Abstract
E. M. F. of galvanic cells with the solid electrolyte (ZrO2+CaO) was measured to determine the activities of gallium at high temperatures in the whole composition range for liquid Ga–Te and Ga–Sb alloys, and some thermodynamic functions were derived from the results. The cells used were as follows:
(−) W, Re|Ga, Ga2O3|ZrO+CaO|Ga–Te(l), Ga2O3|Re, W (+),
(−) W, Re|Ga–Sb(l), Ga2O3|ZrO2+CaO|Fe, FexO|W (+)
and
(−) W, Re|Ga, Ga2O3|ZrO2+CaO|Ga–Sb(l), Ga2O3|Re, W (+).
The activities of gallium in liquid Ga–Te alloys at 1123 K showed large negative deviations from Raoult’s law on the Te–rich side, and increased remarkably in the middle concentration range from negative to positive deviations from ideality. The activities of gallium in liquid Ga–Sb alloys at 1073 K showed moderate negative deviations from the ideality in the whole composition range.
These data are compared with published data.
