Equivalent Activity Coefficient Phenomenon of Cerium Reacting with Lead or Bismuth in Ag, Cu and Zn Alloy
来源期刊：JOURNAL OF RARE EARTHS2002年第6期
论文作者：钱乙余 薛松柏 董健
Key words：cerium; thermodynamics; activity coefficient;
Abstract: The relation between contents of cerium and impurity lead or bismuth to their activity coefficient in Ag, Cu and Zn-base alloy was calculated and analyzed by using the ternary system Chou model. The thermodynamic calculation results show that the "equivalent activity coefficient phenomenon" emerges among the activity coefficient of solute in a certain range of cerium (or at a certain point) for the Ce-Pb-X and Ce-Bi-X (X=Ag, Cu or Zn) ternary alloy system. Under this condition, the activity coefficient of solute has nothing to do with its own concentration. The preliminary theoretical analysis to this phenomenon was also made.
钱乙余1，薛松柏1，董健2
(1.National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China;
2.Harbin Welding Institute, Harbin 150080, China)
Abstract:The relation between contents of cerium and impurity lead or bismuth to their activity coefficient in Ag, Cu and Zn-base alloy was calculated and analyzed by using the ternary system Chou model. The thermodynamic calculation results show that the "equivalent activity coefficient phenomenon" emerges among the activity coefficient of solute in a certain range of cerium (or at a certain point) for the Ce-Pb-X and Ce-Bi-X (X=Ag, Cu or Zn) ternary alloy system. Under this condition, the activity coefficient of solute has nothing to do with its own concentration. The preliminary theoretical analysis to this phenomenon was also made.
Key words:cerium; thermodynamics; activity coefficient;
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