Preparation, structure and electrical conductivity of pyrochlore-type Gd1-xEu2xSm1-xZr2O7 ceramics with a constant lattice parameter

被引：12
|
作者：
Liu, Zhan-Guo [1 ,2 ,3 ]
Ouyang, Jia-Hu [1 ]
Sun, Ke-Ning [2 ,3 ]
Zhou, Yu [1 ]
Xiang, Jun [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Nat Sci Res Ctr, Harbin 150080, Peoples R China
[3] Harbin Inst Technol, Dept Appl Chem, Harbin 150001, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2011年 / 56卷 / 20期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Rare-earth zirconate; Solid electrolyte; Impedance spectroscopy; Electrical conductivity; OXIDE FUEL-CELLS; FLUORITE; GD;
D O I：
10.1016/j.electacta.2011.06.001
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A novel series of Gd1-xEu2xSm1-xZr2O7 (x=0, 1/3, 1/2, 2/3, 1) ceramics with a constant lattice parameter are prepared by solid-state reaction, and are then evaluated as possible solid electrolytes. The microstructure and electrical properties of Gd1-xEu2xSm1-xZr2O7 ceramics have been investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and complex impedance analysis. Gd1-xEu2xSm1-xZr2O7 ceramics exhibit a single phase of pyrochlore-type structure. The total conductivity of Gd1-xEu2xSm1-xZr2O7 ceramics obeys the Arrhenius relation, and gradually increases with increasing temperature from 723 to 1173 K. At 973-1173 K, the composition has little effect on electrical conductivity of Gd1-xEu2xSm1-xZr2O7 ceramics. Gd1-xEu2xSm1-xZr2O7 ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 x 10(-4) to 1.0 atm at all test temperature levels. The maximum total conductivity of Gd1-xEu2xSm1-xZr2O7 ceramics is about 1.01 x 10(-2) S cm(-1) at 1173K in air. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：7045 / 7050
页数：6
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