Power factor of La1-xSrxFeO3 and LaFe1-yNiyO3

被引：44

作者：

Iwasaki, Kouta

Ito, Tsuyoshi

Yoshino, Masahito

Matsui, Tsuneo

Nagasaki, Takanori

Arita, Yuji

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Mat Phys & ZEnergy Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 430卷 / 1-2期

关键词：

oxide materials; thermoelectric materials; solid state reaction; thermoelectric;

D O I：

10.1016/j.jallcom.2006.05.012

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：

The electrical conductivity (sigma), Seebeck coefficient (S), and power factor (sigma S-2) of perovskite-type LaFeO3, La1-xSrxFeO3 [0.1 <= x <= 0.4] and LaFe1-yNiyO3 [0.1 <= y <= 0.6] were investigated in the temperature range of 300-1100 K to explore their possibility as thermoelectric materials. The electrical conductivity of LaFeO3 showed semiconducting behavior, and its Seebeck coefficient changed from positive to negative around 650 K with increasing temperature. The electrical conductivity of LaFeO3 increased with the substitutions of Sr and Ni atoms, while its Seebeck coefficient decreased. The Seebeck coefficient of La1-xSrxFeO3 was positive, whereas that of LaFe1-yNiyO3 changed from positive to negative with increasing Ni content. The substitutions of Sr and Ni were effective in increasing the power factor of LaFeO3; 0.0053 x 10(-4) Wm(-1) K-2 for LaFeO3 (1050K), 1.1 x 10(-4) Wm(-1) K-2 for La1-xSrxFeO3 (x = 0.1 at 1100K) and 0.63 x 10(-4) Wm(-1) K-2 for LaFe1-yNiyO3 (y = 0.1 at 1100K). (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：297 / 301

页数：5

共 28 条

[1] La0.95Sr0.05CoO3:: An efficient room-temperature thermoelectric oxide [J].