Electrical properties of molten AgCl-Ag2Te mixtures

The electrical conductivity, a, and thermoelectric power, S, of molten (AgC l)(1-c)(Ag2Te)(c) have been measured as a function of temperature. The cond uctivity decreases rapidly on the addition of AgCl to liquid Ag2Te and it r eaches a minimum at c = 0.2. The positive value of S on the Ag2Te-rich side decreases gradually as the concentration of AgCl is increased. The large v alue of S on the AgCl-rich side decreases rapidly on addition of Ag2Te. As a result, the composition dependence of S shows a minimum with a negative v alue near c = 0.5. The competition of the electronic and ionic transport in these mixtures is reflected in the temperature dependence of thermoelectri c power for the mixtures with 0.3 less than or equal to c less than or equa l to 0.5. The electrical behaviour of molten mixtures with c greater than o r equal to 0.6 was analysed by using the electronic model of liquid semicon ductors.