Tysonite Type Nanocrystalline Solid Solutions R1-xScxF3 (R = La, Pr): Synthesis and Electrical Conductivity

被引：4
|
作者：
Buchinskaya, I. I. [1 ]
Sorokin, N. I. [1 ]
机构：
[1] Shubnikov Inst Crystallog, Moscow 119333, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2023年 / 68卷 / 07期
关键词：
lanthanum fluoride; praseodymium fluoride; scandium fluoride; xerogel; nanocrystals; powder X-ray diffraction; ionic conductivity; impedance spectroscopy; IONIC-CONDUCTIVITY; ANION TRANSPORT; SINGLE-CRYSTALS; OPTIMIZATION; ELECTROLYTES; CE;
D O I：
10.1134/S0036023623600806
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The single-phase nanocrystalline R0.9Sc0.1F3 solutions (R = La, Pr) were synthesized by soft chemistry methods as transparent xerogels with the tysonite structure (space group P 3 c 1 ). The ionic conductivity of ceramic samples prepared from these materials was 4.5 x 10(-4) and 2.1 x 10(-3) S/cm at 773 K for R = La and Pr, respectively. The activation energy of the ion transfer in ceramic samples was 0.43 (R = Pr) and 0.48 eV (R = La) in the high-temperature segment and 0.56 eV (R = Pr) in the low-temperature segment. It was shown that the isovalent replacement of La3+ (Pr3+) cations in the R0.9Sc0.1F3 tysonite solid solutions with Sc3+ leads to 3-4-fold decrease in the conductivity of the ceramic electrolytes.
引用
收藏
页码：804 / 811
页数：8
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