JPH0645499B2 - Manufacturing method of honeycomb ceramics - Google Patents
Manufacturing method of honeycomb ceramicsInfo
- Publication number
- JPH0645499B2 JPH0645499B2 JP1056851A JP5685189A JPH0645499B2 JP H0645499 B2 JPH0645499 B2 JP H0645499B2 JP 1056851 A JP1056851 A JP 1056851A JP 5685189 A JP5685189 A JP 5685189A JP H0645499 B2 JPH0645499 B2 JP H0645499B2
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb
- honeycomb structure
- binder
- drying
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は寸法精度に優れたハニカム状セラミックスを生
産性よく製造する方法に関し、本発明によって得られる
ハニカム状セラミックスは触媒担体用基体あるいはその
他一般構造材として使用される。TECHNICAL FIELD The present invention relates to a method for producing a honeycomb-shaped ceramic having excellent dimensional accuracy with high productivity. The honeycomb-shaped ceramic obtained by the present invention is a catalyst carrier substrate or other general structural material. Used as.
従来の技術 従来、触媒担体用基体としては一般に押出成形から得た
ハニカム状セラミックスが広く用いられており、この製
造方法は、一般にセラミックス粉末に、適当量の成形助
剤と水とを加え、混練し、押出成形後、非常に長時間を
かけた乾燥、焼成工程を経て得るものであった。2. Description of the Related Art Conventionally, honeycomb ceramics generally obtained by extrusion molding have been widely used as a substrate for a catalyst carrier, and this manufacturing method generally involves adding an appropriate amount of a molding aid and water to a ceramic powder and kneading the mixture. However, after extrusion molding, it was obtained through a drying and firing process that took a very long time.
発明が解決しようとする課題 従来の製造方法では押出成形後、風乾するのが一般的で
あった。そのために必要条件として、セラミックス粉末
としてすべり性に優れたものを選び、混練後の成形材料
にはできるだけ添加する水分量を減らし堅めで調合する
様努めてきた。[Problems to be Solved by the Invention] In the conventional manufacturing method, air-drying was generally performed after extrusion molding. Therefore, as a necessary condition, we have tried to select a ceramic powder having excellent slipperiness and to mix it with the molding material after kneading with as little water content as possible.
しかし、現実には押出成形後の風乾中に発生するある程
度の型くずれは仕方のないことと考えられてきた。However, in reality, it has been considered that there is no choice but to lose the mold shape that occurs during air-drying after extrusion molding.
したがって、このような従来の製造方法では、ハニカム
状セラミックスに優れた寸法精度を維持させながら、短
時間に生産するのは困難であり、そのため生産コストの
低減を図るのも困難であった。Therefore, with such a conventional manufacturing method, it is difficult to manufacture honeycomb ceramics in a short time while maintaining excellent dimensional accuracy, and thus it is also difficult to reduce the manufacturing cost.
課題を解決するための手段 本発明は上記問題点を解消するために、原料となる無機
材料粉末に、ある温度以上になるとゲル化する性質を有
する結合剤を添加し、ハニカム状に押出成形した後、前
記結合剤がゲル化する温度以上であるとともに、界面活
性剤を含んでなる熱水中に浸漬し、ハニカム構造体を保
形させ、その後、乾燥、焼成することを特徴とする。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention adds a binder having a property of gelling at a certain temperature or more to an inorganic material powder as a raw material and extruded into a honeycomb shape. After that, the temperature is higher than the temperature at which the binder gels, and the honeycomb structure is shaped by being immersed in hot water containing a surfactant, and then dried and fired.
また、結合剤はメチルセルロース、ヒドロキシプロピル
メチルセルロースよりなる群から選ぶのが好ましい。Further, the binder is preferably selected from the group consisting of methyl cellulose and hydroxypropyl methyl cellulose.
また、ハニカム構造体の乾燥には誘電加熱を使用すると
良く、さらにハニカム構造体の乾燥を貫通孔側から温風
を送りながら、誘電加熱を併用して行うことよい。In addition, it is preferable to use dielectric heating for drying the honeycomb structure, and it is also preferable to dry the honeycomb structure by using dielectric heating while sending warm air from the through hole side.
