Process for producing an ultrafine powder of aluminum nitride

Details Process for producing an ultrafine powder of aluminum nitride Process for producing an ultrafine powder of aluminum nitride

1989-12-29

1991-02-12

Langel, Wayne A.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Binary compound

C01B 21072

Patent

active

049922530

ABSTRACT:
Disclosed is a process for producing an ultrafine powder of aluminum nitride. This process is characterized in adding 1-5 wt % of aluminum nitride powder to the mixture of alumina and carbon black and heating the resulting powder mixture at a temperature of 1550.degree.-1650.degree. C. in an atmosphere of nitrogen. Preferably, prior to heating, the powder mixture is shaped into a compact. The aluminum nitride powder prepared by the process of the present invention has an average particle diameter of about 0.45 micron and a purity of above 98.1%, and is therefore a very suitable material for making printed circuit boards and heat release boards for IC, LSI and VLSI.

REFERENCES:
patent: 3572992 (1971-03-01), Komeya et al.
patent: 3718490 (1973-02-01), Morgan et al.

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