摘要
本文从含化合物金属熔体的共存理论和相图出发,用回归分析法确定了Bi-In金属熔体中存在有Bi_5In_3,BiIn和BiIn_2三种化合物,推导了各组元的作用浓度计算模型.在673～4200K之间的不同温度下,计算的N_(In),N_(Bi)和实际的活度值完全符合.同时求得了生成各化合物的lgk—T关系式(673-1200K)为: 各化合物的标准生成自由能为:
Based on the coexistence theory of metallic melt structure involved with formation of compound and anal ysis of system Bi-In phase diagram, and by means of regression analysis, it is determined that there are three compounds (Bi_5In_3, BiIn, and BiIn_2) existing in the melt. Based on these structural units, the calculation model of mass action concentrations is deduced. Furthermore, I_gK-T relations of the above mentioned compounds are also determined to be lgK_(Bi_5In_3)=1768.43/T-0.524 lgK_(BiIn)=700.831/T-0.804 lgK_(BiIn_2)=405.631/T-0.387 in the range of 673 to 1200K. The standard free energy of formation for these compounds are respectively △G_(Bi_5In_3)~o=-33857.53+10.03T J/mol(673～1200K) △G_(BiIn)~o=-13420.53+15.40T J/mol(673～1200K) △G_(BiIn_2)~o=-7767.61+7.41T J/mol(673～1200K)
出处
《化工冶金》
CSCD
北大核心
1992年第1期10-16,共7页
关键词
作用深度
铋铟金属熔体
计算模型
Bi-In metallic melt Coexistence theory Mass action concentration Regression analysis
