Thermoelectric properties of n-type (Bi2Se3)x(Bi2Te3)1-x prepared by bulk mechanical alloying and hot pressing

被引：154

作者：

Yang, JY ^{[1
]}

Aizawa, T ^{[1
]}

Yamamoto, A ^{[1
]}

Ohta, T ^{[1
]}

机构：

[1] Univ Tokyo, Adv Sci & Technol Res Ctr, High Performance Mat Lab, Tokyo 1538904, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 312卷 / 1-2期

关键词：

mechanical alloying; thermoelectric materials; hot pressing; bismuth telluride;

D O I：

10.1016/S0925-8388(00)01159-2

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：

Starting from element Bi, Se and Te granules, n-type (Bi2Se3)(x)(Bi2Te3)(1-x) with different chemical composition (x=0.025, 0.05, 0.075, 0.10 and 0.15) were prepared via bulk mechanical alloying (BMA) and hot pressing (PIP). Effects of chemical composition, doping content and annealing on thermoelectric properties were reported. The range x less than or equal to0.050 is more favorable than other chemical compositions for the thermoelectric properties of BMAed (Bi2Se3)(x)(Bi2Te3)(1-x). When doping with SbI3, both the electrical resistivity and the Seebeck coefficient of (Bi2Se3)(0.05)(Bi2Te3)(0.95) decrease, thus resulting in no improvement of the figure of merit. On the other hand, annealing the as-HPed (Bi2Se3)(0.05)(Bi2Te3)(0.95) a sufficiently long time is helpful to improve thermoelectric properties, and the maximum figure of merit of (Bi2Se3)(0.05)(Bi2Te3)(0.95) is 2.31x10(-3)/K. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：326 / 330

页数：5

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