Process for producing silicon nitride sintered material

Details Process for producing silicon nitride sintered material Process for producing silicon nitride sintered material

1991-06-19

1993-01-12

Bell, Mark L.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, 501 92, 501 97, C04B 3558

Patent

active

051788098

ABSTRACT:
Powders of carbides are mixed with a silicon nitride powder and powders of rare earth element oxides to obtain a mixture. The mixture is shaped and fired in a casing in a nitrogen atmosphere of 1,700.degree.-2,100.degree. C. under the conditions specified by the following formula:

REFERENCES:
patent: 4264548 (1981-04-01), Ezis
patent: 4457958 (1984-07-01), Lange et al.
patent: 4814301 (1989-03-01), Steinmann et al.
patent: 4830800 (1989-05-01), Thomas et al.
patent: 4891342 (1990-01-01), Yokoyama
patent: 4997797 (1991-03-01), Hanzawa
Patent Abstracts of Japan, vol. 014, No. 423 (C-757) Sep. 12, 1990 & JP-A-2 160 669 (Mitsubishi Gas Chem Co Inc), Jun. 20, 1990.

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