Influence of Mn-site doped with Ru on the high-temperature thermoelectric performance of CaMnO3-δ

被引：36

作者：

Zhou, YQ ^{[1
]}

Matsubara, I ^{[1
]}

Funahashi, R ^{[1
]}

Xu, GJ ^{[1
]}

Shikano, M ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Ikeda, Osaka 5638577, Japan

来源：

MATERIALS RESEARCH BULLETIN | 2003年 / 38卷 / 02期

关键词：

ceramics; oxides; x-ray diffraction; electrical properties; thermal conductivity;

D O I：

10.1016/S0025-5408(02)00997-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermoelectric properties were measured from room temperature to 1000 K to study the effects of doping of Ru for Mn-site on the thermoelectric performance of CaMnO3-delta. The electrical resistivity shows a sharp decrease upon Ru doping. The Seebeck coefficients of all the samples are negative, and their absolute values remain fairly large even after Ru doping. Among the samples of CaMn1-xRuxO3-delta (x = 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.15, 0.18), CaMn0.96Ru0.04O3-delta has the largest power factor, 1.85 x 10(-4) W/mK(2) at 1000 K. An increase or a decrease of x value results in a marked decrease of the power factor. The thermal conductivity and the figure of merit Z of CaMn0.96Ru0.04O3-delta is 2.88 W/mK and 0.64 x 10(-4) K-1 at 1000 K, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：341 / 346

页数：6

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