Process for producing aluminum nitride

Details Process for producing aluminum nitride Process for producing aluminum nitride

C - Chemistry, Metallurgy

01

B

C01B 21/072 (2006.01) C04B 35/58 (2006.01)

Patent

CA 2045979

HOE 90/H 019 Process for producing aluminum nitride Abstract of the disclosure: 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 to 1000°C, while passing nitrogen through. The material obtained is then treated under intensive contact with nitrogen for 1 to 100 hours at 1400 to 1700°C, before the excess carbon contained in the reaction product is removed by heating to 500 to 900°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.

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