Thermoelectric properties of n-type 95%Bi2Te3-5%Bi2Se3 compounds fabricated by gas-atomization and spark plasma sintering

被引：40

作者：

Kim, Hyo-Seob ^{[1
]}

Hong, Soon-Jik ^{[1
]}

机构：

[1] Kongju Natl Univ, Div Adv Mat Engn, Chungnam 331717, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 586卷

基金：

新加坡国家研究基金会;

关键词：

Thermoelectric properties; Bi2Te3; Gas atomization; Spark plasma sintering (SPS); P-TYPE BI2TE3-SB2TE3; RAPID SOLIDIFICATION; BISMUTH TELLURIDE; MICROSTRUCTURE; ALLOY;

D O I：

10.1016/j.jallcom.2013.05.163

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, n-type 95%Bi2Te3-5%Bi2Se3 doped with 0.04% SbI3 thermoelectric materials was fabricated by gas-atomization and spark plasma sintering (SPS) at a temperature range of 623-723 K. The microstructure of the gas atomized powder shows spherical shape, fine particle size and homogeneously distributed grains. The density of the sintered bulk reached nearly 100% of the theoretical density, where micro Vickers Hardness was found around 54-57 Hv. The Seebeck coefficient (alpha) of the sintered bulk decreased while electrical resistivity and thermal conductivity (kappa) increased with increasing sintering temperature to 723 K, resulting in a decrease in figure of merit. The maximum figure of merit (ZT) was 0.76, which was obtained in the sintered bulk at 623 K. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：S428 / S431

页数：4

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