Abstract:
The goal of this paper is to measure the electrical and thermal conductivity variations with temperature in the unidirectional solidified quaternary Sn–Bi–In–Zn lead-free solder alloys for nine different
compositions to determine the phonon thermal conductivity variation with temperature. The measurements
of electrical and thermal conductivity variations with temperature were put into practice with the methods of
four-point probe and longitudinal heat flow, respectively, and the electron and phonon thermal conductivity
variations with temperature for the alloys were plotted. In addition, the temperature coefficient values for
electrical and thermal conductivity were calculated.