Polymetalosilazane, process of producing same, silicon nitride based ceramic, and process of preparing same

摘要

A preceramic polymetalosilazane substantially free of Si-O groups is produced by reacting a polysilazane with a metal alkoxide in the presence of an alkylsilazane or alkylsilane. The preceramic polymer gives a high strength and heat resistant ceramic body which remains amorphous when calcined at 1,600 DEG C. for 10 hours in the atmosphere of nitrogen.