High-temperature electrical transport behaviors of the layered Ca2Co2O5-based ceramics

被引：40

作者：

Lan, Jinle ^{[1
]}

Lin, Yuan-Hua ^{[1
]}

Li, Guo-jing ^{[2
]}

Xu, Shaoliang ^{[3
]}

Liu, Yong ^{[3
]}

Nan, Ce-Wen ^{[1
]}

Zhao, Shu-Jin ^{[2
]}

机构：

[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

[2] Jiamusi Univ, Coll Mat Sci & Engn, Heilongjiang 154007, Peoples R China

[3] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 19期

基金：

国家高技术研究发展计划(863计划);

关键词：

bismuth compounds; calcium compounds; ceramics; cobalt compounds; electrical conductivity; thermoelectricity; THERMOELECTRIC PROPERTIES; OXIDES; CA3CO4O9;

D O I：

10.1063/1.3425891

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Textured Bi-substituted Ca2Co2O5 ceramics have been prepared using a coprecipitation method combined with spark plasma sintering. The Bi substitution is effective in increasing the grain orientation of the Ca2Co2O5-based ceramics (from 0.46 to 0.85). Electrical conductivity increases obviously with partial substitution of Bi3+ for Ca2+ (from 113.9 to 142.4 S/cm at 973 K). The Ca1.92Bi0.08Co2O5 sample exhibits higher power factor (4.4 x 10(-4) W m(-1) K-2) than that of pure Ca2Co2O5 (3.2 x 10(-4) W m(-1) K-2) at 973 K, indicating that the Ca2Co2O5 system is another promising p-type material for high-temperature thermoelectric applications. (C) 2010 American Institute of Physics. [doi:10.1063/1.3425891]

引用

页数：3