Process for the production of ceramic material containing silico

Details Process for the production of ceramic material containing silico Process for the production of ceramic material containing silico

1989-07-18

1991-12-24

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

264 65, 501 95, 501 96, 525474, C04B 3558

Patent

active

050752669

ABSTRACT:
The invention relates to a process for the production of ceramic material containing silicon nitride, such as fibers, coatings or moldings. In this process, polymeric hydridochlorosilazanes are rendered infusible at a temperature below their softening point by treatment with gaseous NH.sub.3 and are then pyrolyzed in an atmosphere containing NH.sub.3 at 700.degree. to 1500.degree. C. Fibers, coatings or moldings containing silicon nitride are produced by first producing appropriate structures from a melt of the polymeric hydridochlorosilazane and then rendering them infusible and pyrolyzing them.

REFERENCES:
patent: 3853567 (1974-12-01), Verbeek
patent: 3892583 (1975-07-01), Winter et al.
patent: 4535007 (1985-08-01), Cannady
patent: 4743662 (1988-05-01), Lipowitz
patent: 4757035 (1988-07-01), Baney et al.
patent: 4771118 (1988-09-01), Takamizawa et al.
patent: 4833107 (1989-05-01), Kaya et al.
R. R. Wills et al., Ceramic Bulletin 62:904-915 (1983).
World Patent Index Latest Database, Nr. 87-287383, 1987.

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