Ionic conductivity of BaF2 + ZnF2 + CdF2 + YbF3 optical fluoride ceramic

被引：2
|
作者：
Sorokin, N. I. [1 ]
Fedorov, P. P. [2 ]
Buchinskaya, I. I. [1 ]
Sobolev, B. P. [1 ]
机构：
[1] Russian Acad Sci, Crystallog & Photon Fed Res Ctr, Leninskii Pr 59, Moscow 119333, Russia
[2] Russian Acad Sci, Prokhorov Gen Phys Inst, Ul Vavilova 38, Moscow 119991, Russia
来源：
INORGANIC MATERIALS | 2017年 / 53卷 / 03期
关键词：
ion transport; impedance spectroscopy; fluorides; SINGLE-CRYSTALS; ELECTROCHEMICAL DEVICES; SOLID ELECTROLYTES; FLUORITE PHASES; FEATURES; TRANSPORT; LU; CRYSTALLIZATION; NANOFLUORIDES; PRODUCTS;
D O I：
10.1134/S0020168517030098
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The electrical conductivity of an optical fluoride ceramic in the quaternary system BaF2 + ZnF2 + CdF2 + YbF3 has been determined in the temperature range 338-722 K using impedance spectroscopy (5 to 5 x 10(5) Hz). The 500-K ionic conductivity of the ceramic is sigma = 3.3 x 10(-4) S/cm, which corresponds to the electrical characteristics of single crystals of the best conducting nonstoichiometric M1-x R (x) F2 + x (M = Sr, Ba; R = La-Nd; x = 0.3-0.5) fluorite phases. We have observed nonmonotonic variation (breaks) in temperature-dependent sigma, which is due to competing fluoride ion transport processes in different parts of the ceramic sample. The highly conductive state of the BaF2 + ZnF2 + CdF2 + YbF3 fluoride ceramic seems to be due to the formation of structural regions corresponding to a Ba1-x Yb (x) F2 + x solid solution.
引用
收藏
页码：313 / 317
页数：5
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