JPH06116059A - Production of ceramic honeycomb - Google Patents
Production of ceramic honeycombInfo
- Publication number
- JPH06116059A JPH06116059A JP26480392A JP26480392A JPH06116059A JP H06116059 A JPH06116059 A JP H06116059A JP 26480392 A JP26480392 A JP 26480392A JP 26480392 A JP26480392 A JP 26480392A JP H06116059 A JPH06116059 A JP H06116059A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic powder
- ceramic
- ceramic honeycomb
- water
- green body
- 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
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
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば触媒担体、加湿
用保水体、消臭材担体等に用いられるセラミックハニカ
ムの製法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a ceramic honeycomb used as, for example, a catalyst carrier, a humidifying water retainer, a deodorant carrier and the like.
【０００２】[0002]
【従来の技術】従来より、セラミックハニカムの材料と
して、ムライト、アルミナ、コージライトが用いられ、
自動車の排ガスを浄化する触媒を担持する担体、工場の
排気ガスを浄化する触媒を担持する担体、消臭剤を担持
する担体等の分野で賞用されているが、触媒の担持能力
や臭気の吸着能力の向上のため、より触媒を担持する担
体として空隙率、及び比表面積の高いセラミックハニカ
ムが求められている。2. Description of the Related Art Conventionally, mullite, alumina and cordierite have been used as materials for ceramic honeycombs.
It is widely used in the fields of carriers that carry catalysts that purify automobile exhaust gases, carriers that carry catalysts that purify factory exhaust gases, carriers that carry deodorants, etc. In order to improve the adsorption capacity, a ceramic honeycomb having a high porosity and a high specific surface area is required as a carrier for supporting a catalyst.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上述の事実に
鑑みてなされたもので、その目的とするところは、比表
面積、及び空隙率の高いセラミックハニカムの製法を提
供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and an object thereof is to provide a method for manufacturing a ceramic honeycomb having a high specific surface area and a high porosity.
【０００４】[0004]
【課題を解決するための手段】本発明に係るセラミック
ハニカムの製法は、焼結性を有するセラミック粉末、焼
成により燃焼、または上記セラミック粉末と反応するマ
イクロバルーン、及びバインダーとして寄与する水溶性
有機化合物を構成材料とした、透孔を有するグリーン体
を焼成することを特徴とする。A method for manufacturing a ceramic honeycomb according to the present invention comprises a ceramic powder having sinterability, microballoons which are burnt by firing or react with the ceramic powder, and a water-soluble organic compound serving as a binder. A green body having a through hole, which is made of the above material, is fired.
【０００５】[0005]
【作用】本発明によると、セラミック粉末、マイクロバ
ルーン、及びバインダーとして寄与する水溶性有機化合
物を構成材料としたグリーン体を、セラミック粉末が焼
結する高温で焼成すると、水溶性有機化合物は燃焼とと
もに消失し、さらにマイクロバルーンは燃焼、またはセ
ラミック粉末との反応により消失する。このマイクロバ
ルーンの消失によりセラミックハニカムの母体内に空隙
が形成される。According to the present invention, when a green body composed of ceramic powder, microballoons, and a water-soluble organic compound that contributes as a binder is fired at a high temperature at which the ceramic powder sinters, the water-soluble organic compound is burned. In addition, the microballoons disappear by burning or reacting with the ceramic powder. Due to the disappearance of the microballoons, voids are formed in the matrix of the ceramic honeycomb.
【０００６】以下、本発明を詳細に説明する。本発明の
製法において用いられるグリーン体（５）は、図１
（ａ）に示す如く、相対立する面に連通する多数の透孔
（４）を有する。このグリーン体（５）は焼結性を有す
るセラミック粉末、焼成により燃焼、または上記セラミ
ック粉末と反応するマイクロバルーン（２）、及びバイ
ンダーとして寄与する水溶性有機化合物を構成材料とす
る。The present invention will be described in detail below. The green body (5) used in the production method of the present invention is shown in FIG.
As shown in (a), it has a large number of through holes (4) communicating with the opposing surfaces. The green body (5) comprises, as constituent materials, ceramic powder having sinterability, microballoons (2) that burn or react with the ceramic powder by firing, and a water-soluble organic compound that contributes as a binder.
【０００７】上記セラミック粉末は焼結性を有する、例
えば、ムライト、アルミナ、コージライト等のセラミッ
クの粉末、またはタルク、水酸化アルミニウム、カオリ
ン等の混合物等を用いる。As the above-mentioned ceramic powder, for example, ceramic powder having sinterability such as mullite, alumina, cordierite, or a mixture of talc, aluminum hydroxide, kaolin, etc. is used.
