Thermal and electrical conductivity of Sn–Ag–In alloys

Abstract The variations of thermal conductivity with temperature for Sn-[x]wt.% Ag-2 wt.% In, x = 4,20, 40, 60 and 71 alloys were measured with a radial heat flow apparatus. The variations of electrical conductivity of solid phases versus temperature for the same alloys were determined from the Wiedemann–Franz law by using the measured values of thermal conductivity. From the graphs of thermal and electrical conductivity versus temperature, the thermal conductivity of the solid phases at their melting temperatures, and the thermal temperature and the electrical coefficients for the same alloys were obtained. Dependency of the thermal and electrical conductivity on the composition of Ag in the Sn–Ag–In alloys were also investigated. According to present experimental results, the thermal and electrical conductivity of Sn-[x]wt.% Ag-2 wt.% In, x = 4,20, 40, 60 and 71 alloys linearly decrease with increasing the temperature and composition of Ag.