Silicon nitride ceramic article

Details Silicon nitride ceramic article Silicon nitride ceramic article

1988-06-06

1990-02-20

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, C04B 3550, C04B 3558

Patent

active

049026534

ABSTRACT:
A sintered silicon nitride ceramic article excelling in high-temperature strength and experiencing only an insignificant decline of strength at elevated temperatures particularly up to 1,300.degree. C. is produced by firing a ceramic mixture composed of not more than 10% by weight of the oxide of a rare earth element, not more than 10% by weight of at least one member selected from the group consisting of oxides, carbides, and silicides respectively of Hf, Ta, and Nb, optionally not more than 10% by weight of aluminum nitride, and the balance being silicon nitride.

REFERENCES:
patent: 4511525 (1985-04-01), Tsuge et al.
patent: 4705761 (1987-11-01), Kosugi

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