Process for producing sinterable crystalline aluminum nitride po

Details Process for producing sinterable crystalline aluminum nitride po Process for producing sinterable crystalline aluminum nitride po

1991-05-31

1992-05-05

Langel, Wayne A.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Binary compound

501 96, C01B 21072

Patent

active

051105756

ABSTRACT:
Sinterable crystalline aluminum nitride powder is produced by reacting alkyl aluminum with ammonia in a gas phase to produce an amorphous aluminum nitride presursor powder, and subjecting the precursor powder to a primary calcination in a reducing gas containing at least 20% (vol.) ammonia at 600.degree. C. to 1300.degree. C., and then subjecting the calcined aluminum nitride to a secondary calination in an inert gas or a reducing gas at 1400.degree.-1750.degree. C.

REFERENCES:
patent: 4783430 (1988-11-01), Su
patent: 4869925 (1989-09-01), Hiai et al.
Interrante et al., "Studies of Organometallic Precursors to Aluminum Nitride", paper presented at Better Ceramics Through Chemistry II Symposium held Apr. 15-19, 1986, Palo Alto, CA, pp. 359-366.
Interrante et al., Chem. Abstracts, vol. 106 (15), 652 (13 Apr. 1987).
Patent Abstracts of Japan, vol. 12 (279) (1 Aug. 1988); JP-A-63 60 102.
Patent Abstracts of Japan, vol. 12 (450) (25 Nov. 1988); JP-A-63 176 302.
Patent Abstract of Japan, vol. 13 (249) (9 Jun. 1989); JP-A-1 56 308.

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