Electrical conductivity and thermoelectric power of the molten Tl + Se and Tl + Te systems

Abstract

The electrical conductivity and thermoelectric power of the liquid T1 + Se and T1 + Te systems have been measured as a function of concentration and temperature. Both of the systems show a deep minimum in the electrical conductivity at the composition corresponding to T1₂Se and T1₂Te. The absolute thermoelectric power changes its sign around this composition, being negative for the T1-rich solutions and positive for the Se- and Te-rich solutions. The impurity effect was examined in the T1₂Se melt. The electrical conductivity of the saturation range, where the carrier density can be considered to be constant, is discussed in the light of the scattering model.