Sinterable ceramic powder, process for its production, silicon n

Details Sinterable ceramic powder, process for its production, silicon n Sinterable ceramic powder, process for its production, silicon n

1990-03-23

1992-11-10

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

C04B 3558

Patent

active

051622726

ABSTRACT:
The invention relates to a novel sinterable ceramic powder, to its preparation and to its further processing to give a silicon nitride ceramic, and to this material itself and its use. The sinterable ceramic powder is produced by melting a polysilazane or dissolving it in an organic solvent, suspending a powdered sinter aid in this melt or solution, then pyrolyzing the melt, or the residue obtained after evaporation of the solvent, at 500.degree. to 1600.degree. C. in a protective gas atmosphere, the polysilazane either

REFERENCES:
patent: 3853567 (1974-12-01), Verbeek
patent: 3892583 (1975-07-01), Winter et al.
patent: 4869854 (1989-09-01), Takeda et al.
Saiki, G. et al, Chem. Abs. 108:172382r (1988).
Schwartz, K. B. et al, Advanced Ceramic Materials 3, 320-323 (1988).
Saiki, G. et al (II), Chem. Abs. 110:14358n (1989).

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