Method for preparing aluminum nitride powders

Details Method for preparing aluminum nitride powders Method for preparing aluminum nitride powders

1997-05-09

1998-12-08

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

Binary compound

C01B 21072

Patent

active

058465081

ABSTRACT:
A method for preparing aluminium nitride includes a first step in which a mixture is formed of aluminium powder and ammonium halide powder. The mixture is then molded into a tablet, which is ignited in an airtight chamber containing nitrogen gas. Aluminium nitride is formed of the tablet through the combustion reaction of the tablet. The gas generated in the decomposition of the ammonium halide forms a number of channels in the tablet so as to enable nitrogen gas to enter the tablet to react with aluminium. The synthesis of aluminium nitride of high purity under low pressure is possible in view of the catalytic effect of the ammonium halide.

REFERENCES:
patent: 5453407 (1995-09-01), Chung et al.
patent: 5460794 (1995-10-01), Chung et al.
patent: 5693305 (1997-12-01), Revankar et al.

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