Thermoelectric properties of perovskite oxides La1−xSrxCoO3 prepared by polymerlized complex method

被引：0
|
作者：
A. J. Zhou
T. J. Zhu
X. B. Zhao
机构：
[1] Zhejiang University,State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering
来源：
Journal of Materials Science | 2008年 / 43卷
关键词：
Thermoelectric Property; Seebeck Coefficient; LaCoO3; Measured Temperature Range; Small Polaron Conduction;
D O I：
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中图分类号：
学科分类号：
摘要：
P-type perovskite oxides La1−xSrxCoO3 (0 ≤ x ≤ 0.2) have been prepared using a polymerlized complex method and sintering. The Seebeck coefficient, electrical conductivity, and thermal conductivity of the oxides were studied from room temperature to 773 K. The ln(σT)−1/T relationships revealed small-polaron hopping mechanism for the higher Sr contents. Large Seebeck coefficients were observed in lightly Sr-doped samples. Sr doping greatly reduced the Seebeck coefficient and enhanced the electrical and thermal conductivity of the samples. The temperature-induced spin-state transition of Co3+ ions strongly influenced the transport properties. The highest ZT value found in this series of oxides was 0.046 at 300 K for x = 0.1.
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页码：1520 / 1524
页数：4
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