Effect of carbon and α-Al_2O_3 on controlled synthesis of AlON powder

摘要

The α-Al_2O_3/C mixtures were prepared by ball milling, and then AlON powders were synthesized by carbo-thermal reduction and nitridation (CRN). The effects of α-Al_2O_3 particle size, carbon powders morphology and particle size on the morphology and particle size of the synthesized AlON powders were studied. The results showed that as the particle size of α-Al_2O_3 increases, the particle size of the synthesized AlON powders will also increase, but the surface morphology will not be affected. The increase of the carbon particle size will increase the particle size of the synthesized AlON powders. The pore size and number of pores of the synthetic AlON powders were very similar to the morphological characteristics of the carbon powders. In addition, the mechanism of controlling the synthesis of AlON powder with α-Al_2O_3 and carbon as raw materials was also discussed.