Activity of Indium in Liquid In-Bi-Cu and In-Sb-Cu Alloys Measured by an EMF Method Using a Zirconia Electrolyte

The activities of indium in liquid In-Bi-Cu and In-Sb-Cu alloys have been determined by emf measurement using a zirconia electrolyte at 982∼1259 K and 871∼1267 K for fifteen and sixteen different compositions of the two alloy systems, respectively. Combining the binary data on In-Bi and In-Cu alloys in the In-Bi-Cu system, and In-Sb and In-Cu alloys in the In-Sb-Cu system, the isoactivity curves at 1050 and 1200 K, 1100 and 1200 K were obtained in the whole composition ranges, respectively. There seem to be no comparable published data.