Compositions: ceramic – Ceramic compositions – Refractory
Patent
1990-12-20
1993-04-06
Marquis, Melvyn I.
Compositions: ceramic
Ceramic compositions
Refractory
528 33, 528 34, 528 38, 525474, 501 92, C04B 3502
Patent
active
052003710
ABSTRACT:
Organic silazane polymers are prepared by reacting a specific organic silicon compound or a mixture of organic silicon compounds with a disilazane at a temperature of 25.degree. to 350.degree. C. in an anhydrous atmosphere. The polymers are then reacted with ammonia, thereby reducing the residual halogen in the polymers. The resulting organic silazane polymers are resistant against hydrolysis and stable and thus suitable as precursors for manufacturing ceramic fibers and sheets by shaping, infusibilizing and firing.
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Hayashida Akira
Takeda Yoshihumi
Marquis Melvyn I.
Shin-Etsu Chemical Co. , Ltd.
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