JPH05132374A - Ceramic hollow article and its production - Google Patents
Ceramic hollow article and its productionInfo
- Publication number
- JPH05132374A JPH05132374A JP31960491A JP31960491A JPH05132374A JP H05132374 A JPH05132374 A JP H05132374A JP 31960491 A JP31960491 A JP 31960491A JP 31960491 A JP31960491 A JP 31960491A JP H05132374 A JPH05132374 A JP H05132374A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- fine fibers
- organic fine
- molding
- raw material
- 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.)
- Pending
Links
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Inorganic Fibers (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、微細な孔を有するセラ
ミック中空体とその製法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic hollow body having fine pores and a method for producing the same.
【0002】[0002]
【従来の技術】セラミック成形体に細孔を設けること
は、パイプやフィルター等を作るために欠かせない技術
である。従来の技術は比較的径の大きい細孔の場合、押
出し加工を採用して中空体を作るとか、或いは、スリッ
プキャスト法で中子を用い中空体を作る。2. Description of the Related Art Providing pores in a ceramic molded body is an essential technique for producing pipes, filters and the like. In the conventional technique, in the case of pores having a relatively large diameter, extrusion processing is used to form a hollow body, or a hollow body is formed using a core by a slip casting method.
【0003】押出し加工やスリップキャスト法を用いて
セラミック中空体を作る場合、細孔を設けることは不可
能である。細孔の形成手段としては、粒子を結合させそ
の間に細孔を作る考え、粒子に結合材をコーティング
し、焼成凝着させて細孔を作る考え、製造過程で固体を
熱処理或いは化学処理し一部の成分を気化又は溶出させ
て固体内部に細孔を作る考え等に基づくものが提案され
ている。When a ceramic hollow body is produced by extrusion or slip casting, it is impossible to provide pores. As a means for forming pores, it is considered that particles are bound to form pores between them, the particles are coated with a binder, and the particles are baked and coagulated to form pores. There is proposed a method based on the idea of vaporizing or eluting a component of a part to form pores inside a solid.
【0004】前述した従来の細孔を作る考えは、しか
し、成形体中にランダムに存在する空隙としての細孔で
あって、連続した一本の細孔としては存在しない。技術
の多用化に伴い、セラミック成形体に連続した形の細孔
を設けることが要求されているにも抱らず、これ迄実用
可能な技術が提案されていない。The above-mentioned idea of forming conventional pores, however, is pores that are randomly present in the molded body and do not exist as one continuous pore. With the diversification of technology, it has been required to provide continuous pores in the ceramic molded body, but no practical technology has been proposed so far.
【0005】[0005]
【発明が解決しようとする課題】それ故に、本発明は前
述した従来技術の欠点を解消し、連続した細孔を有する
セラミック中空体とその製法を提供することを解決すべ
き課題とする。Therefore, it is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide a ceramic hollow body having continuous pores and a method for producing the same.
【0006】[0006]
【課題を解決するための手段】本発明は、前述した課題
を解決するために、セラミック成形体に埋込んだ有機系
細繊維を焼成するという基本的手段を用いる。In order to solve the above-mentioned problems, the present invention uses a basic means of firing organic fine fibers embedded in a ceramic molded body.
【0007】より具体的には、本発明は原料粉末を成形
したセラミック成形体、該成形体内に埋込まれた有機系
細繊維とよりなり該有機系細繊維を焼成して使用するセ
ラミック中空体を提供する。More specifically, the present invention comprises a ceramic molded body obtained by molding a raw material powder, and an organic fine fiber embedded in the molded body, and a ceramic hollow body used by firing the organic fine fiber. I will provide a.
【0008】さらに、本発明は、セラミック用原料粉末
中に有機系細繊維を埋込むこと、該原料粉末を成形して
セラミック成形体を作ること、該成形体を加熱して有機
系細繊維を焼成することよりなるセラミック中空体の製
法を提供する。Further, according to the present invention, the organic fine fibers are embedded in the ceramic raw material powder, the raw material powder is molded into a ceramic compact, and the compact is heated to form the organic fine fiber. Provided is a method for producing a ceramic hollow body which comprises firing.
【0009】[0009]
【作用】本発明の方法は、プレス成形法、スリップキャ
スト法、押出し成形法等のいずれの成形法も採用できる
が、いずれの方法においても、そのセラミックの成形体
を形成する際に、有機系の細繊維を埋込みし、そのまま
焼成する。その際、有機系細繊維が分解燃焼して除去さ
れ、成形体に中空部が形成されることで、中空部を有す
るセラミック成形体を得る。即ち、一般にセラミック成
形体は、1000℃以上の高温で焼成されて作られるも
のである。これに対して、有機系繊維は、その分解燃焼
温度は高々500℃程度であるから、成形体の焼成時に
埋込んだ有機系繊維は容易に除去できるものである。従
って、本方法では埋込んだ繊維を除去する後工程が不要
である特徴を持つ。In the method of the present invention, any molding method such as press molding method, slip casting method and extrusion molding method can be adopted. Embed the fine fibers and burn as it is. At this time, the organic fine fibers are decomposed and burned to be removed, and a hollow portion is formed in the molded body, whereby a ceramic molded body having a hollow portion is obtained. That is, generally, a ceramic molded body is manufactured by firing at a high temperature of 1000 ° C. or higher. On the other hand, since the decomposition and combustion temperature of the organic fiber is about 500 ° C. at most, the organic fiber embedded at the time of firing the molded body can be easily removed. Therefore, this method has a feature that a post-process for removing the embedded fibers is unnecessary.
