ACTIVITY MEASUREMENT OF GALLIUM IN GA-BI AND GA-SB-BI ALLOYS BY EMF METHOD USING ZIRCONIA AS SOLID-ELECTROLYTE

EMF of galvanic cells with zirconia solid electrolytes was measured to determine the activity of gallium in liquid Ga-Bi and Ga-Sb-Bi alloys in the temperature range 1050-1150 K in the entire composition range. Ga, Ga2O3 and Fe, Fe(x)O mixtures were used as reference electrodes. The activity of gallium in Ga-Bi alloys shows a moderately positive de viation from ideality at 1073 K. The isoactivity curves at 1073 K are obtained in the ternary system, and the shape of the curves are simple and show a very small deviation from the straight lines which connect the starting points in the Ga-Sb system and the ending points in the Ga-Bi system.