Thermoelectric properties of directionally solidified Bi2Te 3 alloys under high thermal gradient

Song Ke Feng, Shuang Ming Li, Qing Yan Luo, Heng Zhi Fu

科研成果: 书/报告/会议事项章节会议稿件同行评审

6 引用 (Scopus)

摘要

Thermoelectric Bi2Te3 bulk alloys were directionally solidified successfully at the pulling rate ranging from 1 μm/s to 50 μm/s under a high temperature gradient of 200 K/cm. Preferred crystal orientations of (0 1 5), (1 0 10) and (1 1 0) faces appeared at the pulling rate of 50 μm/s. In the Bi2Te3 alloys directionally solidified at 5 μm/s, the maximum Seebeck coefficient of -253 μV/K was obtained and the maximum electrical resistivity of 2.26 mΩ•cm was measured at 300 K. Besides, the optimum Power Factor (PF) value reached 3.83×10-3 W/K2m at 1 μm/s and the measured results show that the thermoelectric Bi2Te3 bulk alloys grown at low growth rates supply the large PF value at ambient temperate, while at high temperature, the alloy grown at 50 μm/s has a better PF value.

源语言英语
主期刊名New and Advanced Materials
1109-1112
页数4
DOI
出版状态已出版 - 2011
活动2nd International Conference on Manufacturing Science and Engineering, ICMSE 2011 - Guilin, 中国
期限: 9 4月 201111 4月 2011

出版系列

姓名Advanced Materials Research
197-198
ISSN(印刷版)1022-6680

会议

会议2nd International Conference on Manufacturing Science and Engineering, ICMSE 2011
国家/地区中国
Guilin
时期9/04/1111/04/11

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