Method of sintering articles of silicon nitride

Details Method of sintering articles of silicon nitride Method of sintering articles of silicon nitride

1988-01-27

1990-03-13

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 67, 501 97, 501 98, C04B 3558

Patent

active

049081713

ABSTRACT:
A novel method of sintering Si.sub.3 N.sub.4 shaped bodies which method comprises grinding Si.sub.3 N.sub.4 with the use of a grinding material down to a surface area magnitude of 10.5 to 35 m.sup.2 /g and an average particle size from 0.2 to 0.005 .mu.m, shaping the powder obtained, and sintering the compact under inert gas or nitrogen at a temperature from 1700.degree. to 1900.degree. C.

REFERENCES:
patent: 3992497 (1976-11-01), Terwilliger et al.
patent: 4073845 (1978-02-01), Buljan et al.
patent: 4087500 (1978-05-01), Fisher et al.
patent: 4143107 (1979-03-01), Ishii et al.
patent: 4225356 (1980-09-01), Prochazka et al.
Stanley, "Attrition Milling of Ceramic Oxides," Ceramic Bulletin, vol. 53, o. 11 (1974), pp. 813-815.
Herbell, "Effect of Dry Attrition Milling on the Reaction Sintering of Silicon Nitride", Ceramic Bulletin, vol. 58, No. 12, (1979), pp. 1172-1184.
Akunov, "Grinding of Hard Materials in Jet Mills" Glass & Ceramics, pp. 668-670.
Crisi, "Selecting Balls and Liners for Grinding Mills," Chemical Engineering, Sep. 7, 1981, pp. 127-129.

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