ELECTRICAL CONDUCTIVITIES OF ALKALINE EARTH SULFIDES.

Abstract

In order to find a sulfide solid electrolyte with high ionic conductivity, the electrical conductivities of alkaline earth sulfides and CaS doped with a rare earth sulfide or a titanium group sulfide were measured. MgS, CaS and SrS showed ionic conduction at low sulfur partial pressure, but their conductivities were too low as a solid electrolyte. BaS and CaS doped with a rare earth sulfide exhibited high conductivity due to electronic conduction. CaS doped with a titanium group sulfide showed ionic conduction except at low sulfur pressure. CaS doped with TiS//2 showed high ionic conductivity. CaS doped with TiS//2 was the most suitable solid electrolyte for determination of sulfur in liquid iron.