AgSbTe2 nanoinclusion in Yb0.2Co4Sb12 for high performance thermoelectrics

被引：17
|
作者：
Fu, Liangwei [1 ]
Yang, Junyou [1 ]
Xiao, Ye [1 ]
Peng, Jiangying [2 ]
Liu, Ming [1 ]
Luo, Yubo [1 ]
Li, Gen [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mound Technol, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, Wuhan 430074, Peoples R China
来源：
INTERMETALLICS | 2013年 / 43卷
基金：
中国国家自然科学基金;
关键词：
Composites; Thermoelectric properties; Thermal properties; Powder metallurgy; TRANSPORT-PROPERTIES; THERMAL-CONDUCTIVITY; HIGH FIGURE; BA;
D O I：
10.1016/j.intermet.2013.07.009
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Yb0.2Co4Sb12 based composites with AgSbTe2 nanoinclusion have been successfully prepared by a combined process of vacuum melting, pulverization and hot press sintering. XRD, FESEM, TEM and EDS were performed to characterize the microstructure and composition of the nanocomposites. It shows AgSbTe2 inclusions are about 50 nm in size and they distribute in the grain boundaries of Yb0.2Co4Sb12 filled skutterudite matrix. When the content of AgSbTe2 is less than 8wt%, Seebeck coefficient and electrical conductivity of the composites increase with increasing content of AgSbTe2, while the lattice thermal conductivity reduces with the increase of AgSbTe2 nanoinclusions. As a result, thermoelectric performance is improved with addition of AgSbTe2 nanoinclusion and a maximum ZT of 1.27 has been obtained for the sample of Yb0.2Co4Sb12/4wt%AgSbTe2 at about 300 degrees C. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：79 / 84
页数：6
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