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PRODUCTION OF MIXTURE OF ULTRA-FINE ALUMINUM NITRIDE POWDER AND ULTRA-FINE OXIDATION-RESISTANT ALUMINUM POWDER
PRODUCTION OF MIXTURE OF ULTRA-FINE ALUMINUM NITRIDE POWDER AND ULTRA-FINE OXIDATION-RESISTANT ALUMINUM POWDER
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机译：超细氮化铝粉混合物的生产和超细抗氧化铝粉的生产
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摘要
PURPOSE:To highly purify the titled ultra-fine powder at low temp. and in a short time by introducing the mixture of the ultra-fine powder of aluminum nitride and metallic aluminum into a fluidized bed at 400-1,000 deg.C in a nitrogen atmosphere to partially nitride the surface of the ultra-fine metallic aluminum powder. CONSTITUTION:Metallic aluminum is melted by the flame of an arc or plasma jet generator in the atmosphere of nitrogen or a mixture of nitrogen and an inert gas to generate a mixture of the ultra-fine powder of aluminum nitride and metallic aluminum. The mixture of the ultra-fine powder is introduced into a fluidized bed heated at 400-1,000 deg.C in the nitrogen atmosphere to partially nitride the surface of the ultra-fine metallic aluminum powder. The device for producing mixed ultra-fine powder by plasma generation can be composed, for example, of a closed vessel 1, arc plasma 2, molten aluminum, the fluidized bed 4, and an atmosphere gas inlet 5.
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