Preceramic metallopolysilanes

Details Preceramic metallopolysilanes Preceramic metallopolysilanes

C - Chemistry, Metallurgy

08

G

204/91.15, 402/7

C08G 77/60 (2006.01) C04B 35/571 (2006.01) C08G 79/00 (2006.01)

Patent

CA 1338969

A process for the preparation of preceramic metallopolysilanes is described. The process consists of reacting polysilanes with metallic compounds from which can be generated open coordination sites associated with the metallic element. Such open coordination sites can be generated by the reduction of the metallic compound with an alkali metal reducing agent or by heating a metallic compound which has thermally labile ligands or by the UV irradiation of a carbonyl-containing metallic compound. The metals which can be incorporated into the polysilane include aluminum, boron, chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium, niobium and tantalum. These metallopolysilanes are useful, when fired at high temperatures, to form metal-containing ceramic materials.

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