1999
DOI: 10.1134/1.1131083
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Superionic conductivity of the heterovalent solid solutions R 1−x M x F 3−x (R=REE, M=Ca, Ba) with tysonite-type structure

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Cited by 26 publications
(26 citation statements)
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“…The temperature dependence of σ in each part is described by the Arrhenius type equa tion σ = (A/T)exp(-ΔH/kT), where A is the preexpo nential conductivity factor and ΔH is the activation enthalpy of charge carrier migration. The data on the ionic conductivity of the starting R 1-y M y F 3-y crystal [3] are also given in the figure. One can see that the σ values for both the initial and irradiated crystals are in good agreement (σ = 7 × 10 -5 S/cm at 293 K).…”
Section: Resultsmentioning
confidence: 98%
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“…The temperature dependence of σ in each part is described by the Arrhenius type equa tion σ = (A/T)exp(-ΔH/kT), where A is the preexpo nential conductivity factor and ΔH is the activation enthalpy of charge carrier migration. The data on the ionic conductivity of the starting R 1-y M y F 3-y crystal [3] are also given in the figure. One can see that the σ values for both the initial and irradiated crystals are in good agreement (σ = 7 × 10 -5 S/cm at 293 K).…”
Section: Resultsmentioning
confidence: 98%
“…A nonmonotonic dependence of (σ on the concentration of the impurity component MF 2 is typical of R 1 -y M y F 3 -y [1][2][3]: the maximum value σ = 5 × 10 -4 S/cm at 20°С is observed for crystals with ~5 mol % MF 2 . Along with electrolytic proper ties, R 1 -y M y F 3 -y crystals have good technological characteristics, such as the absence of phase transi tions, low electron conductivity, and thermal and chemical stability.…”
Section: Introductionmentioning
confidence: 99%
“…The purpose of this cycle of studies (two in number) is to perform systematic optimization (with respect to thermal stability and σ(293 К) value) of single crystals of two component tysonite nonstoichiometric phases R 1 -y M y F 3 -y (R = La-Lu, Y; M = Ca, Sr, Ba) in the MF 2 -RF 3 systems [25,33], for which high tempera ture investigations of σ were performed previously in [35][36][37][38][39][40][41][42][43][44][45][46][47].…”
Section: Procedures Used To Increase Ionic Conductivitymentioning
confidence: 99%
“…The decomposition of tysonite crystals under certain tem perature conditions limits their practical application in thermally cycled devices. Because of this limitation, along with the optimization with respect to σ(293 К), the optimization of high conductivity compositions with respect to thermal stability should be performed [35][36][37][38][39][40][41][42][43][44][45][46][47].…”
Section: Procedures Used To Increase Ionic Conductivitymentioning
confidence: 99%
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