Activity measurement of indium in liquid In-Sb-Ag and In-Sb-Te alloys by Emf method with zirconia solid electrolyte

Emf of galvanic cells with zirconia solid electrolyte was measured to determine the activity of indium in the liquid In-Sb-Ag and In-Sb-Te systems in temperature ranges from 970 to 1280 K for the In-Sb-Ag system and for the In-Sb-Te from 870 to 1260 K. The following cells were used: Pt/Ni, NiO|ZrO₂ (+ CaO) | In-Sb-Ag, In₂O₃/Re/Pt, Pt/Ni, NiO | ZrO₂ (+ CaO) | In-Sb-Te, In₂O₃/Re/Pt. The isoactivity curves in the liquid In-Sb-Ag and In-Sb-Te systems at 1100 K were derived from combining the activity data of the In-Sb, In-Ag and In-Te binary alloys. The shape of isoactivity curves in the liquid In-Sb-Ag exhibits a slight bend to the Sb-Ag binary side, and those of the liquid In-Sb-Te gather from the whole composition range of the In-Sb binary alloy to the intermediate composition of the In-Te system.