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)

Patent

CA 2247339

A process for producing aluminum nitride comprises a step of nitriding directly a mixed powder comprising of, a bulky aluminum powder composed of aluminum or an aluminum alloy powder which occupies 50 to 97% by weight and whose sieve opening of JIS is not less than 210 µ m (70 mesh); and a nitriding accelerator powder composed of at least one kind of an aluminum powder and an aluminum alloy powder which occupy the balance of 50 to 3% by weight and whose sieve opening is less than 210 µ m (70 mesh); under a nitrogen gas atmosphere of the temperature ranging from 500 to 1000 °C. In the present invention, there can be obtained an aluminum nitride which is easy to be crushed by hand by using a mortar.

Procédé servant à préparer du nitrure d'aluminium et consistant à effectuer la nitruration directe d'un mélange de poudre de matières premières contenant 50 à 97 % en poids d'une poudre d'aluminium grossière dont l'ouverture de pore est de 210 mu m (70 mesh) comme stipulé par JIS, ou d'une poudre d'alliage d'aluminium dont le reste (50 à 3 % en poids) est constitué par au moins un accélérateur de nitruration pulvérulent sélectionné dans des poudres d'aluminium et d'alliage d'aluminium présentant une ouverture de pore de 210 mu m (70 mesh), dans une atmosphère d'azote gazeux située entre 500 et 1000 DEG C. Ce procédé permet d'obtenir du nitrure d'aluminium qu'on peut fractionner à la main sans difficultés dans un mortier.

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