また、ハニカム構造体がＳｉＯ２ ８０〜９０ｗｔ％、
Ａｌ２Ｏ３ ５〜１８ｗｔ％、ＴｉＯ２ ２〜６ｗｔ
％、Ｋ２Ｏ ０．４〜１．５ｗｔ％の組成を有すること
が好ましい。In addition, the honeycomb structure has a SiO 2 content of 80 to 90 wt%,
Al 2 O 3 5-18 wt%, TiO 2 2-6 wt
%, K 2 O 0.4 to 1.5 wt%.
作 用 上記構成によると、結合剤がゲル化する温度以上にした
熱水中に、押出成形したハニカム構造体を直ちに浸漬
し、結合剤をゲル化させることにより、ハニカム構造体
にある程度の機械的強度が得られ、型くずれ等の問題を
回避できる。しかし、この時、ハニカム構造体の開口率
が小さかったり、長さが長かったりすると、結合剤をゲ
ル化させるのに時間を要してしまい、ハニカム構造体の
格子に歪み、型くずれ等を発生させたしまう。したがっ
て、この結合剤のゲル化を促進させるために熱水中に界
面活性剤を添加すると、ハニカム構造体と水との湿潤
性、浸透性が改善される。その結果、ハニカム構造体を
熱水中に投入すると瞬時に含水し、結合剤のゲル化速度
を速めることができ、ハニカム構造体の保形性を向上さ
せることができる。また、寸法精度に優れたハニカム状
セラミックスを得ることができる。Operation According to the above-mentioned configuration, the extruded honeycomb structure is immediately immersed in hot water whose temperature is equal to or higher than the temperature at which the binder gels, and the binder is gelled, so that the honeycomb structure is mechanically bonded to a certain degree. Strength can be obtained, and problems such as mold deformation can be avoided. However, at this time, if the aperture ratio of the honeycomb structure is small or the length is long, it takes time to gel the binder, and the lattice of the honeycomb structure is distorted, causing mold deformation and the like. I'll lose it. Therefore, when a surfactant is added to hot water to promote gelation of the binder, the wettability and permeability of the honeycomb structure and water are improved. As a result, when the honeycomb structure is put into hot water, it immediately contains water, and the gelation rate of the binder can be increased, and the shape retention of the honeycomb structure can be improved. Further, it is possible to obtain a honeycomb ceramic having excellent dimensional accuracy.
また、成形材料中に使用する結合剤にセルロース系のメ
チルセルロース、ヒドロキシプロピルメチルセルロース
よりなる群から選ばれたものを使用すると、押出成形の
成形性、可塑性にも効果を発揮しながら、本発明の目的
とするゲル化工程という点においても約６０〜９０℃と
いう広い範囲においてゲル化温度を選択でき、ゲル化さ
せるための媒体としても水という安価なものを使用でき
るので生産コスト低減にも有効である。When a binder selected from the group consisting of cellulosic methylcellulose and hydroxypropylmethylcellulose is used as the binder used in the molding material, the moldability of extrusion molding and the effect on the plasticity can be achieved while the object of the present invention. The gelling temperature can be selected in a wide range of about 60 to 90 ° C. in terms of the gelling step, and water can be used as a medium for gelling, which is inexpensive, which is effective in reducing the production cost. .
また、乾燥に誘電加熱を使用すると、次のような特徴が
ある。Further, the use of dielectric heating for drying has the following characteristics.
・加熱効率が高く、乾燥時間の短縮ができる。・ High heating efficiency, shortening drying time.
・複雑な形状のものでも比較的均一な乾燥ができる。・ Comparable shapes can be dried relatively uniformly.
・電波による加熱であるからエネルギー制御に遅れがな
い。・ There is no delay in energy control because it is heated by radio waves.
・被乾燥物のみ昇温し炉壁を加熱することがない。・ Only the material to be dried is heated and the furnace wall is not heated.
したがって、本発明の目的とするハニカム構造体のよう
な複雑な形状のものでも、結合剤のゲル化により、ハニ
カム構造体を保形させた後、均一な乾燥が短時間で実行
でき、生産性が向上する。Therefore, even if the honeycomb structure has a complicated shape such as the object of the present invention, uniform drying can be performed in a short time after the honeycomb structure is held in shape by gelation of the binder, and productivity is improved. Is improved.
