ELECTRICAL BEHAVIOR OF CERIA-STABILIZED ZIRCONIA WITH RARE-EARTH-OXIDE ADDITIVES

被引：11
作者：
CHIOU, BS
DAI, HT
DUH, JG
机构：
[1] NATL CHIAO TUNG UNIV,INST ELECTR,HSINCHU 30039,TAIWAN
[2] NATL TSING HUA UNIV,DEPT MAT SCI & ENGN,HSINCHU 30043,TAIWAN
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 04期
关键词：
ceria; electrical properties; grain boundaries; rare earths; zirconia;
D O I：
10.1111/j.1151-2916.1990.tb05127.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The electrical properties of rare‐earth oxide doped CeO2‐ZrO2 ceramics are evaluated by impedance spectroscopy. Doping of the trivalent metal oxide decreases both the grain and grain‐boundary resistivities of the CeO2‐ZrO2 system. The grain and grain‐boundary resistivities as well as the activation energy for conduction increase with the dopant cation radius. The grain conductivity is fairly constant for 2 mol% YO1.5‐10 mol% CeO2‐88 mol% ZrO2 samples sintered under different conditions, while lower grain‐boundary resistivity is obtained for samples sintered at higher temperature for longer times. Possible mechanisms for the electrical behavior of the rare‐earth oxide doped CeO2‐ZrO2 ceramics are proposed and discussed. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码：866 / 871
页数：6
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