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International Journal of Metallurgical & Materials Engineering Volume 3 (2017), Article ID 3:IJMME-131, 8 pages
http://dx.doi.org/10.15344/2455-2372/2017/131
Research Article
The Anisotropic High Thermoelectric Performance in (BixSb1-x)2Te3

D. Li*, X. Y. Qin*, X. G. Zhu, J. Zhang*, C. J. Song, H. X. Xin, X. F. Wang

Key Laboratory of Materials Physics, Institute of Solid State Physics Chinese Academy of Sciences, 230031 Hefei, P. R. China
Dr. D. Li, Key Laboratory of Materials Physics, Institute of Solid State Physics Chinese Academy of Sciences, 230031 Hefei, P. R. China; E-mail: lidi@issp.ac.cn
Dr. X. Y. Qin, Key Laboratory of Materials Physics, Institute of Solid State Physics Chinese Academy of Sciences, 230031 Hefei, P. R. China; E-mail: xyqin@issp.ac.cn
Dr. J. Zhang, Key Laboratory of Materials Physics, Institute of Solid State Physics Chinese Academy of Sciences, 230031 Hefei, P. R. China; E-mail: zhangjian@issp.ac.cn
04 January 2017; 04 March 2017; 07 March 2017
Li D, Qin XY, Zhu XG, Zhang J, Song CJ, et al. (2017) The Anisotropic High Thermoelectric Performance in (BixSb1-x)2Te3. Int J Metall Mater Eng 3: 131. doi: https://doi.org/10.15344/2455-2372/2017/131
This work was supported by Natural Science Foundation of China under grant No. 51672278, 11674322 and 11374306, AnHui Provincial Natural Science Foundation (No. 1608085MA17 and 1408085QB45) and Institute of Solid State Physics (2016DFS01).

Abstract

The anisotropy of thermoelectric properties for (BixSb1-x)2Te3 (0.16 ≤ x ≤ 0.24) are investigated in the temperature range of 300K to 523K. Anisotropy ratiosof the specimens are around 0.72-0.93 and 1.0-1.26 for the resistivity and the thermal conductivity, respectively. In addition, a relation of k k // /( 1f ) is found to hold, suggesting the validity of the rule of mixture for its k and f. The maximum ZT=1.37 (at 416K) are achieved for (Bi0.16Sb0.84)2Te3. Besides, (BixSb1-x)2Te3 sample shows good mechanical properties. The compression strength for (Bi0.16Sb0.84)2Te3 is 60MPa and 65MPa in the two measured directions, which is 6 folds and 1.6 times as larger as that of commercial ingot parallel and normal to the solidification direction, respectively.