本発明で用いる無機材料粉末としては、シリカ、アルミ
ナ、チタニア、ジルコニア、カオリン、タルク、ムライ
ト、アルカリあるいはアルカリ土類のチタン酸塩、コー
ジライト、炭化珪素、窒化珪素等を用いることができ
る。しかし、乾燥方法に誘電加熱方式を使用する場合に
は誘電体損失係数の小さな無機材料粉末（例えば溶融シ
リカ）を主成分とすることが好ましい。その理由は、誘
電加熱でハニカム構造体中の水分にマイクロ波が選択的
に吸収、加熱され、蒸発した後も、ハニカム構造体が部
分的に異常加熱される事がないので、乾燥が均一に行わ
れ、ハニカム構造体に亀裂、ひび割れが生じにくいため
である。As the inorganic material powder used in the present invention, silica, alumina, titania, zirconia, kaolin, talc, mullite, alkali or alkaline earth titanates, cordierite, silicon carbide, silicon nitride and the like can be used. However, when the dielectric heating method is used as the drying method, it is preferable to use an inorganic material powder having a small dielectric loss coefficient (for example, fused silica) as a main component. The reason is that even if microwaves are selectively absorbed by the moisture in the honeycomb structure by dielectric heating, heated and evaporated, the honeycomb structure is not partially abnormally heated, so that the drying is uniform. This is because the honeycomb structure is hardly cracked or cracked.
したがって、本発明の目的とする触媒担体用基体あるい
はその他一般構造材として使用するために必要な機械的
強度を有するハニカム状セラミックスを製造するために
は、ハニカム構造体がＳｉＯ２ ８０〜９０ｗｔ％、Ａ
ｌ２Ｏ３ ５〜１８ｗｔ％、ＴｉＯ２ ２〜６ｗｔ％、
Ｋ２Ｏ ０．４〜１．５ｗｔ％の組成を有することが好
ましい。この組成のセラミックスは耐熱衝撃性と機械的
強度の両面に優れており、またＳｉＯ２を主成分として
いるので誘電加熱方式を使用してもハニカム構造体に亀
裂、ひび割れをおこすことなく製造できる。Therefore, in order to manufacture a honeycomb ceramics having a mechanical strength required for use as a catalyst carrier substrate or other general structural material, which is the object of the present invention, the honeycomb structure has a SiO 2 content of 80 to 90 wt%, A
l 2 O 3 5~18wt%, TiO 2 2~6wt%,
It is preferable to have a composition of K 2 O 0.4 to 1.5 wt%. The ceramic of this composition is excellent in both thermal shock resistance and mechanical strength, and since it contains SiO 2 as a main component, it can be manufactured without causing cracks or cracks in the honeycomb structure even if the dielectric heating method is used.
本発明で用いる結合剤はある温度以上になると急激にゲ
ル化するものである。具体的には、セルロースエーテル
系のもので、メチルセルロース、メチルエチルセルロー
ス、ヒドロキシプロピルメチルセルロース等があげられ
る。これらは冷水には溶けて粘ちょうな溶液となるが、
熱水には溶けずゲル化する性質を持ったものである。た
とえば、メトローズ６０ＳＨ−４０００（信越化学工
業、商品名）の場合、室温の水には溶けるが、６０℃以
上ではゲル化がおこる。これにより、ハニカム構造体の
保形性が維持される。The binder used in the present invention rapidly gels above a certain temperature. Specifically, it is a cellulose ether type, and examples thereof include methyl cellulose, methyl ethyl cellulose, and hydroxypropyl methyl cellulose. These dissolve in cold water to form a viscous solution,
It does not dissolve in hot water and gels. For example, in the case of Metroze 60SH-4000 (trade name of Shin-Etsu Chemical Co., Ltd.), it dissolves in water at room temperature, but gelation occurs at 60 ° C. or higher. Thereby, the shape retention of the honeycomb structure is maintained.
実施例 以下、本発明の実施例について説明する。Examples Examples of the present invention will be described below.
（実施例１） 再水和性アルミナを１０重量部、溶融シリカを８５重量
部、チタン酸カリウムを５重量部と結合剤としてメトロ
ーズ６０ＳＨ−４０００（信越化学工業、商品名）を７
重量部混合し、その後適量の水を加え湿式混練した後、
ハニカム状に押出成形し、１０５ｍｍφ、長さ１５３ｍ
ｍ、セル密度が３００セル／ｉｎ２（セルピッチ１．５
ｍｍ，リブ厚０．２０ｍｍ）の第１図に示すようなハニ
カム構造体を得た。その後、第２図に示す工程に基づい
て、アニオン系界面活性剤（ジ・オクチル・スルホ・コ
ハク酸ナトリウム）が０．１ｗｔ％含まれる９０℃の熱
水中に１分間浸漬し、結合剤（メトローズ６０ＳＨ−４
０００）をゲル化させた。ここで、結合剤をゲル化させ
るのに必要な所用時間の目安としてはハニカム構造体を
熱水中に浸漬し、気泡が出なくなるまでと考えた。(Example 1) 10 parts by weight of rehydrated alumina, 85 parts by weight of fused silica, 5 parts by weight of potassium titanate and 7 parts of METOLOSE 60SH-4000 (trade name, Shin-Etsu Chemical Co., Ltd.) as a binder.
