Ionic conductivity investigation in samarium and strontium co-doped ceria system

被引：48
|
作者：
Yeh, Tsung-Her [1 ]
Chou, Chen-Chia [1 ]
机构：
[1] Natl Taiwan Univ Sci & Technol, Dept Mech Engn, Adv Ceram Lab, Taipei 10672, Taiwan
来源：
PHYSICA SCRIPTA | 2007年 / T129卷
关键词：
D O I：
10.1088/0031-8949/2007/T129/067
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Effects of strontium doping on ionic conductivity of Sm2O3-doped ceria (samarium-doped ceria (SDC)) were investigated. The distribution and average radius of oxygen vacancies by co-doping divalent and trivalent cations were calculated from a hard-sphere model. Experimental results exhibit that the best conductivity for Ce0.78Sm0.2Sr0.02O1.88 (0.061 S cm(-1)) specimen is twice that of Ce0.8Sm0.2O1.9 (0.0371 S cm(-1)) at 800 degrees C. A decrease of 50 degrees C in the working temperature of SDC was developed by modifying the dopant concentration, average binding energy and ionic radius of the dopant. The results confirm the Sm3+ and Sr2+ co-doped ceria material as a potential electrolyte for intermediate-temperature solid oxide fuel cell applications.
引用
收藏
页码：303 / 307
页数：5
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