Optimization of single crystals of solid electrolytes with tysonite-type structure (LaF3) for conductivity at 293 K: 2. Nonstoichiometric phases R 1−y M y F3−y (R = La-Lu, Y; M = Sr, Ba)

Autor:	Z. I. Zhmurova, E. A. Krivandina, B. P. Sobolev, N. I. Sorokin
Rok vydání:	2015
Předmět:	Crystallography Materials science Fast ion conductor Analytical chemistry General Materials Science Thermal stability General Chemistry Type (model theory) Conductivity Condensed Matter Physics Electrochemistry Phase diagram
Zdroj:	Crystallography Reports. 60:123-129
ISSN:	1562-689X 1063-7745
DOI:	10.1134/s106377451501023x
Popis:	Single crystals of fluorine-conducting solid electrolytes R 1 − y Sr y F3 − y and R 1 − y Ba y F3 − y (R = La-Lu, Y) with a tysonite-type structure (LaF3) have been optimized for room-temperature conductivity σ293 K. The optimization is based on high-temperature measurements of σ(T) in two-component nonstoichiometric phases R 1 − y M y F3 − y (M = Sr, Ba) as a function of the MF2 content. Optimization for thermal stability is based on studying the phase diagrams of MF2-RF3 systems (M = Sr, Ba) and the behavior of nonstoichiometric crystals upon heating when measuring temperature dependences σ(T). Single crystals of many studied R 1 − y Sr y F3 − y and R 1 − y Ba y F3 − y phases have σ293 K values large enough to use these materials in solid-state electrochemical devices (chemical sensors, fluorine-ion batteries, accumulators, etc.) operating at room temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b35fdd09230a1d9d6d86ffd57eb4fa78 https://doi.org/10.1134/s106377451501023x Zobrazit plný text záznamu Plný text ve formátu PDF