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

被引：27

作者：

Zhou, A. J. ^{[1
]}

Zhu, T. J. ^{[1
]}

Zhao, X. B. ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE | 2008年 / 43卷 / 05期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1007/s10853-007-2365-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

P-type perovskite oxides La(1-x)Sr(x)CoO(3) (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(sigma T)-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 Co(3+) 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.

引用

页码：1520 / 1524

页数：5

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