After mixing by weight, after adding an appropriate amount of water and wet kneading,
Extruded into a honeycomb shape, 105mmφ, length 153m
m, cell density 300 cells / in 2 (cell pitch 1.5
mm, rib thickness 0.20 mm) to obtain a honeycomb structure as shown in FIG. After that, based on the process shown in FIG. 2, it is immersed for 1 minute in 90 ° C. hot water containing 0.1 wt% of anionic surfactant (sodium dioctyl sulfo succinate), and the binder ( METOLOSE 60SH-4
000) was gelled. Here, it was considered that the honeycomb structure was immersed in hot water until bubbles disappeared as a guide for the time required to gel the binder.
その後、ハニカム構造体を熱水から引き上げ、約１５０
℃の温風を０．５ｋｇ／ｃｍ2で送り、格子中に残留し
ている余分な水分を除去した。その後、１２０℃、２時
間の熱処理を行い、充分な乾燥が行われた後、ハニカム
構造体を徐々に１２０℃まで焼成して１時間ホールド
し、ハニカム状セラミックスを得た。After that, the honeycomb structure is pulled out from the hot water, and about 150
The excess water remaining in the grid was removed by sending warm air of 0.5 ° C. at 0.5 kg / cm 2 . After that, heat treatment was performed at 120 ° C. for 2 hours, and after sufficient drying, the honeycomb structure was gradually fired to 120 ° C. and held for 1 hour to obtain a honeycomb ceramic.
その結果、ハニカム状セラミックスには型くずれなく、
優れた寸法精度を維持させることができた。As a result, the honeycomb-shaped ceramics will not lose its shape,
It was possible to maintain excellent dimensional accuracy.
さらに、本実施例では界面活性剤としてアニオン系界面
活性剤（ジ・オクチル・スルホ・コハク酸ナトリウム）
を使用したが、特にこれに限定されることなく、カチオ
ン系、ノニオン系のものでも同様な効果が確認された。
しかし、添加量を最も少なくして効果を発揮できるのは
アニオン系界面活性剤であった。また、添加量はそれぞ
れの場合によって異なるが、水体０．１〜２．０ｗｔ％
含まれる熱水中であれば本発明の効果が期待できた。Further, in this example, an anionic surfactant (sodium di-octyl-sulfo-succinate) was used as the surfactant.
However, the same effect was confirmed with a cation type or nonionic type, without being limited to this.
However, it was an anionic surfactant that was most effective when the amount added was minimized. In addition, the amount of addition varies depending on the case, but the water body is 0.1 to 2.0 wt%.
The effect of the present invention could be expected if the contained hot water.
また、上記実施例１の場合には、結合剤を５〜１０重量
部添加するのが望ましいことがわかった。その理由は、
結合剤が５重量部以下では熱水中でゲル化させても充分
な強度が得られない。また、１０重量部以上添加しても
ほとんど差はなく、製造コストの点からも好ましくな
い。Also, in the case of the above Example 1, it was found that it is desirable to add 5 to 10 parts by weight of the binder. The reason is,
When the amount of the binder is 5 parts by weight or less, sufficient strength cannot be obtained even when gelled in hot water. Further, even if added in an amount of 10 parts by weight or more, there is almost no difference, which is not preferable in terms of manufacturing cost.
また、ハニカム構造体を浸漬する熱水の温度は結合剤を
有するゲル化温度によって異なるが、大体結合剤の有す
るゲル化温度よりも少なくても１０℃以上高温の熱水に
浸漬させないと充分な機械的強度の得られないことがわ
かった。Further, the temperature of the hot water for immersing the honeycomb structure depends on the gelling temperature of the binder, but it is sufficient to immerse the honeycomb structure in hot water of 10 ° C. or higher even if it is lower than the gelling temperature of the binder. It was found that mechanical strength could not be obtained.
