Enhancement of ZT by incorporation of large single crystals of Ca3Co4O9 in a Ca3Co4O9

被引：2

作者：

Funahashi, R ^{[1
]}

Shikano, M ^{[1
]}

机构：

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

来源：

XXI INTERNATIONAL CONFERENCE ON THERMOELECTRICS, PROCEEDINGS ICT '02 | 2002年

关键词：

D O I：

10.1109/ICT.2002.1190301

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Recently, large single crystals of (Ca2CoO3)CoO2 (Co-349) possessing high thermoelectric properties have been synthesized using a flux method in a high yield of about 30%. This makes possible to prepare Co-349 composites consisting of Co-349 single crystals and powder. Electrical resistivity p of the composite including the single crystals of 20 wt.% is lower than that of the bulk material without the single crystals. Improvement of the grain alignment and an effect of current bypassing grain boundaries through the large single crystals in the composite may suppress rho and, in consequence, thermoelectric figure of merit ZT is elevated up to 0.55 at 973 K in air.

引用

页码：207 / 210

页数：4

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