Ionic conductivity of Gd- and Y-doped ceria-zirconia solid solutions

被引：0
|
作者：
Ruehrup, Vera [1 ]
Wiemhoefer, Hans-Dieter [1 ]
机构：
[1] Univ Munster, Inst Inorgan & Analyt Chem, D-48149 Munster, Germany
来源：
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2006年 / 61卷 / 07期
关键词：
ceria; zirconia; lattice parameter; ionic conductivity; impedance;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The total conductivity of the solid solutions (Ce1-xZrx)(0.8)Gd0.2O1.9 and (Ce1-xZrx)(0.8)Y0.2O1.9 was measured in air as a function of temperature (T = 300 degrees C - 600 degrees C) and composition (x = 0.0-0.9). A deep minimum of the bulk ionic conductivity was found for equal fractions of ceria and zirconia. It indicates enhanced defect association and ordering of the oxygen vacancies around x = 0.5. X-ray analysis (Guinier technique) showed the diffraction pattern of the cubic fluorite structure for all investigated compositions 0 < x < 1. The lattice parameter decreased linearly with increasing zirconia content x.
引用
收藏
页码：916 / 922
页数：7
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