Thermoelectric properties of GdBaCo2-x Fe x O5+δ ceramics

被引：4
作者：
Gao, Feng [1 ]
Zhang, Jing [2 ]
Song, Hongzhang [1 ]
Qin, Zhen [2 ]
Yang, Delin [1 ]
Hu, Xing [1 ]
机构：
[1] Zhengzhou Univ, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Peoples R China
[2] North China Univ Water Conservancy & Elect Power, Coll Math & Informat Sci, Zhengzhou 450011, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2013年 / 24卷 / 08期
基金：
中国国家自然科学基金;
关键词：
ELECTRONIC TRANSPORT-PROPERTIES; SPIN-STATE TRANSITION; OXIDE; DIFFUSION; CATHODE;
D O I：
10.1007/s10854-013-1216-0
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The influence of Fe doping on the lattice structure and thermoelectric properties of GdBaCo2-x Fe (x) O5+delta (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) ceramics was studied from room temperature to 525 K. The results show that presence of Fe will increase both electrical resistivity and Seebeck coefficients of the samples. Due to the lattice misfit and carrier concentration reduction caused by Fe, the thermal conductivity of the sample decreases. The activation energy of conductivity is larger than that of thermopower calculated in the semiconductive region, which means that the conduction mechanism may be determined as a small polaron hopping model. The optimum Fe doping amount is x = 0.6, which results in a ZT value 0.02 at 373 K.
引用
收藏
页码：3095 / 3100
页数：6
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