Silicon nitride-containing ceramics

Details Silicon nitride-containing ceramics Silicon nitride-containing ceramics

1984-07-02

1985-08-13

Morgenstern, Norman

Coating processes

Heat decomposition of applied coating or base material

264 295, 264 296, 264 292, 427228, 427255, 4272554, 427341, 427399, 428428, 428689, 428699, 525474, 525475, 525477, B05D 302

Patent

active

045350078

ABSTRACT:
What is disclosed is a process for preparing a silicon nitride-containing ceramic material from a R.sub.3 SiNH-containing silazane polymer, which has been rendered infusible by treatment with certain reactive metal halides, by heating the infusible silazane polymer to an elevated temperature under an inert atmosphere. Suitable reactive metal halides are of the general formula MX.sub.n or R.sub.b SiX.sub.(4-b) where M is a metal atom of valence n, X is chlorine or bromine, R is selected from the group consisting of vinyl, hydrogen, phenyl, and alkyl radicals containing 1 to 3 carbon atoms, and b has a value of 0, 1, or 2. Preferred reactive metal halides are SiCl.sub.4 and HSiCl.sub.3.

REFERENCES:
patent: 4122220 (1978-10-01), Sussmuth
patent: 4267211 (1981-05-01), Yajima et al.
patent: 4312970 (1982-01-01), Gaul
patent: 4340619 (1982-07-01), Gaul
patent: 4395460 (1983-07-01), Gaul

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