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Hydridosiloxanes as precursors to ceramic products

United States Patent

*** EXPIRED ***
5,635,250
June 3, 1997
View the Complete Patent at the US Patent & Trademark Office
A method is provided for preparing ceramic precursors from hydridosiloxane starting materials and then pyrolyzing these precursors to give rise to silicious ceramic materials. Si--H bonds present in the hydridosiloxane starting materials are catalytically activated, and the activated hydrogen atoms may then be replaced with nonhydrogen substituents. These preceramic materials are pyrolyzed in a selected atmosphere to give the desired ceramic product. Ceramic products which may be prepared by this technique include silica, silicon oxynitride, silicon carbide, metal silicates, and mullite.
Blum; Yigal D. (San Jose, CA), Johnson; Sylvia M. (Piedmont, CA), Gusman; Michael I. (Palo Alto, CA)
SRI International (Menlo Park, CA)
08/ 437,722
May 9, 1995
REFERENCE TO GOVERNMENT SUPPORT This invention was funded in part by the U.S. Department of Energy under Contract No. N00014-85C-0668. The United States Government has certain rights in this invention.