Silicon nitride sintered body and a method of producing the same

Details Silicon nitride sintered body and a method of producing the same Silicon nitride sintered body and a method of producing the same

1989-08-16

1990-12-11

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 264 65, 264 66, C04B 3558

Patent

active

049771124

ABSTRACT:
A high density silicon nitride sintered body having a substantially crystallized intergranular phase and an improved mechanical strength at high temperature is produced by firing a molded body of a blend comprising Si.sub.3 N.sub.4, a sintering aid and a crystallization controlling agent selected from at least one compound of Cr, Mn, Co, Ni, Nb and Mo with a specified blending ratio.

REFERENCES:
patent: 4179301 (1979-12-01), Buljan
patent: 4264550 (1981-04-01), Ezis
patent: 4280850 (1981-07-01), Smith et al.
patent: 4332909 (1982-06-01), Nishida et al.
patent: 4388085 (1983-06-01), Savin et al.
patent: 4407970 (1983-10-01), Komatsu et al.
patent: 4511402 (1985-04-01), Mura et al.
patent: 4699890 (1987-10-01), Matsui

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