摘要
研究了Ca-La2O3-Ni体系还原扩散法制备LaNi5的动力学过程。结果说明,应用收缩核模型确定扩散是该体系反应的控制步骤,得知在高温下可用Ca主要以气态形式迁移,还原La2O3生成La,La再往Ni中扩散生成LaNi5,同时求得生成LaNi5的表观活化能为33 kJ.mol-1。
The thermodynamic feasibility of Ca-LaEO3- Ni system was analyzed to produce LaNi5 by reductiondiffusion. The contracting core model was applied. It is shown that the diffusion is the rate-control step of the reaction, Ca transfers to the surface of La203 by gaseity, Ca can reduce La2O3 and produce La, and then La diffused into Ni to form LaNi5 at high temperature. The apparent activation energy of the reaction is 33 kJ·mol^-1.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2005年第6期934-936,共3页
Chinese Journal of Rare Metals
基金
辽宁省博士启动基金资助项目(20021021)
