Synthesis and thermoelectric properties of the new oxide materials Ca3-xBixCo4O9+δ (0.0 < x < 0.75)

被引：210

作者：

Li, SW ^{[1
]}

Funahashi, R ^{[1
]}

Matsubara, I ^{[1
]}

Ueno, K ^{[1
]}

Sodeoka, S ^{[1
]}

Yamada, H ^{[1
]}

机构：

[1] Osaka Natl Res Inst, AIST, Dept Energy Convers, Ikeda, Osaka 563, Japan

来源：

CHEMISTRY OF MATERIALS | 2000年 / 12卷 / 08期

关键词：

D O I：

10.1021/cm000132r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new series of oxides Ca3-xBixCo4O9+delta, (x = 0.0-0.75) with Ca2Co2O5-type structures were synthesized, and their structures, electrical properties, Seebeck coefficients, and thermal conductivities were measured. The values of Seebeck coefficients of the new oxides are all positive, showing that they are p-type conductors. Both the electrical conductivity and Seebeck coefficients increase with the increasing Bi contents which can be attributed to the increase of carrier mobility due to the larger size of Bi ion. The electrical conductivity, Seebeck coefficient, and the calculated value of the power factor of Ca3-xBixCo4O9+delta (x = 0.5) are 105 S cm(-1), 160 mu V K-1, and 2.7 x 10(-4) W K-2 m(-1) at 700 degrees C, respectively. The thermal conductivity of Ca3-xBixCO4O9+delta (x = 0.5) at room temperature is 1.14 W m(-1) K-1 and increase slightly with the increasing temperature. At 700 degrees C, the figure of merit of Ca3-xBixCo4O9+delta (x = 0.5) is 2.0 x 10(-4) K-1.

引用

页码：2424 / 2427

页数：4

共 22 条

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Synthesis and thermoelectric properties of the new oxide materials Ca3-xBixCo4O9+δ (0.0 &lt; x &lt; 0.75)

Synthesis and thermoelectric properties of the new oxide materials Ca3-xBixCo4O9+δ (0.0 < x < 0.75)