【０００８】上記マイクロバルーン（２）は、セラミッ
ク粉末が焼結する高温で焼成すると、燃焼、または上記
セラミック粉末との反応で消失する性質を有する。この
マイクロバルーン（２）は、粒径が数μｍ〜数１０μｍ
の大きさのものを用いると、得られるセラミックハニカ
ムの比表面積を高めるので、保水体として用いる場合に
は、特にセラミックハニカムに毛細管現象を生じさせ、
その結果保水効果を高める点で有効である。マイクロバ
ルーン（２）の材料としては、例えば、アルミナ、珪酸
ガラス、フェノール樹脂、ポリ塩化ビニリデン、エポキ
シ樹脂、尿素樹脂等が挙げられる。The microballoons (2) have the property of disappearing when burned or reacting with the ceramic powder when fired at a high temperature at which the ceramic powder sinters. This microballoon (2) has a particle size of several μm to several tens of μm.
If the size of is used, the specific surface area of the obtained ceramic honeycomb is increased, so that when it is used as a water retainer, a capillary phenomenon is caused particularly in the ceramic honeycomb,
As a result, it is effective in enhancing the water retention effect. Examples of the material of the microballoon (2) include alumina, silicate glass, phenol resin, polyvinylidene chloride, epoxy resin, urea resin and the like.
【０００９】上記水溶性有機化合物は上記セラミック粉
末とマイクロバルーン（２）のバインダーとして用いら
れ、グリーン体（５）の形状を保持する。この水溶性有
機化合物の材料としては、例えばメチルセルロース、グ
リセリン、でんぷん、小麦粉、ポリビニルアルコール、
ポリアクリル酸アミド等が挙げられ、これらの単一また
は複合で用いられる。The water-soluble organic compound is used as a binder for the ceramic powder and the microballoons (2) and maintains the shape of the green body (5). The material of the water-soluble organic compound, for example, methyl cellulose, glycerin, starch, wheat flour, polyvinyl alcohol,
Examples thereof include polyacrylic acid amide and the like, and these are used alone or in combination.
【００１０】上述のグリーン体（５）は上記セラミック
粉末、マイクロバルーン（２）、及び水溶性有機化合物
に水を添加し、混練、成形、乾燥することにより得られ
る。この成形方法は特に限定されず、例えば、押出成
形、射出成形等が上げられる。The green body (5) is obtained by adding water to the ceramic powder, the microballoons (2) and the water-soluble organic compound, kneading, molding and drying. This molding method is not particularly limited, and examples thereof include extrusion molding and injection molding.
【００１１】本発明の製法は、上記透孔（４）を有する
グリーン体（５）を焼成する。このグリーン体（５）を
焼成する温度は、用いられるセラミック粉末の焼結温度
により適宜決定される。焼成の方法は特に限定され、こ
の焼結温度で焼成するとマイクロバルーン（２）は消失
して、図１（ｂ）に示す如く空隙（３）を有するセラミ
ックハニカム（１）が得られる。In the manufacturing method of the present invention, the green body (5) having the through holes (4) is fired. The temperature for firing the green body (5) is appropriately determined depending on the sintering temperature of the ceramic powder used. The firing method is not particularly limited. When firing at this sintering temperature, the microballoons (2) disappear and the ceramic honeycomb (1) having the voids (3) is obtained as shown in FIG. 1 (b).
【００１２】[0012]
【実施例】以下、本発明の実施例および比較例を挙げ
る。EXAMPLES Examples and comparative examples of the present invention will be given below.
【００１３】実施例１ セラミック粉末として、タルク３５重量部（以下部と記
す）、水酸化アルミニウム１５部、カオリン３０部と、
マイクロバルーン（２）として粒径５〜１０μｍのアル
ミナバルーンを１０部、及び水溶性有機化合物として、
メチルセロソルブ６部、グリセリン２部、でんぷん２部
に水１０部を添加して、セラミック成形材料とした。こ
の成形材料を混練し、押出成形により相対立する面に連
通する多数の透孔（４）を有するグリーン体（５）を得
た。このグリーン体（５）を１４００℃で５時間焼成
し、セラミックハニカム（１）を得た。Example 1 As a ceramic powder, 35 parts by weight of talc (hereinafter referred to as "part"), 15 parts of aluminum hydroxide and 30 parts of kaolin,
As a microballoon (2), 10 parts of an alumina balloon having a particle size of 5 to 10 μm, and as a water-soluble organic compound,
10 parts of water was added to 6 parts of methyl cellosolve, 2 parts of glycerin, and 2 parts of starch to prepare a ceramic molding material. This molding material was kneaded, and extrusion molding was carried out to obtain a green body (5) having a large number of through holes (4) communicating with opposed surfaces. This green body (5) was fired at 1400 ° C. for 5 hours to obtain a ceramic honeycomb (1).
【００１４】実施例２〜４ 実施例１と材料の種類、配合割合を表１の示す条件とし
た以外は、実施例１と同様にしてセラミックハニカム
（１）を得た。Examples 2 to 4 Ceramic honeycombs (1) were obtained in the same manner as in Example 1 except that the types of materials and the mixing ratios were changed to those shown in Table 1.
