Process for preparing aluminum nitride and aluminum nitride...

Details Process for preparing aluminum nitride and aluminum nitride... Process for preparing aluminum nitride and aluminum nitride...

C - Chemistry, Metallurgy

01

B

25/134, 23/223,

C01B 21/072 (2006.01) C04B 35/58 (2006.01) C04B 35/581 (2006.01) C30B 9/00 (2006.01) C30B 11/00 (2006.01) C30B 29/38 (2006.01)

Patent

CA 2004172

ABSTRACT OF THE DISCLOSURE A process for preparing aluminum nitride comprises reacting molten aluminum with nitrogen (or a nitrogen precursor) at a pressure of up to about 0.2 MPa (absolute) in the presence of less than about 5% by weight of a dopant selected from the metals magnesium, calcium, strontium and barium. The dopants reduce the passivation of aluminum to the formation of the nitride and impart desirable properties to the resulting aluminum nitride. In the case of magnesium, the nitride can be obtained in the form of novel single crystals of 1-10µm in size. In the case of the other dopants, the resulting aluminum nitride can be sintered without the use of additional sintering aids.

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