碳热还原法合成氮化铝的机理与热力学条件

Mechanisms and Thermodynamics Conditions of Carbothermal Reduction Nitridation Reactions

介绍了碳热还原制备氮化铝的各种反应机制 ,通过对各种反应机制的分析和热力学计算 ,评述了气固反应机制、固相反应机制和矿化剂催化反应机制的特点、反应过程和热力学条件 .根据对反应过程的热力学分析 ,认为有气相和液相参与的固相扩散反应机制 ,能够较好的解释碳热还原的反应过程 ,但反应的中间产物和两种不同机制之间的相互作用。

Several mechanisms of AlN synthesis by carbothermal reduction method were reviewed. The reaction progress and thermodynamics conditions of three mechanisms, i.e. gas\|solid reaction, solid\|solid reaction and solid\|liquid reaction mechanisms were discussed by the analysis of three reaction thermodynamics. It is believed that the solid\|solid reaction with gas and liquid phase seemed more reasonable and could explain more experimental results. But, there are some problems such as interaction and transformation conditions between two mechanisms need to consider.