Thermodynamic and electronic properties of liquid Na-Bi alloys

The electrical conductivity of liquid Na-Bi alloys was measured between 8500C and 9000C for mole fractions of Na between 0.70 and 0.80. The behavior shows that Na/sub 3+delta/Bi is a liquid compound semiconductor. The Gibbs energy of mixing was also measured at 8500C over the same composition range using a boiling point tehnique and an emf technique with CaF2 as a solid electrolyte. Results were interpreted in terms of a simple model of Carl Wagner. The analysis yields the number of conduction electrons and electron holes as a function of composition as well as the mobility of electrons and electron holes