The effect of nano-SiO2 addition on electrical properties of the thermoelectric compound Ca3Co4O9

被引：5

作者：

Sun, Weiwei ^{[1
]}

Fan, Wenhao ^{[1
]}

Chen, Shaoping ^{[1
]}

Li, Yiyun ^{[1
]}

Meng, Qingsen ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China

来源：

ADVANCED IN NANOSCIENCE AND TECHNOLOGY | 2012年 / 465卷

关键词：

Nano-SiO2; Carrier Concentration; Power Factor; Point Defect;

D O I：

10.4028/www.scientific.net/AMR.465.292

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ca3CO4O9/x wt.%SiO2 composites were prepared by using field-activated pressure-assisted synthesis(FAPAS) process. The effects of nano-SiO2 addition on the microstructure and thermoelectric properties of the Ca3CO4O9 were investigated. With an increasing of the of SiO2 content, the size of Ca3Co4O9 particles decreased. The Seebeck coefficient decreased after the doping of nano-SiO2. The electrical conductivity firstly increased and then decreased with increasing amount of nano-SiO2 and the highest value belong to the Ca3Co4O9/0.5 wt.% SiO2 - sample. With the highest electric conductivity and slightly decreased Seebeck coefficient, the Ca3CO4O9/0.5 wt.%SiO2-sample achieved the highest power factor of 0.349 mw/mk(2) at 800 degrees C, which is 8% higher than the value of pure Ca3CO4O9 reported in the literature.

引用

页码：292 / 295

页数：4

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