（比較例１） 実施例１と同様なハニカム構造体を押出成形で得た後、
９０℃の熱水中に４分間浸漬し、結合剤（メトローズ６
０ＳＨ−４０００）をゲル化させた。その後、ハニカム
構造体を熱水から引き上げ、約１５００℃の温風を０．
５ｋｇ／ｃｍ2で送り、格子中に残留している余分な水
分を除去した。その後、１２０℃、２時間の熱処理を行
い、充分な乾燥が行われた後、徐々に１２００℃まで焼
成して１時間ホールドし、ハニカム状セラミックスを得
た。(Comparative Example 1) After a honeycomb structure similar to that of Example 1 was obtained by extrusion molding,
Immerse in hot water at 90 ° C. for 4 minutes, and then bond with
0SH-4000) was gelled. Then, the honeycomb structure was pulled out from the hot water, and warm air of about 1500 ° C. was added to the water.
The excess water remaining in the grid was removed by feeding at 5 kg / cm 2 . Then, heat treatment was carried out at 120 ° C. for 2 hours, and after sufficient drying, it was gradually burned to 1200 ° C. and held for 1 hour to obtain a honeycomb ceramic.
その結果、ハニカム状セラミックスには中心部に格子の
歪みを生じた。その理由としては、本ハニカム構造体の
ようなセル密度が高く、長さの長いものの場合、結合剤
をゲル化させるのに時間がかかりすぎ、なかなか中心部
まで熱水が浸入して行きにくいためと考えられる。As a result, lattice distortion occurred in the central part of the honeycomb ceramics. The reason is that in the case where the honeycomb structure has a high cell density and a long length, it takes too long to gel the binder, and it is difficult for hot water to penetrate to the center. it is conceivable that.
（比較例２） 実施例１と同様なハニカム構造体を押出成形で得た後、
１２０℃、２時間の熱処理を行い、充分な乾燥が行われ
た後、徐々に１２００℃まで焼成して１時間ホールド
し、ハニカム状セラミックスを得た。(Comparative Example 2) After a honeycomb structure similar to that of Example 1 was obtained by extrusion molding,
After heat treatment at 120 ° C. for 2 hours and sufficient drying, it was gradually burned to 1200 ° C. and held for 1 hour to obtain a honeycomb ceramic.
その結果、ハニカム状セラミックスにはかなり型くずれ
があった。具体的には、乾燥時に自重で下部の径が少し
大きくなっていた。また、下部ハニカム格子にも少し格
子のよれが生じていた。As a result, the honeycomb-shaped ceramic was considerably deformed. Specifically, the diameter of the lower part was slightly increased due to its own weight during drying. In addition, the lower honeycomb lattice was also slightly distorted.
（実施例２） 実施例１と同様なハニカム構造体を押し出し成形で得た
後、アニオン系界面活性剤（ジ・オクチル・スルホ・コ
ハク酸ナトリウム）が０．１ｗｔ％含まれる９０℃の熱
水中に１分間浸漬し、結合剤（メトローズ６０ＳＨ−４
０００）をゲル化させた。その後、ハニカム構造体を熱
水から引き上げ、約１５０℃の温風を０．５ｋｇ／ｃｍ
2で送り、格子中に残留している余分な水分を除去し
た。その後、出力１．５ｋｗ、２４５０ＭＨｚの誘電加
熱装置で８分間乾燥を行い、充分な乾燥が行われた後、
ハニカム構造体を徐々に１２００℃まで焼成して１時間
ホールドし、ハニカム状セラミックスを得た。(Example 2) A honeycomb structure similar to that of Example 1 was obtained by extrusion molding, and then hot water at 90 ° C containing 0.1 wt% of an anionic surfactant (sodium di-octyl-sulfo-succinate). Soak for 1 minute in the binder (Metroze 60SH-4
000) was gelled. After that, the honeycomb structure is pulled out from the hot water, and warm air at about 150 ° C. is added to 0.5 kg / cm.
It was sent at 2 to remove excess water remaining in the lattice. After that, it was dried for 8 minutes with a dielectric heating device with an output of 1.5 kw and 2450 MHz, and after sufficient drying,
The honeycomb structure was gradually fired to 1200 ° C. and held for 1 hour to obtain a honeycomb ceramic.