【００１５】実施例１〜４で得られた、セラミックハニ
カム（１）の空隙率と比表面積を測定し、従来のコージ
ライトを用いたハニカムと比較した。その結果、従来の
コージライトを用いたハニカムに対し、空隙率は実施例
１が１．５倍、実施例２が３倍、実施例３が２倍、実施
例４が２倍であり、比表面積は実施例１〜４とも１．５
倍であった。The porosity and specific surface area of the ceramic honeycombs (1) obtained in Examples 1 to 4 were measured and compared with a conventional honeycomb using cordierite. As a result, the porosity of Example 1 was 1.5 times, Example 2 was 3 times, Example 3 was 2 times, and Example 4 was 2 times that of the conventional honeycomb using cordierite. The surface area is 1.5 in each of Examples 1 to 4.
It was double.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【発明の効果】本発明の製法によると、焼成により透孔
（４）を有するグリーン体（５）に含有されたマイクロ
バルーン（２）が消失し、焼結体に空隙（３）が形成さ
れ、比表面積が高いセラミックハニカム（１）が得られ
る。According to the manufacturing method of the present invention, the microballoons (2) contained in the green body (5) having the through holes (4) disappear by firing and voids (3) are formed in the sintered body. A ceramic honeycomb (1) having a high specific surface area can be obtained.
【図１】（ａ）は本発明の製法において用いるグリーン
体の一例を示す斜視図、（ｂ）は本発明の製法において
得られるセラミックハニカムの斜視図である。1A is a perspective view showing an example of a green body used in the manufacturing method of the present invention, and FIG. 1B is a perspective view of a ceramic honeycomb obtained in the manufacturing method of the present invention.
１ セラミックハニカム ２ マイクロバルーン ３ 空隙 ４ 透孔 ５ グリーン体 1 Ceramic Honeycomb 2 Micro Balloon 3 Void 4 Through Hole 5 Green Body
Claims (1)
より燃焼、または上記セラミック粉末と反応するマイク
ロバルーン、及びバインダーとして寄与する水溶性有機
化合物を構成材料とした、透孔を有するグリーン体を焼
成することを特徴とするセラミックハニカムの製法。1. A green body having pores, which comprises a ceramic powder having sinterability, a microballoon that burns upon firing or reacts with the ceramic powder, and a water-soluble organic compound that contributes as a binder. A method of manufacturing a ceramic honeycomb characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26480392A JPH06116059A (en) | 1992-10-02 | 1992-10-02 | Production of ceramic honeycomb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26480392A JPH06116059A (en) | 1992-10-02 | 1992-10-02 | Production of ceramic honeycomb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06116059A true JPH06116059A (en) | 1994-04-26 |
Family
ID=17408437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26480392A Pending JPH06116059A (en) | 1992-10-02 | 1992-10-02 | Production of ceramic honeycomb |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06116059A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0712821A1 (en) * | 1994-11-16 | 1996-05-22 | NGK Spark Plug Co. Ltd. | Porous ceramic material and producing method of same, and valve unit |
| JP2002356384A (en) * | 2001-06-01 | 2002-12-13 | Asahi Glass Co Ltd | Silicon carbide based porous compact and method of manufacturing the same |
| WO2003082771A1 (en) * | 2002-03-29 | 2003-10-09 | Ngk Insulators, Ltd. | Porous material and method for production thereof |
| WO2003082772A1 (en) * | 2002-03-29 | 2003-10-09 | Ngk Insulators, Ltd. | Method for producing cordierite-based porous material |
| JPWO2003082770A1 (en) * | 2002-03-29 | 2005-08-04 | 日本碍子株式会社 | Silicon carbide based porous material and method for producing the same |
-
1992
- 1992-10-02 JP JP26480392A patent/JPH06116059A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0712821A1 (en) * | 1994-11-16 | 1996-05-22 | NGK Spark Plug Co. Ltd. | Porous ceramic material and producing method of same, and valve unit |
| JP2002356384A (en) * | 2001-06-01 | 2002-12-13 | Asahi Glass Co Ltd | Silicon carbide based porous compact and method of manufacturing the same |
| WO2003082771A1 (en) * | 2002-03-29 | 2003-10-09 | Ngk Insulators, Ltd. | Porous material and method for production thereof |
| WO2003082772A1 (en) * | 2002-03-29 | 2003-10-09 | Ngk Insulators, Ltd. | Method for producing cordierite-based porous material |
| JPWO2003082770A1 (en) * | 2002-03-29 | 2005-08-04 | 日本碍子株式会社 | Silicon carbide based porous material and method for producing the same |
| US7250384B2 (en) | 2002-03-29 | 2007-07-31 | Ngk Insulators, Ltd. | Method for producing cordierite-based porous material |
| US7473464B2 (en) | 2002-03-29 | 2009-01-06 | Ngk Insulators, Ltd. | Porous material and method for production thereof |
| US8092740B2 (en) | 2002-03-29 | 2012-01-10 | Ngk Insulators, Ltd. | Method of manufacturing a porous material |
| US8173054B2 (en) | 2002-03-29 | 2012-05-08 | Ngk Insulators, Ltd. | Silicon carbide based porous material and method for production thereof |
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