Preparation of AlN Powder by Microwave Carbon Thermal Reduction

Abstract

Aluminium nitride powders were prepared by microwave carbon thermal reduction method. The effects of aluminium sources,carbon sources and additives on AlN powder structure and morphology were studied. XRD analysis shows that most suitable aluminum source and carbon source are selected to be as aluminum hydroxide and acetylene black,respectively. The catalysis effect of additive A on nitridation is most obvious. Industry aluminum hydroxide and acetylene black are completely converted into AlN by adding additive A and heating at 1300℃ for 1h in nitrogen atmosphere. The results show that microwave carbon thermal reduction can reduce the reaction temperate and shortened the reaction time for the preparation of nitride powder.