Anisotropic thermoelectric properties of crystal-axis oriented ceramics of layer-structured oxide in the Ca-Co-O system

被引：32

作者：

Moon, JW ^{[1
]}

Nagahama, D ^{[1
]}

Masuda, Y ^{[1
]}

Seo, WS ^{[1
]}

Koumoto, K ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Appl Chem, Nagoya, Aichi 4648603, Japan

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2001年 / 109卷 / 08期

关键词：

thermoelectric; crystal-axis orientation; anisotropy; layered-structure; calcium cobalt oxide;

D O I：

10.2109/jcersj.109.1272_647

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：

Anisotropic thermoelectric properties of crystal-axis oriented polycrystals of layer-structured oxide in the Ca-Co-O system was discussed. Plate-like particles of (Ca2.7Bi0.3) (Co3.7Cu0.3)O9+delta were synthesized. To improve the thermoelectric properties, a c-axis oriented polycrystal of (Ca2.7Bi0.3) (Co3.7Cu0.3)O9+delta was successfully fabricated by uniaxial-pressing and sintering. The electrical conductivity along the ab-plane was about four times larger than that along the c-axis, while the Seebeck coefficients were similar. The thermal conductivity along the ab-plane was more than two times larger than that along the c-axis. The resulting figure-of-merit along the ab-plane was enhanced due to the enhanced electrical conductivity.

引用

页码：647 / 650

页数：4

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