Sinterable Si.sub.3 N.sub.4 powder and a process for its prepara

Details Sinterable Si.sub.3 N.sub.4 powder and a process for its prepara Sinterable Si.sub.3 N.sub.4 powder and a process for its prepara

1987-05-22

1989-07-04

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 423406, C04B 3558

Patent

active

048450600

ABSTRACT:
Sinterable Si.sub.3 N.sub.4 powder having an average particle size of less than 1 .mu.m, wherein no individual particle has a diameter greater than 100 .mu.m, the total content of metallic impurities of the powder is less than 1000 ppm and the iron content is less than 200 ppm is produced by grinding agglomerated Si.sub.3 N.sub.4 in a spiral jet mill.

REFERENCES:
patent: 4124402 (1978-11-01), Greskovich et al.
patent: 4602743 (1986-07-01), Nied
patent: 4643859 (1987-02-01), Mitomo et al.
Science of Ceramic Chemical Processing, ed. by Hench and Ulrich, Wiley, New York, 1986, p. 539 ff.

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