Aluminum nitride powder and process for preparation of the same

Details Aluminum nitride powder and process for preparation of the same Aluminum nitride powder and process for preparation of the same

1989-10-04

1991-09-17

Langel, Wayne A.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Binary compound

501 96, C01B 21072, C04B 3558

Patent

active

050493671

ABSTRACT:
An aluminum nitride powder obtained by firing and reacting a mixture of alumina and carbon in a nitrogen-containing atmosphere is disclosed, the aluminum nitride powder having an oxygen content of not more than 2.0% by weight, an iron content of not more than 20 ppm, a silicon content of not more than 100 ppm, and a titanium content of not more than 20 ppm and having has a tapped density of at least 1.0 g/cm.sup.3. An aluminum nitride powder containing from 0.01% to 10% by weight of a sintering aid is also disclosed, the aluminum nitride powder having an oleophilic surface and having a tapped density of at least 1.0 g/cm.sup.3. The aluminum nitride powder of the present invention has excellent moldability, has a high tapped density, is less in formation of coagulated particles, and has a sharp particle size distribution.

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Chemical Abstracts, vol. 108, No. 12, Mar. 1988, Ref. No. 97244.
Chemical Abstracts, vol. 108, No. 16, Apr. 18, 1988, Ref. No. 136540g.

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