Abstract
Abstract Cubic aluminum nitride (AlN) was synthesized by the carbothermal nitridation reaction of aluminum oxide (Al 2 O 3 ). The effects of Al 2 O 3 particle size, reaction temperature and reaction time on the synthesis of cubic AlN were investigated, and the reaction mechanism was also analyzed. The results showed that cubic AlN could be formed at a lower temperature with fine Al 2 O 3 powder than with coarse Al 2 O 3 powder. The cubic AlN may be the product of Al 23 O 27 N 5 synthesized from Al 2 O 3 and hexagonal AlN, and transforms into hexagonal AlN at temperatures above 1800°C.
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