Method for producing silicon nitride reaction sintered body

Details Method for producing silicon nitride reaction sintered body Method for producing silicon nitride reaction sintered body

1997-10-17

1999-07-27

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

264683, C04B 3332

Patent

active

059286016

ABSTRACT:
A silicon nitride reaction-sintered body having a high mechanical strength without surface working can be produced by (1) forming a silicon powder mixture of at least two types of silicon powders having substantially independent particle size distribution ranges into a green body, the silicon powder mixture having an average particle size ranging from 5 .mu.m to 300 .mu.m; (2) heating the green body in a nitrogen-containing atmosphere for nitrogenation; and (3) sintering the nitrogenated green body at a temperature of 1900.degree. C. or higher.

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patent: 5756411 (1998-05-01), Nakahata et al.
Principles of Ceramic Processing, Second Edition, Reed. pp. 218-223, 1995.

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