Microstructure and thermoelectric properties of Bi-Sb-Te bulk materials fabricated from rapidly solidified powders

被引：15
作者：
Wang, Zhi-Lei [1 ]
Akao, Takahiro [2 ]
Onda, Tetsuhiko [1 ]
Chen, Zhong-Chun [1 ]
机构：
[1] Tottori Univ, Grad Sch Engn, Dept Mech & Aerosp Engn, Koyama Minami 4-101, Tottori 6808552, Japan
[2] Fukushima Coll, Dept Mech Engn, Natl Inst Technol, Nagao 30, Iwaki, Fukushima 9708034, Japan
来源：
SCRIPTA MATERIALIA | 2017年 / 136卷
关键词：
Bismuth telluride; Microstructure; Thermoelectric materials; Rapid solidification; Spark plasma sintering; ELECTRICAL-PROPERTIES; DEFORMATION; BI2TE3;
D O I：
10.1016/j.scriptamat.2017.04.032
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A rapid solidification and spark plasma sintering technique was applied to fabricate Bi-Sb-Te bulk thermoelectric materials. Although the grain boundaries in sintered samples were primarily composed of large-angle boundaries, a large fraction of small-angle boundaries was found at a high sintering temperature. As the sintering temperature increased, the Seebeck coefficient was almost unchanged while the electrical resistivity gradually decreased. The thermal conductivity gently increased till 420 degrees C, and then abruptly increased. As a result, the largestZTvalue of 1.1 was achieved for the sample sintered at 400 degrees C, which is increased by 44.7% compared with that prepared from mechanically alloyed powders. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：111 / 114
页数：4
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