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- Title
Optimization of single crystals of solid electrolytes with tysonite-type structure (LaF) for conductivity at 293 K: 2. Nonstoichiometric phases R MF ( R = La-Lu, Y; M = Sr, Ba).
- Authors
Sorokin, N.; Sobolev, B.; Krivandina, E.; Zhmurova, Z.
- Abstract
Single crystals of fluorine-conducting solid electrolytes RSrF and RBaF ( R = La-Lu, Y) with a tysonite-type structure (LaF) have been optimized for room-temperature conductivity σ K. The optimization is based on high-temperature measurements of σ( T) in two-component nonstoichiometric phases R MF ( M = Sr, Ba) as a function of the MF content. Optimization for thermal stability is based on studying the phase diagrams of MF- RF systems ( M = Sr, Ba) and the behavior of nonstoichiometric crystals upon heating when measuring temperature dependences σ( T). Single crystals of many studied RSrF and RBaF phases have σ values large enough to use these materials in solid-state electrochemical devices (chemical sensors, fluorine-ion batteries, accumulators, etc.) operating at room temperature.
- Subjects
MATHEMATICAL optimization; SINGLE crystals; SOLID electrolytes; TYSONITE; NONSTOICHIOMETRIC compounds; FLUORINE
- Publication
Crystallography Reports, 2015, Vol 60, Issue 1, p123
- ISSN
1063-7745
- Publication type
Article
- DOI
10.1134/S106377451501023X