Claims
- 1. A method for producing a cordierite body comprising the sequential steps of:
- (1) preparing a first batch material having an average particle diameter of from about 1 to about 50 microns consisting essentially in weight percent of 33.98 to 42.05% kaolin mineral particles, 14.74 to 18.24% raw talc particles, 14.74 to 18.25% fired talc particles
- produced by delaminating pulverized, layered raw talc along (001) Plane into plate-shaped particles then firing said plate-shaped particles, and at least one of aluminum hydroxide or alumina, the batch material having substantially the same composition ratio as the theoretical composition ratio for cordierite;
- (2) adding to the batch material prepared in step (1) from about 1 to about 20 weight percent of preformed cordierite particles having substantially the same composition as that of the batch material and having an average particle diameter of from about 1 to about 50 microns,
- said preformed cordierite particles being prepared by mixing together and kneading a second batch material, consisting essentially of kaolin mineral particles, raw talc particles and at least one of aluminum hydroxide or alumina, into a slurry, forming said slurry into a formed body, drying and firing the formed body to form synthetic cordierite, then pulverizing the synthetic cordierite into cordierite particles;
- (3) mixing and kneading the batch material and preformed cordierite particles together to form a slurry;
- (4) anisostatically forming said batch into a formed body of the desired shape; and
- (5) drying and firing said formed body,
- the resulting cordierite body having a coefficient of thermal expansion which is nearly equal and is .ltoreq.15.0.times.10.sup.-7 /.degree.C. in the range of 25.degree. to 1,000.degree. C. in all directions.
- 2. The method according to claim 1, in which said performed cordierite particles are prepared by firing said formed body at a temperature from about 1,300.degree. C. to about 1,420.degree. C.
- 3. The method according to claim 1, in which the amount of said preformed cordierite particles added in step (2) is about 1.0 to about 10 weight %.
- 4. A catalyst support made of the cordierite body produced by the method of claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
55-149535 |
Oct 1980 |
JPX |
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CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of our earlier application Ser. No. 275,509 filed June 19, 1981, now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
Country |
Parent |
275509 |
Jun 1981 |
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