Influence of Ag doping on thermoelectric properties of BiCuSeO

被引：81
作者：
Liu, Yao-chun [1 ,2 ]
Zheng, Yuan-hua [1 ]
Zhan, Bin [1 ]
Chen, Kai [1 ]
Butt, Sajid [1 ]
Zhang, Boping [2 ]
Lin, Yuan-hua [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 02期
基金：
中国国家自然科学基金;
关键词：
BiCuSeO; Thermoelectric; Ag doping; PERFORMANCE; FIGURE; MERIT; OXYSELENIDES; OXIDE;
D O I：
10.1016/j.jeurceramsoc.2014.09.015
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of Ag doping on the thermoelectric properties of p-type BiCuSeO ceramics from 300 to 873 K has been investigated systematically. The electrical conductivity can be improved from 5.9 to 26.9 S cm(-1) at room temperature with Ag doping. The Seebeck coefficients of Bi1-xAgxCuSeO increase monotonically with temperature in all temperature range. The thermal conductivity can be suppressed significantly due to grain refinement and nanoinclusions. A maximum power factor of 320 mu W m(-1) K-2 was obtained at 873 K. The combination of optimized power factor and low thermal conductivity resulted to a higher ZT value of 0.68 at 873 K for Bi0.92Ag0.08CuSeO which is about 30% higher than that of the un-doped specimen. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：845 / 849
页数：5
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