Process for producing .beta.-form Si.sub.3 N.sub.4

Details Process for producing .beta.-form Si.sub.3 N.sub.4 Process for producing .beta.-form Si.sub.3 N.sub.4

1987-12-22

1989-12-19

Stoll, Robert L.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 1, 423344, 4272552, 427377, 4273977, F27B 904, B29C 6700

Patent

active

048881422

ABSTRACT:
Disclosed is a process for producing .beta.-form Si.sub.3 N.sub.4 comprising firing amorphous or .alpha.-form Si.sub.3 N.sub.4 of high chemical purity in a non-oxidizing atmosphere under an elevated pressure at a temperature of at least about 1600.degree. C., as well as a process for producing an article comprising such .beta.-form Si.sub.3 N.sub.4.

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"Densification of Si.sub.3 N.sub.4 by High Pressure Hot-Pressing", Ceramic Bulletin, vol. 60 (1981), Dec., No. 12, pp. 1281-1283.

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