その結果、ハニカム状セラミックスには型くずれなく、
優れた寸法精度を維持させることができた。また、本実
施例では乾燥に誘電加熱を使用することにより、実施例
１における乾燥時間を大幅に短縮できた。As a result, the honeycomb-shaped ceramics will not lose its shape,
It was possible to maintain excellent dimensional accuracy. Further, in the present embodiment, by using dielectric heating for drying, the drying time in Example 1 could be greatly shortened.
（実施例３） 実施例１と同様なハニカム構造体を押し出し成形で得た
後、アニオン系界面活性剤（ジ・オクチル・スルホ・コ
ハク酸ナトリウム）が０．１ｗｔ％含まれる９０℃の熱
水中に１分間浸漬し、結合剤（メトローズ６０ＳＨ−４
０００）をゲル化させた。その後、ハニカム構造体を熱
水から引き上げ、約１５０℃の温風を０．５ｋｇ／ｃｍ
2で送り、格子中に残留している余分な水分を除去し
た。その後、出力１．５ｋｗ、２４５０ＭＨｚの誘電加
熱装置で、貫通孔側から約１２０℃の温風を送りながら
５分間乾燥を行い、充分な乾燥が行われた後、ハニカム
構造体を徐々に１２００℃まで焼成して１時間ホールド
し、ハニカム状セラミックスを得た。(Example 3) A honeycomb structure similar to that of Example 1 was obtained by extrusion molding, and then hot water at 90 ° C containing 0.1 wt% of an anionic surfactant (sodium di-octyl-sulfo-succinate). Soak for 1 minute in the binder (Metroze 60SH-4
000) was gelled. After that, the honeycomb structure is pulled out from the hot water, and warm air at about 150 ° C. is added to 0.5 kg / cm.
It was sent at 2 to remove excess water remaining in the lattice. Then, with a dielectric heating device with an output of 1.5 kw and 2450 MHz, drying was performed for 5 minutes while sending warm air of about 120 ° C. from the through hole side, and after sufficient drying was performed, the honeycomb structure was gradually heated to 1200 ° C. The mixture was fired and held for 1 hour to obtain a honeycomb ceramic.
その結果、ハニカム状セラミックスには型くずれのな
く、優れた寸法精度を維持させることができた。また、
本実施例では乾燥に誘電加熱と温風を併用することによ
り、実施例２よりもさらに乾燥時間を短縮できた。As a result, it was possible to maintain excellent dimensional accuracy without losing the shape of the honeycomb ceramics. Also,
In this example, by using dielectric heating and warm air together for drying, the drying time could be further shortened as compared with Example 2.
発明の効果 本発明によれば、ある温度以上になるとゲル化する結合
剤を用い、熱水中に界面活性剤を含ませたことにより、
従来問題となっていた型くずれを解決でき、寸法精度に
優れたハニカム状セラミックスを生産性よく製造するこ
とができた。EFFECTS OF THE INVENTION According to the present invention, by using a binder that gels at a certain temperature or higher, and by including a surfactant in hot water,
It was possible to solve the problem of mold collapse, which was a problem in the past, and to manufacture honeycomb ceramics with excellent dimensional accuracy with good productivity.
第１図は本発明の一実施例の製造方法にて得られたハニ
カム状セラミックスの外観図、第２図は同実施例１の製
造工程図である。FIG. 1 is an external view of a honeycomb ceramic obtained by a manufacturing method according to an embodiment of the present invention, and FIG. 2 is a manufacturing process drawing of the same embodiment 1.
Claims (5)
になるとゲル化する性質を有する結合剤を添加し、ハニ
カム状に押出成形した後、界面活性剤を含み前記結合剤
がゲル化する温度以上の、熱水中に浸漬し、ハニカム構
造体を保形させ、その後、乾燥、焼成することを特徴と
するハニカム状セラミックスの製造方法。1. A binder, which has a property of gelling at a certain temperature or higher, is added to an inorganic material powder as a raw material, and the mixture is extruded into a honeycomb shape. Then, the binder is gelled by containing a surfactant. A method for manufacturing a honeycomb-shaped ceramics, which comprises immersing the honeycomb structure in hot water at a temperature or higher to retain its shape, followed by drying and firing.
ロピルメチルセルロースよりなる群から選ばれたもので
あることを特徴とする請求項１記載のハニカム状セラミ
ックスの製造方法。2. The method for producing a honeycomb-shaped ceramic according to claim 1, wherein the binder is selected from the group consisting of methylcellulose and hydroxypropylmethylcellulose.
