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Process for SiBCN based preceramic polymers and products derivable therefrom

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
A method of forming SiBCN-based preceramic polymers or oligomers reacts a disilazane having the general formula (R.sub.3Si).sub.2NH, where R is selected from the group consisting of vinyl, hydrogen, phenyl, and alkyls containing 1 to 3 carbon atoms with a boron halide including at least two halides, and a halosilane including at least two halogens at a temperature of between 125 C and 300 C. Upon partial pyrolysis, a partially pyrolyzed preceramic polymer or oligomer useful for burnable poison rod assemblies and spent fuel containers can be formed which provides hydrothermal stability and includes at least 3 wt % hydrogen.
Lee, Jongsang (Gainesville, FL), Baney, Ronald Howard (Gainesville, FL)
10/ 716,369
November 18, 2003
[0002] The U.S. Government has certain rights to this invention pursuant to Grant/Contract No. #DE-FG07-011D-14117 from the Department of Energy (DOE).