摘要
通过氧化铝碳热还原反应 ,用机械力活化法合成了纳米结构的氮化铝 ,研究了球磨活化对氧化铝碳热还原反应的作用 .发现氧化铝经球磨活化后 ,氮化铝在 1 0 0 0℃开始生成 ,碳热还原反应速度加快 ,反应激活能由 52 9kJ/mol降低到 4 57kJ/mol.机械力活化合成的氮化铝晶粒尺寸为 2 9nm ,颗粒平均尺寸为 8μm ,颗粒尺寸符合对数-正态分布 .
The nanocrystal aluminum nitride was synthesized by carbothermal reduction (CTR) from alumina. The effects of mechanical activation on aluminum nitride conversion were investigated. The results show that aluminum nitride start to form at 1 000 ℃ and the conversion ratio of aluminum nitride from alumina increases after mechanical activation. The activation energy decrease from 529 kJ/mol to 457 kJ/mol. The crystallite size of aluminum nitride with mechanical activation is 29 nm and the particle size is 8 μm which obey the logarithmic-canonic distribution.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2000年第5期468-471,共4页
Journal of The Chinese Ceramic Society
关键词
机械力活化合成
氮化铝
碳热还原
纳米晶结构
mechanical activation synthesis
aluminum nitride
carbothermal reduction
nanocrystal structure
