Silicon nitride-containing ceramics

Details Silicon nitride-containing ceramics Silicon nitride-containing ceramics

C - Chemistry, Metallurgy

01

B

23/195

C01B 21/068 (2006.01) C04B 35/589 (2006.01) C08G 77/62 (2006.01)

Patent

CA 1227016

SILICON NITRIDE-CONTAINING CERAMICS ABSTRACT What is disclosed is a process for preparing a silicon nitride-containing ceramic material from a R3SiNH-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 MXn or Rb SiX(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 SiCl4 and HSiCl3.

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