Preparation and Thermoelectric Properties of Graphite/Bi0.5Sb1.5Te3 Composites

被引：12

作者：

Hu, Wenhua ^{[1
]}

Zhou, Hongyu ^{[1
]}

Mu, Xin ^{[1
]}

He, Danqi ^{[1
]}

Ji, Pengxia ^{[1
]}

Hou, Weikang ^{[1
]}

Wei, Ping ^{[1
]}

Zhu, Wanting ^{[1
]}

Nie, Xiaolei ^{[1
]}

Zhao, Wenyu ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2018年 / 47卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Bi0.5Sb1.5Te3; graphite; composite thermoelectric materials; thermoelectric properties; THERMAL-CONDUCTIVITY; HIGH-PERFORMANCE; NANOCOMPOSITES; NANOSTRUCTURES; FILLER; PBTE;

D O I：

10.1007/s11664-017-5908-8

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Bismuth telluride zone-melting alloys are the most commercially used thermoelectric materials. However, the zone-melting ingots have weak machinability due to the strong preferred orientation. Here, non-textured graphite/Bi0.5Sb1.5Te3 (G/BST) composites were prepared by a powder metallurgy method combined with cold-pressing and annealing treatments. The composition, microstructure, and thermoelectric properties of the G/BST composites with different mass percentages of G were investigated. It was found that G addition could effectively reduce the thermal conductivity and slightly improve the electrical properties of the BST, which resulted in a large enhancement in the figure-of-merit, ZT. The largest ZT for the xG/BST composites with x = 0.05% reached 1.05 at 320 K, which is increased by 35% as compared with that of the G-free BST materials. This work provided an effective method for preparing non-textured Bi2Te3-based TE materials with a simple process, low cost, and large potential in scale production.

引用

页码：3344 / 3349

页数：6

共 25 条

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