Enhancement of Ca3Co4O9 thermoelectric properties by Cr for Co substitution

被引：71

作者：

Diez, J. C. ^{[1
]}

Torres, M. A. ^{[2
]}

Rasekh, Sh ^{[1
]}

Constantinescu, G. ^{[1
]}

Madre, M. A. ^{[1
]}

Sotelo, A. ^{[1
]}

机构：

[1] UZ, CSIC, ICMA, Dept Ciencia & Tecnol Mat & Fluidos, E-50018 Zaragoza, Spain

[2] Univ Zaragoza, Dept Ingn Diseno & Fabricac, E-50018 Zaragoza, Spain

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 06期

关键词：

Powders: solid state reaction; Sintering; Platelets; Electrical properties; Thermopower; CERAMICS; MICROSTRUCTURE; PERFORMANCE; OPTIMIZATION; FABRICATION; IMPROVEMENT; COBALTITES; GROWTH; OXIDE; POWER;

D O I：

10.1016/j.ceramint.2013.01.021

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：

Ca3Co4-xCrxO9 polycristalline thermoelectric ceramics with small amounts of Cr have been synthesized by the classical solid state method. Microstructural characterizations have shown that all the Cr has been incorporated into the Ca3Co4O9 structure and no Cr-containing secondary phases have been produced for Cr contents <= 0.05. Apparent density measurements have shown that all samples are very similar, with densities around 75% of the theoretical one. Electrical resistivity decreases and Seebeck coefficient slightly raises when Cr content increases until 0.05 Cr addition. The improvement in both parameters leads to higher power factor values than the usually obtained by conventional solid state routes. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：6051 / 6056

页数：6

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