Fluorite-structured concentrated solid solutions with a broad concentration range were prepared as single crystals. In this system, eutectic and near-eutectic composites were prepared from the melt. Saturated solid solutions in the system formed 2 phases in these composites. The fast ionic conductivity and microstructure of single crystals and composites were examined. The fastest ionic conductivity, with a conduction enthalpy of 0.389eV, was found for a PbF2-7mol%ScF3 solid electrolyte. In this material, the F-ion conductivity at 500K was equal to 0.13S/cm.

V.Trnovcová, P.P.Fedorov, I.I.Buchinskaya, V.Smatko, F.Hanic: Solid State Ionics, 1999, 119[1-4], 181-9