Thermoelectric properties of spark plasma sintered Ca2.75Gd0.25Co4O9 ceramics

被引：86

作者：

Matsubara, I ^{[1
]}

Funahashi, R ^{[1
]}

Takeuchi, T ^{[1
]}

Sodeoka, S ^{[1
]}

机构：

[1] Osaka Natl Res Inst, Osaka 5638577, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2001年 / 90卷 / 01期

关键词：

D O I：

10.1063/1.1378056

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spark plasma sintering (SPS) was applied for preparing dense Ca2.75Gd0.25Co4O9 ceramics, and their thermoelectric properties were investigated from room temperature to 700 degreesC in air. The SPS process was effective in obtaining dense Ca2.75Gd0.25Co4O9 ceramics, typically 98% of the theoretical x-ray density, with lower resistivity, without any degradation of the thermoelectric power. The power factor and figure of merit of the spark plasma sintered samples attain 4.8x10(-4) W m(-1) K-2 and ZT=0.23 at 700 degreesC, respectively. (C) 2001 American Institute of Physics.

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页码：462 / 465

页数：4

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