Silicon nitride coated clays and method of preparation

Details Silicon nitride coated clays and method of preparation Silicon nitride coated clays and method of preparation

1987-10-29

1989-03-07

Herbert, Thomas J.

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Surface property or characteristic of web, sheet or block

4272481, 427255, 428404, 428698, 523216, 523508, B32B 516, C23C 1600

Patent

active

048105805

ABSTRACT:
A modified clay mineral, such as a kaolin clay, is disclosed in which nitridation of the silicon atoms of the clay has been effected. This may be accomplished by reaction of the clay with NH.sub.3 at temperatures above 1000.degree. C.

REFERENCES:
patent: 3567680 (1971-03-01), Iannicelli
patent: 4336304 (1982-06-01), Landingham et al.
patent: 4412018 (1983-10-01), Finlayson et al.
patent: 4522958 (1985-06-01), Das et al.
patent: 4690868 (1987-09-01), Rice
R. K. Brow et al., "Thermochemical Nitridation of Microporous Silica Films in Ammonia", Journal of the American Ceramic Society, vol. 70, No. 1, Jan. 1987, pp. 9-14.
Choi et al., "Synthesis of .beta.'-Sialon with Various Compositions from Kaolin", Jul. 4, 1986, pp. 1-12.

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