ることを特徴とする請求項１または２記載のハニカム状
セラミックスの製造方法。3. The method for producing a honeycomb-shaped ceramic according to claim 1, wherein dielectric heating is used for drying the honeycomb structure.
風を送りながら誘電加熱を併用して行うことを特徴とす
る請求項３記載のハニカム状セラミックスの製造方法。4. The method for manufacturing a honeycomb-shaped ceramic according to claim 3, wherein the honeycomb structure is dried by using dielectric heating while sending warm air from the through hole side.
ｗｔ％、Ａｌ２Ｏ３ ５〜１８ｗｔ％、ＴｉＯ２ ２〜
６ｗｔ％、Ｋ２Ｏ ０．４〜１．５ｗｔ％の組成を有す
ることを特徴とする請求項１、２、３または４記載のハ
ニカム状セラミックスの製造方法。5. A honeycomb structure comprising SiO 2 80-90.
wt%, Al 2 O 3 5~18wt %, TiO 2 2~
The method for manufacturing a honeycomb-shaped ceramic according to claim 1, 2, 3, or 4, wherein the composition has a composition of 6 wt% and K 2 O 0.4 to 1.5 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1056851A JPH0645499B2 (en) | 1989-03-08 | 1989-03-08 | Manufacturing method of honeycomb ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1056851A JPH0645499B2 (en) | 1989-03-08 | 1989-03-08 | Manufacturing method of honeycomb ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02233551A JPH02233551A (en) | 1990-09-17 |
| JPH0645499B2 true JPH0645499B2 (en) | 1994-06-15 |
Family
ID=13038918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1056851A Expired - Fee Related JPH0645499B2 (en) | 1989-03-08 | 1989-03-08 | Manufacturing method of honeycomb ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0645499B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646537A (en) | 2007-03-28 | 2010-02-10 | 日本碍子株式会社 | Method of drying honeycomb molding |
| WO2008117624A1 (en) * | 2007-03-28 | 2008-10-02 | Ngk Insulators, Ltd. | Method of drying honeycomb molding, and drying apparatus therefor |
-
1989
- 1989-03-08 JP JP1056851A patent/JPH0645499B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02233551A (en) | 1990-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS58204868A (en) | Ceramic formed body | |
| US3952083A (en) | Silica reusable surface insulation | |
| JP2505261B2 (en) | Ceramic heat exchanger and manufacturing method thereof | |
| JP2008508172A (en) | Method for obtaining porous ceramics | |
| JP4215936B2 (en) | Manufacturing method of honeycomb structure | |
| TWI430975B (en) | Composition for ceramic extrusion-molded body and method for manufacturing a ceramic extrusion-molded body | |
| WO1999028268A1 (en) | Method for firing ceramic honeycomb bodies | |
| US4812424A (en) | Kiln furniture for the firing of ceramic articles | |
| JP4311609B2 (en) | Method for producing porous ceramic body | |
| US5385699A (en) | Method for producing a honeycomb shaped ceramic | |
| JPH0225876B2 (en) | ||
| JPH0645499B2 (en) | Manufacturing method of honeycomb ceramics | |
| JP2574472B2 (en) | Manufacturing method of honeycomb ceramics | |
| JP2002160976A (en) | Method for manufacturing ceramic honeycomb structure | |
| EP1551777B1 (en) | Method for preparation of bulk shaped foam articles | |
| JPS5930761A (en) | Ceramic composition for extrusion formation | |
| JP2651170B2 (en) | Ceramics porous body | |
| JP3202945B2 (en) | Method for firing ceramic honeycomb structure | |
| JPH0645500B2 (en) | Manufacturing method of honeycomb ceramics | |
| CN103804007A (en) | In-situ synthesis mullite whisker-toughened ceramic heat accumulator and preparation method thereof | |
| JPH10115396A (en) | Manufacture of core material for vacuum insulation structure | |
| JP3816376B2 (en) | Method for producing lightweight porous sintered body | |
| KR100407661B1 (en) | Fabrication method of complex-shape refractory material using aluminosilicate fiber | |
| KR100379744B1 (en) | Process for Preparing Porous Silicon Carbide Body Employing Methylcellulose Polymer Containing Forming Agent | |
| JPH05221743A (en) | Porous ceramic acoustic material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |