Process for producing aluminum nitride

Details Process for producing aluminum nitride Process for producing aluminum nitride

1991-06-14

1993-06-22

Lewis, Michael

Chemistry of inorganic compounds

Nitrogen or compound thereof

Binary compound

C01B 21072

Patent

active

052215270

ABSTRACT:
For producing finely disperse aluminum nitride by reacting hydroxides of aluminum with carbon in a molar ratio of (1:1.5) to (1:2.5), the hydroxides of aluminum are intensively ground together with carbon, in particular carbon black, using a non-aqueous grinding fluid. After the non-aqueous grinding fluid has been separated off from the suspension, the ground material obtained is calcined at 400.degree. to 1000.degree. C., while passing nitrogen through. The material obtained is then treated under intensive contact with nitrogen for 1 to 100 hours at 1400.degree. to 1700.degree. C., before the excess carbon contained in the reaction product is removed by heating to 500.degree. to 900.degree. C. in contact with oxygen-containing gases.
The hydroxides of aluminum and the carbon can also be intensively ground separately from one another, using a non-aqueous grinding fluid, and the suspensions obtained can be mixed.

REFERENCES:
patent: 4618592 (1981-10-01), Kuramoto et al.
patent: 4680278 (1987-07-01), Inoue et al.
patent: 4975260 (1990-12-01), Imai et al.
Abstract and Translation of JP 63-297207, Dec. 5, 1988.

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