AIN微粉制备技术

Synthesizing process of AIN ultrafine powders

本文主要研究了AIN粉体的制备工艺,分别采用了γ—Al_2O_3—葡萄糖和AlCl_3—葡萄糖两种反应系统。初步探索了C/Al比、氮化温度、原料的预成型压力以及除碳工艺等因素对于粉体的N/Al比、平均粒径、物相组成等的影响。实验结果表明:γ—Al_2O_3—葡萄糖系统C/Almol比以5.0为宜;AlCl_3—葡萄糖系统适宜值为6.0。在1400℃,利用AlCl_3—葡萄糖反应系统,制得比表面为10.5m^2/g的AlN粉。

The process for synthesizing A1N from two reaction systems γ-A12O3-glucose and AlCl3-glucose was discussed in this paper. The effects of C/A1 ratio, nitridation temperature, pressing pressure and the carbon removal process over the powder properties such as N/Al ratio,particle size and composition etc. were investigated. The results showed that the appropriate ratio of C/A1 for γ-Al2O3 -glucose and AlCl3 -glucose systems were 5. 0 and 6. 0 respectively. AlN powder with specific surface areas of 10. 5m2/g was synthesized from A1C13-glucose reaction system at the calcination temperature 1400℃.