.5-1.5)、Ba(CoZr)xFe12-2xO19(x=0.5-1.5)、Ba(CoSn)xFe12-2xO19(x=0.5-1.5)、Ba(CoIr)xFe12-2xO19(x=0.5-1.5)、BixSr1-x(CoTi)y-Fe12-2yO19(x=0-0.8,y=0.5-1.5)、Sr(CoTi)xFe12-2xO19(x=0.5-1.5)、Sr(CoZr)xFe12-2xO19(x=0.5-1.5)、Sr(CoSn)xFe12-2xO19(x=0.5-1.5)、またはPb(CoTi)xFe12-2xO19(x=0.5-1.5)を有する、請求項1に記載の粒子配向性M型六方晶フェライト。
- 式:BixBa1-x(CoTi)yFe12-2yO19(x=0-0.8,y=0.5-1.5)、Ba(CoTi)xFe12-2xO19(x=0.5-1.5)、Ba(CoZr)xFe12-2xO19(x=0.5-1.5)、またはBa(CoSn)xFe12-2xO19 (x=0.5-1.5)を有する、請求項1に記載の粒子配向性M型六方晶フェライト。
- MeはBaの一部がSrで置換されたBa2+であり、式(BixSryBa1-x-y)(CoTi)zFe12-2zO19(x=0-0.8、y=0-1、z=0.5-2.0)を有する、請求項1に記載の粒子配向性M型六方晶フェライト。
- 前記粒子配向性M型六方晶フェライトは、
50MHz~300MHzの動作周波数にわたり50超の面内透磁率;
100MHzで0.5未満の磁気損失正接;
0~300MHzにわたり0.02未満の誘電損失正接;または、
30~300MHzにわたり10~30の誘電率
の少なくとも1つを有する、請求項1に記載の粒子配向性M型六方晶フェライト。 - 前記六方晶フェライトは、理論密度の少なくとも85%の焼結密度を有する、請求項1に記載の粒子配向性M型六方晶フェライト。
- c面における粒子サイズは、300μmまでである、請求項1に記載の粒子配向性M型六方晶フェライト。
- 請求項1に記載の粒子配向性M型六方晶フェライトを含む物品。
- 請求項1に記載のドープされた粒子配向性M型六方晶フェライトを製造する方法であって、前記方法は、
c面における平面磁気異方性および磁化、または円錐異方性を提供するのに有効なドーパントを含む、式:
MeFe12O19
(式中、Meは、Sr2+、Ba2+、またはPb2+である)の複数のフェライト粒を調製することと;
前記フェライト粒の30%超が結晶構造のc軸に沿ってc面に垂直に整列するように前記複数のフェライト粒を整列させて、ドープされた粒子配向性M型六方晶フェライトを提供することと;
任意選択的に、ドープされた粒子配向性M型六方晶フェライトを800℃超の温度で焼結させて、理論密度の少なくとも85%の密度を有する焼結材料を提供することと、
を含み、
前記ドーパントはCo 2+ /Ti 4+ 、Co 2+ /Zr 4+ 、Co 2+ /Sn 4+ 、Co 2+ /Ir 4+ 、Bi 2+ /Co 2+ /Ti 4+ 、Bi 2+ /Co 2+ /Zr 4+ 、Bi 2+ /Co 2+ /Sn 4+ 、またはそれらの組み合わせを含む、方法。 - 複数の粒子を整列させることは、前記粒子に垂直の機械的圧力を加えながら回転する面内磁場を前記粒子に印加すること、磁場を印加するかまたは印加せずに前記粒子に機械的剪断力を付与すること、またはそれらの組み合わせを含み、
前記複数の粒子を整列させることは、2000Oe(159155A/m)より大きい強度を有する磁場を有する回転する面内磁場を印加することを含む、請求項9に記載の方法。
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US11691892B2 (en) | 2020-02-21 | 2023-07-04 | Rogers Corporation | Z-type hexaferrite having a nanocrystalline structure |
CN115551817A (zh) * | 2020-05-07 | 2022-12-30 | 罗杰斯公司 | 具有平面各向异性的m型六方铁氧体 |
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CN112939590B (zh) * | 2021-03-12 | 2022-10-14 | 电子科技大学 | 一种x波段准平面化器件用六角铁氧体材料及其制备方法 |
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