Method for producing .alpha.-form silicon nitride

Details Method for producing .alpha.-form silicon nitride Method for producing .alpha.-form silicon nitride

1986-10-20

1988-02-09

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423406, C01B 21068

Patent

active

047241314

ABSTRACT:
A method for producing .alpha.-form silicon nitride having a central particle diameter of 0.3 to 1.0 .mu.m (.alpha.-Si.sub.3 N.sub.4) of high-grade and fine powder for its sintered body excellent in heat-stability and mechanical strength which comprises heat-treating at 1,450.degree.-1,550.degree. C., in an atmosphere containing nitrogen, a mixture prepared by adding one of additives:

REFERENCES:
Journal of the Ceramic Association, Japan, 85 [11], 537-542 (1977), with English Abstract.
J. Am. Ceram. Soc., 65 (12) C-205 (1982).
Journal of Materials Science 10 (1975), pp. 1243-1246.

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