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

1996-05-20

1998-03-31

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

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

Introducing material under pressure into mold

264656, 264657, 264658, 264673, C04B 3332, B28B 124

Patent

active

057334986

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.

REFERENCES:
patent: 4701106 (1987-10-01), Sasaki
patent: 4713206 (1987-12-01), Matsuhisa et al.
patent: 5055432 (1991-10-01), Edler et al.
patent: 5126294 (1992-06-01), Hirosaki et al.

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