Method of producing silicon-nitride-based sintered body

Details Method of producing silicon-nitride-based sintered body Method of producing silicon-nitride-based sintered body

1989-02-14

1992-06-16

Lusignan, Michael

Compositions: ceramic

Ceramic compositions

Refractory

4273762, 4273761, 427355, 4273977, 264 60, 264 61, 264 62, 501 96, C04B 3558, B05D 302

Patent

active

051224860

ABSTRACT:
Silicon-nitride-based sintered body is produced by a primary sintering; applying a paste-like coating, in which a surface-homogenizing agent is at least one kind of inorganic constituents selected from the group consisting of C, Bn, AlN and Si.sub.3 N.sub.4 provided that C is present at least 5% by weight of the inorganic constituents, on a primary sintered body; and subsequently performing a secondary sintering under a pressure higher than that at the primary sintering.

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patent: 4462817 (1984-07-01), Wolfe et al.
patent: 4462818 (1984-07-01), Wolfe et al.
patent: 4692288 (1987-09-01), Rossmann et al.
patent: 4812272 (1989-03-01), Heinrich et al.
patent: 4853204 (1989-08-01), Azuma et al.

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