Suppression of bipolar transport and enhanced zT values of porous ZnSb by addition of hydrothermally synthesized Sb

被引：17

作者：

Chu, Yu-Hsien ^{[1
]}

Huang, Zhi-Quan ^{[1
]}

Yang, Zong-Ren ^{[1
]}

Lin, Fei-Hung ^{[1
]}

Chang, Kuo-Chuan ^{[1
]}

Suriakarthick, R. ^{[2
]}

Liu, Chia-Jyi ^{[1
]}

机构：

[1] Natl Changhua Univ Educ, Dept Phys, Changhua 500, Taiwan

[2] Univ Madras, Dept Nucl Phys, Guindy Campus, Chennai 25, Tamil Nadu, India

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2019年 / 39卷 / 14期

关键词：

ZnSb; Thermoelectrics; Composite; Transport mechanism; Additives; THERMOELECTRIC PROPERTIES; TEMPERATURES;

D O I：

10.1016/j.jeurceramsoc.2019.06.033

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：

ZnSb is a favourable eco-friendly, earth abundant SIand low cost thermoelectric material. We herein report a feasible approach to improve the thermoelectric performance of ZnSb by compositing with hydrothermally synthesized Sb. A series of ZnSb/Sb composites was fabricated by mixing the host material ZnSb and hydro thermally synthesized Sb followed by consolidation using cold pressing and evacuating-and-encapsulating sintering at 530 degrees C for 3 h. As compared to the host ZnSb, both the electrical resistivity and thermopower decrease, while both the power factor and thermal conductivity increase upon compositing with Sb. The bipolar transport of ZnSb is suppressed at temperatures up to 600 K. As a result, the ZnSb-Sb composite with 4 wt.% of hydro thermally synthesized Sb has a zT = 1.18 at 600 K, which is one of the highest values for ZnSb-based material and is about 46% enhancement as compared to the host ZnSb having zT = 0.81 at 600 K.

引用

页码：4177 / 4183

页数：7

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