Method for producing shaped articles of ceramics

Details Method for producing shaped articles of ceramics Method for producing shaped articles of ceramics

1988-02-16

1989-10-10

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 82, 501 95, C04B 3332

Patent

active

048730394

ABSTRACT:
Forming a shaped article of polysilazane, contacting this shaped article with dry ammonia at a temperature of 20.degree.-200.degree. C. to thereby effect infusibilization, and finally subjecting the ammonia-treated product to further heat treatment at a higher temperature in a nitrogen atmosphere to thereby produce a shaped ceramic article.

REFERENCES:
patent: 3853567 (1974-12-01), Verbeek
patent: 4097294 (1978-06-01), Rice et al.
patent: 4172108 (1979-10-01), Maeda
patent: 4543344 (1985-09-01), Cannady
patent: 4937828 (1983-08-01), Seyferth et al.
Seyferth et al., "A Liquid Silazane Precurser to Silicon Nitride", in Communications of the American Ceramic Society, Jan. 1983.
Penn et al., J. Appl. Poly. Sci., 27, pp. 3751-3761.
Okamura et al., 187th Nat. Meeting. Am. Chem. Soc., Apr. 1984.
"Ultrastructure Processing of Ceramics, Glasses, & Composites", John Wiley & Sons, 1984.

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