气相氢还原合成Nb_3Sn粉末过程的热力学模拟  

Thermodynamic Simulation of Nb_3Sn Synthesis Process by Hydrogen Reduction Method

作　　者：曹战民[1] 朱骏[1] 朱鸿民[1] 乔芝郁[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《稀有金属》2008年第4期478-481,共4页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(50601001;50574012)资助

摘　　要：基于多元多相平衡原理,建立了氢气还原NbCl5和SnCl2蒸汽合成Nb3Sn超细粉末过程的热力学模型,使用FactSage软件计算了NbCl5,SnCl2的蒸发温度和载气Ar(g)用量,H2(g)用量和还原反应温度、收集温度等关键参数对反应产物的影响。计算结果给出了合成Nb3Sn(s)所需要的蒸发温度与载气使用量的组合、不同还原反应温度时99%转化率时所需要的最小H2(g)用量以及不同收集温度时最终固体产物中杂质的含量。Based on the principle of multi-component and multi-phase equilibrium principle, a thermodynamic model was developed for the synthesis of Nb3Sn powder by the method of hydrogen reduction of NbCl5 and SnCl2 vapors. The effects of the key parameters, such as evaporation temperatures of NbCl5, SnCl2, the amounts of the loading gases Ar and reducing gas H2,the reduction and collection temperatures, were investigated by means of the calculation with FactSage software. The calculated results demonstrated the optimized evaporation temperatures and loading gases amounts, the least amount of H2 for the 99% conversion rate of Nb3Sn, and the impurities in the final product at the different collection temperatures.

关 键 词：NB3SN 合金粉末 氢还原 热力学模拟 FactSage 

分 类 号：TG146.4[一般工业技术—材料科学与工程]