Abstract
The activity of oxygen occuring at low concentrations in liquid Ga-Sb solutions was studied by means of the galvanic cell with zirconia solid electrolyte: W,O in Ga-Sb | ZrO2 + CaO | air, Pt. The coulometric titration technique was employed. The activity coefficient of oxygen was determined over the whole composition range as a function of temperature in the interval 1 123 K – 1 223 K. From the experimental resultsWagner's parameterh was deduced as:hGaSb=7 730J/g atom O. Values of oxygen activity coefficients in ternary gallium-indium-antimony alloys were predicted.
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