Electrical Conductivities of Molten Bi–BiI3 Solutions

Abstract

The electrical conductivities of Bi–BiI₃ solutions were measured above the consolute temperature over the entire composition range. The specific conductance increases continuously and monotonically with increasing metal composition; e.g., at 500°C the increase is from 0.32 for pure BiI₃ to 7170 (Ω cm)⁻¹ for the metal. The temperature coefficients of the specific conductance are positive for all compositions except those greater than 80 mole % bismuth. Both a positive and negative temperature coefficient were observed at 80%. The results are discussed in terms of various mechanisms of conductance.