Process for the production of silicon carbide by the pyrolysis o

Details Process for the production of silicon carbide by the pyrolysis o Process for the production of silicon carbide by the pyrolysis o

1985-05-28

1986-12-23

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

501 88, C01B 3136

Patent

active

046311793

ABSTRACT:
Silicon carbide production by pyrolysis of polycarbosilane polymers formed by prior art methods is fraught with defects. These can be obviated by utilizing as the polycarbosilane polymer, a poly(silmethylene) formed by polymerizing 1,3-disilacyclobutane with a ring-opening catalyst of a Group VIII element of atomic number 44 or above, preferably a Pt-containing catalyst, in an inert liquid medium and under an inert atmosphere. At pyrolysis temperatures of at least about 900.degree. C., silicon carbride in a crystalline state is formed. The poly(silmethylene) may be molded or shaped into various forms such as fibers before being subjected to the pyrolysis.

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Curtis L. Schilling, Jr., "Polycarbosilane Precursors for Silicon Carbide", Ceramic Bulletin, vol. 62, No. 8, 1983, pp. 912-915.

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