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应用科学学报 ›› 1983, Vol. 1 ›› Issue (1): 43-48.

• 论文 • 上一篇    下一篇

Na|β-Al2O3|NaxHg1-x固体电解质电池的电动势和低钠汞齐中活度的测量

孙成文, 郭祝崑, 曹佳弟   

  1. 中国科学院上海硅酸盐研究所
  • 收稿日期:1981-12-29 出版日期:1983-03-31 发布日期:1983-03-31

MEASUREMENT OF SODIUM ACTIVITY IN DILUTED LIQUID SODIUM AMALGAM USING SOLID ELECTROLYTE CELL Na|β-Al2O3|NaxHg1-x

SUN CHENGWEN, KUO CHUKUN, CAO JIADI   

  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences
  • Received:1981-12-29 Online:1983-03-31 Published:1983-03-31

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摘要： 测量了Na|β-Al2O3|NaxHg1-x电池的电动势(E),并据此计算了低钠汞齐中钠的活度系数(γNa).仔细的数据分析表明,各电池电动势的温度系数在318.15K、333.15K、353.15K和370.85K附近均有微小转折,各温度区间温度系数的差异随x值变小而减小.最后,得出电池电动势、钠的活度系数和钠/以无限稀释汞齐为参考态的假想态钠汞组分电池的标准电动势(E0)的实验参数方程式.

Abstract: Sodium activity coefficient in liquid sodium amalgam has been determined by measuring the emf of the solid electrolyte cell Na|β-Al2O3|NaxHg1-x, for x=0.00001 to 0.055 at temperatures from 303.15 K to 383.15 K. The temperature dependence of the emf of the cells with various x values shows several small breaks located at ca. 318.15K, 333. 15K, 353.15 K and 370.85 K respectively. The discrepancies of the emf-temperature coefficients in different temperature-intervals decrease gradually with decreasing x values. Experimental parameter eguations determined for (1) emf of the cells (E)， (2) sodium activity coefficients in amalgams (γNa)， and (3) standard emf (E0) of the cell consisting of pure sodium and a hypothetical sodium amalgam with state extrapolated from a reference state at infinite dilution are as follows.