Synthesis of Aluminum Nitride by Nitridation of γ-Al_2O_3 Nanoparticles in Flowing Ammonia

摘要

Aluminum nitride (AlN) powder was synthesized by gas reduction-nitridation of γ-Al_2O_3, using NH_3 as the reactant gas. The results showed that A1N can be fabricated by this process at 1100°C for over 480 min in the flowing NH_3 atmosphere. However, no AlN was found in the products synthesized at 1300°C and 1400°C, which was different from the former reports. A series of experiments with different parameters were carried out, and the effects of reacting temperature and time on the synthesis of AlN were investigated. The reaction mechanism was also studied.