热压法制备p型Bi-Sb-Te的力学和热电性能

2006 25th International Conference on Thermoelectrics Pub Date : 2006-08-01 DOI:10.1109/ICT.2006.331226

Xiaofeng Wu, Guiying Xu, Ya-dong Xu, Chunyan Zhang, C. Ge

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引用次数: 1

摘要

采用单轴热压法制备p型(Sb2Te3)75(Bi2Te3)25+xTe (x = 2,3,4,5, wt %)。本文对样品的性能进行了报道和讨论。用扫描电镜观察了典型的微观结构。通过对密度和弯曲强度的观察，分析了碲化物含量对强度的影响。测量了电导率和塞贝克系数，计算了功率因数，并分析了热电性能对碲化物的依赖性。通过分析发现，碲化物含量与合金的形貌、密度、抗弯强度和热电性能之间存在明显的相关性。掺4wt%碲化物的Bi-Sb-Te的功率因数最高，alpha = 0.209mV7K, sigma = 90.253(ω -mm)-1, alpha2sigma =3.951 mW/ k2middotm

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Mechanical and Thermoelectric Performance of p-type Bi-Sb-Te Prepared by Hot Pressing

P-type (Sb₂Te₃)₇₅(Bi₂Te₃)₂₅+xTe (x = 2, 3, 4, 5, wt %) was prepared by single-axis hot pressing. The performances of the samples were reported and discussed in this paper. SEM was made to observe the typical microstructure. Density and bending strength were observed for analyzing the dependence of content of telluride on strength. Electric conductivity and Seebeck coefficient were measured, power factor was calculated, and telluride dependence of thermoelectric properties was analyzed. By analysis, we found that there were evident relation among content of telluride dependence of morphology, density, bending strength and thermoelectric properties. Power factor of Bi-Sb-Te doped with 4wt% telluride was the highest, with alpha = 0.209mV7K, sigma = 90.253(Omega-mm)^-1, alpha²sigma =3.951 mW/K ²middotm

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2006 25th International Conference on Thermoelectrics

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