We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
293-K conductivity optimization for single crystals of solid electrolytes with tysonite structure (LaF): I. Nonstoichiometric phases RCaF ( R = La-Lu, Y).
- Authors
Sobolev, B.; Sorokin, N.; Krivandina, E.; Zhmurova, Z.
- Abstract
The systematic optimization of single-crystal fluoride-conducting solid electrolytes RCaF with a tysonite type structure (LaF) with respect to the conductivity at room temperature, σ(293 K), is based on high-temperature measurements of σ( T) of stoichiometric fluorides of rare earth elements, RF ( R = La-Nd), in dependence of the radius $$R^{3 + } (r_{R^{3 + } } )$$; two-component stoichiometric La RF phases ( R = Pr, Nd) in dependence on the average cation radius ( r); and two-component nonstoichiometric phases RCaF ( R = La-Lu, Y) in dependence of the CaF content. The optimization of the composition with respect to thermal stability is based on studying the phase diagrams of CaF- RF systems and the behavior of RCaF crystals upon heating when measuring temperature dependences σ( T). Singlecrystal samples of a number of investigated RCaF compounds has σ(293 K) values high enough to be applied in solid-state electrochemical devices operating at room temperature (chemical sensors, fluorine-ion batteries, and accumulators) and in devices subjected to thermal cycling.
- Subjects
THERMAL conductivity; MATHEMATICAL optimization; SINGLE crystals; SOLID electrolytes; TYSONITE; NONSTOICHIOMETRIC compounds
- Publication
Crystallography Reports, 2014, Vol 59, Issue 4, p550
- ISSN
1063-7745
- Publication type
Article
- DOI
10.1134/S1063774514040191