Preparation and thermoelectric properties of Bi2SexTe3-x bulk materials

被引：7

作者：

Zheng, Jianping ^{[1
,2
]}

Chen, Song ^{[1
,2
,3
]}

Cai, Kefeng ^{[1
,2
]}

Yin, Junlin ^{[1
,2
]}

Shen, Shirley ^{[4
]}

机构：

[1] Tongji Univ, Key Lab Adv Civil Engn Mat Educ, 4800 Caoan Rd, Shanghai 201804, Peoples R China

[2] Tongji Univ, Sch Mat Sci & Engn, 4800 Caoan Rd, Shanghai 201804, Peoples R China

[3] Fujian Univ Technol, Sch Mat Sci & Engn, Fuzhou 350108, Peoples R China

[4] CSIRO Mfg, Gate 5,Normanby Rd, Clayton, Vic 3168, Australia

来源：

CERAMICS INTERNATIONAL | 2017年 / 43卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Thermoelectric; Bi2Te3; Bi2Se3; Microwave-assisted wet chemical method; Bi2SexTe3-x; MICROWAVE-ASSISTED SYNTHESIS; MECHANICAL-PROPERTIES; ELECTRODEPOSITION; PERFORMANCE; ENERGY;

D O I：

10.1016/j.ceramint.2017.01.085

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Bi2Te3 and Bi2Se3 nanoplates were synthesized by a microwave-assisted wet chemical method, and Bi2SexTe3-x (x=1, 2, 3) bulk nanocomposites were then prepared by hot pressing the Bi2Te3 and Bi2Se3 nanoplates at 80 MPa and 723 K in vacuum. The phase composition and microstructures of the bulk samples were characterized by powder X-ray diffraction and field-emission scanning electron microscopy, respectively. The electrical conductivity of the Bi(2)SexTe(3-x) bulk nanocomposites increases with increasing Se content, and the Seebeck coefficient value is negative, showing n-type conduction. The absolute Seebeck coefficient value decreases with increasing Se content. A highest power factor, 24.5 mu Wcm(-1) K-2, is achieved from the sample of x=1 at 369 K among the studied samples.

引用

页码：5920 / 5924

页数：5

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