Thermoelectric properties of p-type Pb-doped Bi85Sb15-xPbx alloys at cryogenic temperatures

被引:13
作者
Chen, Z. [1 ,2 ]
Zhou, M. [1 ]
Huang, R. J. [1 ]
Song, C. M. [3 ]
Zhou, Y. [1 ]
Li, L. F. [1 ]
机构
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Zunyi Normal Coll, Dept Phys, Zunyi 563002, Peoples R China
基金
中国国家自然科学基金;
关键词
Thermoelectric materials; Mechanical alloying; Electrical transport; Thermal conductivity; TRANSPORT-PROPERTIES; POTENTIAL MATERIALS; FIGURE;
D O I
10.1016/j.jallcom.2011.08.076
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this study we have investigated the effect of the Pb on the thermoelectric propertied of Bi-Sb alloy with different Pb-content. The Pb-doped Bi85Sb15-xPbx (x = 0, 0.5, 1, 2, 3) alloys were synthesized by mechanical alloying followed by pressureless sintering. The crystal structure was characterized by X-ray diffraction. The Seebeck coefficients, electrical conductivities, and thermal conductivities were measured in the temperature range of 77-300 K. The results show that all the Pb-doped alloys are p-type thermoelectric materials in the whole measurement temperature range. A minimum thermal conductivity of 1.7 W/mK was obtained for Bi85Sb12Pb3 sample at 150 K. A maximum ZT value of 0.11, which is higher than those previous reported, was obtained for Bi85Sb14Pb1 at 210 K. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码:85 / 89
页数:5
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