Thermoelectric properties of Al substituted misfit cobaltite Ca3(Co1-xAlx)4O9 at low temperature

Yi Liu; Hong-mei Chen; Jin-lian Hu; Xu-bing Tang; Hai-jin Li; Wei Wang

doi:10.1007/s12613-014-0963-0

Volume 21 Issue 7

Jul. 2014

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文章导航 > 矿物冶金与材料学报（英文） > 2014 > 21(7): 720-725

Yi Liu, Hong-mei Chen, Jin-lian Hu, Xu-bing Tang, Hai-jin Li, and Wei Wang, Thermoelectric properties of Al substituted misfit cobaltite Ca₃(Co_1-xAl_x)₄O9 at low temperature, Int. J. Miner. Metall. Mater., 21(2014), No. 7, pp. 720-725. https://doi.org/10.1007/s12613-014-0963-0

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Yi Liu, Hong-mei Chen, Jin-lian Hu, Xu-bing Tang, Hai-jin Li, and Wei Wang, Thermoelectric properties of Al substituted misfit cobaltite Ca3(Co1-xAlx)4O9 at low temperature, Int. J. Miner. Metall. Mater., 21(2014), No. 7, pp. 720-725. https://doi.org/10.1007/s12613-014-0963-0

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Thermoelectric properties of Al substituted misfit cobaltite Ca₃(Co_1-xAl_x)₄O9 at low temperature

School of Mathematics and Physics, Anhui University of Technology, Ma'anshan, 243032, China
Institute of Optoelectronic Information Materials and Technologies, Anhui University of Technology, Ma'anshan, 243032, China
School of Materials Science & Engineering, Anhui University of Technology, Ma'anshan, 243000, China

通讯作者:
Yi Liu E-mail: yliu@ahut.edu.cn

中文摘要

Thermoelectric properties of Al substituted compounds Ca₃(Co_1-xAl_x)₄O9 (x = 0, 0.03, 0.05), prepared by a sol-gel process, have been investigated in the temperature range 305–20 K. The results indicate that after Al substitution for Co in Ca₃(Co_1-xAl_x)₄O₉, the direct current electrical resistivity and thermopower increase due to the reduction of carrier concentration. Experiments show that Al substitution results in decreased lattice thermal conductivity. The figure of merit of temperature behavior suggests that Ca₃(Co_0.97Al_0.03)₄O₉ would be a promising candidate thermoelectric material for high-temperature thermoelectric application.

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Thermoelectric properties of Al substituted misfit cobaltite Ca₃(Co_1-xAl_x)₄O9 at low temperature

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Abstract

Abstract

Thermoelectric properties of Al substituted compounds Ca₃(Co_1-xAl_x)₄O9 (x = 0, 0.03, 0.05), prepared by a sol-gel process, have been investigated in the temperature range 305–20 K. The results indicate that after Al substitution for Co in Ca₃(Co_1-xAl_x)₄O₉, the direct current electrical resistivity and thermopower increase due to the reduction of carrier concentration. Experiments show that Al substitution results in decreased lattice thermal conductivity. The figure of merit of temperature behavior suggests that Ca₃(Co_0.97Al_0.03)₄O₉ would be a promising candidate thermoelectric material for high-temperature thermoelectric application.
- transition metal oxides;
- sol-gel process;
- thermoelectricity;
- electrical properties;
- substitution