Thermoelectric properties of P-type(Bi0.26Sb0.74)2Te3+3%Te ingots prepared by vacuum melting

被引：10
|
作者：
Xu, Zhijun [1 ]
Yang, Junyou [1 ]
Xiao, Ye [1 ]
Li, Gen [1 ]
Zhang, Jian Sheng [1 ]
Peng, Jiangying [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, 1037 Luoyu Rd, Wuhan 430074, Peoples R China
来源：
2011 CHINESE MATERIALS CONFERENCE | 2012年 / 27卷
关键词：
Thermoelectric materials; Bismuth telluride; Vacuum melting; Thermoelectric properties; BISMUTH TELLURIDE; ALLOYS;
D O I：
10.1016/j.proeng.2011.12.435
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
P-type(Bi0.26Sb0.74)(2)Te-3+3% Te ingots were prepared by cooling at various cooling rates after vacuum melting. In this paper, the chemical composition, structure and thermoelectric properties of the crystals were evaluated by XRD, SEM, EDAX and thermoelectric measurements including Seebeck coefficient, electrical conductivity and thermal conductivity. With increase of cooling rates, Te-rich phase presents in the crystals, the electrical conductivity increases and the Seebeck coefficient decreases. While thermal conductivities of all ingots are all lower than 1.3W/mK. The maximum ZT (T=298K) was 1.12, which was obtained in the p-type(Bi0.26Sb0.74)(2)Te-3+3% Te ingot prepared at a cooling rate of 4K/min. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Chinese Materials Research Society Open access under CC BY-NC-ND license.
引用
收藏
页码：137 / 143
页数：7
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