Fast ionic conductivity of PbF2:MF2 (M=Mg, Ba, Cd) and PbF2:ScF3 single crystals and composites

The fluorite-structured heterovalent PbF2:ScF3 and isovalent PbF2:MF2 (M=Mg, Ba, Cd) concentrated solid solutions were prepared as single crystals in a broad concentration range. In the eutectic systems, PbF2–MgF2 and PbF2–ScF3, the eutectic and near-eutectic composites were prepared from the melt....

Full description

Saved in:
Bibliographic Details
Published in:Solid state ionics 1999-04, Vol.119 (1-4), p.181-189
Main Authors: Trnovcová, V, Fedorov, P.P, Buchinskaya, I.I, Šmatko, V, Hanic, F
Format: Article
Language:English
Subjects:
Composites prepared from the melt
Concentrated solid solutions
Eutectic composites
Fast fluoride-ion conductivity
Heterovalent doping
Isovalent doping
Lead fluoride-based superionics
Microstructure
Near-eutectic composites
Solid electrolytes
Static permittivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The fluorite-structured heterovalent PbF2:ScF3 and isovalent PbF2:MF2 (M=Mg, Ba, Cd) concentrated solid solutions were prepared as single crystals in a broad concentration range. In the eutectic systems, PbF2–MgF2 and PbF2–ScF3, the eutectic and near-eutectic composites were prepared from the melt. Saturated solid solutions of each system form two phases of these composites. The fast ionic conductivity, static permittivity and microstructure of both the single crystals and the composites are examined. Fastest ionic conductivity, with a conduction enthalpy of 0.389 eV, is found in PbF2:7 m/o ScF3 solid electrolyte. In this material, the fluoride ion conductivity at 500 K is equal to 0.13 S/cm. Plausible models of defect structures and conduction mechanisms are proposed for all examined systems.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(98)00501-3