Fluorite-structured heterovalent PbF2:ScF3 and isovalent PbF2:MF2 (M = Mg, Ba, Cd) concentrated solid solutions were prepared, in single-crystal form, for a wide range of concentrations. Eutectic and near-eutectic composites were prepared, from the melt, using the eutectic systems, PbF2–MgF2 and PbF2–ScF3. Saturated solid solutions in each system formed the 2 phases of these composites. The fast ionic conductivity, static permittivity and microstructure of both single crystals and composites were examined. The greatest ionic conductivity, with a conduction enthalpy of 0.389eV, was found for PbF2:7m/oScF3 solid electrolyte. The fluoride-ion conductivity in this material, at 500K, was equal to 0.13S/cm.

Fast Ionic Conductivity of PbF2:MF2 (M = Mg, Ba, Cd) and PbF2:ScF3 Single Crystals and Composites. V.Trnovcová, P.P.Fedorov, I.I.Buchinskaya, V.Šmatko, F.Hanic: Solid State Ionics, 1999, 119[1-4], 181-9