Fabrication and thermoelectric characteristics of [(Bi,Pb)2Ba2O4±w]0.5CoO2 bulks with highly aligned grain structure

被引：22

作者：

Motohashi, T. ^{[1
]}

Nonaka, Y. ^{[1
]}

Sakai, K. ^{[1
]}

Karppinen, M. ^{[1
]}

Yamauchi, H.

机构：

[1] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 03期

基金：

芬兰科学院; 日本学术振兴会;

关键词：

D O I：

10.1063/1.2838161

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Here, we report fabrication and thermoelectric characteristics of polycrystalline bulks with aligned grains of the misfit-layered cobalt oxides, [(Bi1-xPbx)(2)Ba2O4 +/- w](0.5)CoO2. High-quality precursor powder was prepared with a spray-drying technique. The precursor was then sintered under a uniaxial pressure to yield dense bulk samples consisting of highly aligned grains. The electrical conductivity of such samples was four times higher than that of conventionally sintered bulks. Accordingly, the thermoelectric characteristics of the grain-aligned specimens were enhanced. (C) 2008 American Institute of Physics.

引用

页数：6

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