Thermoelectric properties of sinter-forged NaCo2O4

被引：6

作者：

Shin, W ^{[1
]}

Izu, N ^{[1
]}

Matsubara, I ^{[1
]}

Murayama, N ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST, Synergy Mat Res Ctr, Moriyama Ku, Nagoya, Aichi 4638560, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2003年 / 42卷 / 11期

关键词：

thermoelectric; layered cobalt oxide; thermal conductivity;

D O I：

10.1143/JJAP.42.7013

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thermoelectric properties of the polycrystal NaCo2O4 fabricated by the sinter-forging, method were investigated in the temperature range of 300-1060 K in air for high-temperature thermoelectric applications. The thermopower, electrical conductivity and thermal conductivity of the sinter-forged samples were evaluated for the same transport direction, and the highest value of figure-of-merit for the sinter-forged NaCo2O4 was 2.52 x 10(-4) K-1 at 1050 K in air. The measurement was also extended from 300 to 4 K. The microstructure of the NaCo2O4 was observed for the first time with high resolution and the high-angle grain boundary of Na-rich phase and the low-angle grain boundary are presented in this study.

引用

页码：7013 / 7017

页数：5

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