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.