Fine powder of aluminum nitride, composition and sintered...

Details Fine powder of aluminum nitride, composition and sintered... Fine powder of aluminum nitride, composition and sintered...

C - Chemistry, Metallurgy

04

B

23/223

C04B 35/58 (2006.01) C01B 21/072 (2006.01) C04B 35/581 (2006.01)

Patent

CA 1223114

Abstract of the Disclosure A fine powder of aluminum nitride having an average particle diameter of not more than 2 microns and comprising at least 94% by weight of aluminum nitride, at most 3% by weight of bound oxygen and at most 0.5% by weight as metal of metal compounds as impurities. The fine aluminum nitride powder is prepared from a fine alumina powder and a fine carbon powder as starting materials. The fine aluminum nitride powder provides a sintered body having a high purity and a high density such as at least 2.9 g/cm3. The fine aluminum nitride powder is also useful as a raw material for alpha-Sialson, beta-Sialon and AlN polytypes, as an addition aid in various ceramics.

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