Microstructure and thermoelectric properties of n-type Bi2Te2.85Se0.15 prepared by mechanical alloying and plasma activated sintering

被引：49

作者：

Fan, X. A.

Yang, J. Y.

Zhu, W.

Yun, H. S.

Chen, R. G.

Bao, S. Q.

Duan, X. K.

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Plast Forming Simulat & Dies Techno, Wuhan 430074, Peoples R China

[2] Wuhan Univ Sci & Technol, Mat Res & Test Ctr, Wuhan 430070, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 420卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

thermoelectric materials; Bi2Te3-Bi2Se3; grain orientation; plasma activated sintering; mechanical alloying;

D O I：

10.1016/j.jallcom.2005.10.025

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 elemental bismuth, tellurium and selenium powders, n-type Bi2Te2.85Se0.15 solid solution with fine microstructure was prepared by mechanical alloying (MA) and plasma activated sintering (PAS) in the present work. The effect of PAS process on microstructure and thermoelectric properties of the sintered samples was investigated. The sintering temperature of PAS process (683 K) was 80-100 K lower than that of conventional hot pressing and the whole PAS process was also greatly shortened to about 30 min. A preferentially orientated microstructure with the basal planes (0 0 l) perpendicular to pressing direction was formed in the PASed sample and the maximum figure of merit (Z) at room temperature was 1.80 x 10(-3) K-1. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：256 / 259

页数：4

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