【0010】本発明は、成形体に有機系細繊維を埋込む
場合に該繊維を蛇行させたり、スパイラル状にしたりす
ることができ、従来の方法では困難であった蛇行した貫
通孔やスパイラル状の貫通孔を形成できる特徴を有す。According to the present invention, when an organic fine fiber is embedded in a molded body, the fiber can be made to meander or have a spiral shape, and the meandering through-hole or spiral shape, which was difficult by the conventional method. The feature is that it can form through holes.
【0011】[0011]
【実施例】図1に示すように、押出し成形機1の先端ノ
ズル2の中心位置に線径10μmのナイロン繊維3をセ
ットして、セルロース系バインダーを混ぜたアルミナ粉
4を押出し、アルミナ粉4とナイロン繊維3の摩擦力
で、ナイロン繊維3が押出し成形体5と一緒に押出され
るようにして、ナイロン繊維が埋込まれた直径0.5m
mのセラミックの成形体を作り、これを1500℃の大
気中雰囲気で焼成した。この結果得られた成形体にはナ
イロン繊維の消失により約9μmの直径の貫通孔が形成
されていた。EXAMPLE As shown in FIG. 1, a nylon fiber 3 having a wire diameter of 10 μm was set at the center of a tip nozzle 2 of an extrusion molding machine 1, and an alumina powder 4 mixed with a cellulosic binder was extruded to obtain an alumina powder 4 The frictional force between the nylon fiber 3 and the nylon fiber 3 causes the nylon fiber 3 to be extruded together with the extruded molded body 5 to have a diameter of 0.5 m in which the nylon fiber is embedded.
A ceramic molded body of m was prepared and was fired in the atmosphere at 1500 ° C. in the air. The resulting molded product had through holes with a diameter of about 9 μm formed due to the disappearance of nylon fibers.
【0012】図2に示すように、プレス金型6にアルミ
ナ粉7を半分だけ充填してプレスし、ダイ8を外して、
圧粉体の表面に線径20μmのポリエステル繊維9を蛇
行させてセットし、その上に残り半分のアルミナ10分
を充填しプレスし、繊維9を埋込んだ直方体の圧粉体を
得た。この圧粉体を、1500℃の大気中雰囲気で焼成
した。この結果、中心部に直径約17μmの蛇行した貫
通孔を有する成形体を得ることができた。As shown in FIG. 2, the pressing die 6 is filled with half of the alumina powder 7 and pressed, and the die 8 is removed.
A polyester fiber 9 having a wire diameter of 20 μm was set on the surface of the green compact in a meandering manner, and the remaining half of the alumina was filled for 10 minutes and pressed to obtain a rectangular parallelepiped green powder in which the fiber 9 was embedded. This green compact was fired in the atmosphere at 1500 ° C. in the air. As a result, it was possible to obtain a molded product having a meandering through hole having a diameter of about 17 μm in the center.
【0013】[0013]
【効果】本発明によれば、セラミック成形過程中に、所
望の径、形状、数の細孔をセラミック体に設けることが
できるので、応用範囲を拡大できる。According to the present invention, since pores having a desired diameter, shape and number can be provided in the ceramic body during the ceramic forming process, the range of application can be expanded.
【図1】本発明の方法の一例を示す断面図である。FIG. 1 is a cross-sectional view showing an example of the method of the present invention.
【図2】本発明の別の例を示す斜視図である。FIG. 2 is a perspective view showing another example of the present invention.
2 押出しノズル 3 ナイロン繊維 4 アルミナ粉 5 成形体 6 金型 2 Extrusion nozzle 3 Nylon fiber 4 Alumina powder 5 Molded body 6 Mold
Claims (3)
該成形体内に埋込まれた有機系細繊維とよりなり、該有
機系細繊維を焼成して使用するセラミック中空体。1. A ceramic compact formed by molding a raw material powder,
A ceramic hollow body made of organic fine fibers embedded in the molded body, and used by firing the organic fine fibers.
を埋込むこと、該原料粉末を成形してセラミック成形体
を作ること、該成形体を加熱して有機系細繊維を焼成す
ることよりなるセラミック中空体の製法。2. By embedding organic fine fibers in a ceramic raw material powder, molding the raw material powder to make a ceramic compact, and heating the compact to fire the organic fine fibers. To make a hollow ceramic body.
請求項2の製法。3. The method according to claim 2, wherein the organic fine fibers have a diameter of 20 μm or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31960491A JPH05132374A (en) | 1991-11-08 | 1991-11-08 | Ceramic hollow article and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31960491A JPH05132374A (en) | 1991-11-08 | 1991-11-08 | Ceramic hollow article and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05132374A true JPH05132374A (en) | 1993-05-28 |
Family
ID=18112130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31960491A Pending JPH05132374A (en) | 1991-11-08 | 1991-11-08 | Ceramic hollow article and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05132374A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009017141A1 (en) * | 2007-07-31 | 2009-02-05 | Hokuriku Seikei Industrial Co., Ltd. | Nozzle member and process for producing the same |
-
1991
- 1991-11-08 JP JP31960491A patent/JPH05132374A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009017141A1 (en) * | 2007-07-31 | 2009-02-05 | Hokuriku Seikei Industrial Co., Ltd. | Nozzle member and process for producing the same |
KR101157528B1 (en) * | 2007-07-31 | 2012-06-22 | 도쿄엘렉트론가부시키가이샤 | Nozzle member and process for producing the same |
JP5119253B2 (en) * | 2007-07-31 | 2013-01-16 | 北陸成型工業株式会社 | Nozzle member and manufacturing method thereof |
US8858864B2 (en) | 2007-07-31 | 2014-10-14 | Tokyo Electron Limited | Nozzle member and process for producing the same |
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