High Fluoride Conduction in Oxyfluoride Glasses Containing Heavy Metal Ions

Abstract

Thermal image furnace melting and twin roller quenching were used to prepare the high fluoride conducting oxyfluoride glasses in the systems of ZnF₂-PbF₂-SiO₂, BiF₃-PbF₂-SiO₂ and MnF₂-PbF₂-SiO₂. The dc electrical conductivities of these glasses were measured as a function of temperature. In all the systems, it was possible to find the glass compositions with high conductivitiy more than 10^-4Scm^-1 (200°C). The good correlation between logσ and the average polarizability calculated from the constituent cations was observed.