Enhanced thermoelectric properties of n-type NbCoSn half-Heusler by improving phase purity

被引：74
|
作者：
He, Ran [1 ,2 ]
Huang, Lihong [3 ]
Wang, Yumei [1 ,2 ,4 ]
Samsonidze, Georgy [5 ]
Kozinsky, Boris [5 ]
Zhang, Qinyong [3 ]
Ren, Zhifeng [1 ,2 ]
机构：
[1] Univ Houston, Dept Phys, Houston, TX 77204 USA
[2] Univ Houston, TcSUH, Houston, TX 77204 USA
[3] Xihua Univ, Ctr Adv Mat & Energy, Chengdu 610039, Sichuan, Peoples R China
[4] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100190, Peoples R China
[5] Robert Bosch LLC, Res & Technol Ctr, Cambridge, MA 02139 USA
来源：
APL MATERIALS | 2016年 / 4卷 / 10期
基金：
美国国家科学基金会;
关键词：
FIGURE; MERIT; CONVERGENCE;
D O I：
10.1063/1.4952994
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Here we report the thermoelectric properties of NbCoSn-based n-type half-Heuslers (HHs) that were obtained through arc melting, ball milling, and hot pressing process. With 10% Sb substitution at the Sn site, we obtained enhanced n-type properties with a maximum power factor reaching similar to 35 mu W cm(-1) K-2 and figure of merit (ZT) value similar to 0.6 in NbCoSn0.9Sb0.1. The ZT is doubled compared to the previous report. In addition, the specific power cost ($ W-1) is decreased by similar to 68% comparing to HfNiSn-based n-type HH because of the elimination of Hf. (C) 2016 Author(s).
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页数：9
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