Thermoelectric properties of Sm1-xLaxBaCuFeO5 ceramics

被引：4
作者：
Zeng, Chengcheng [1 ]
Liu, Yaochun [2 ]
Lan, Jinle [3 ]
Ren, Guangkun [1 ]
Lin, Yuanhua [1 ]
Li, Ming [1 ]
Nan, Cewen [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
[2] Univ Sci & Technol, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[3] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2015年 / 69卷
关键词：
Ceramics; X-ray diffraction; Electrical properties; Thermal conductivity; Thermoelectrics; OXYGEN-DEFICIENT PEROVSKITE; TRANSPORT-PROPERTIES; PERFORMANCE; FIGURE; MERIT; CA; LA; SM; ND;
D O I：
10.1016/j.materresbull.2014.10.046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
La-doped SmBaCuFeO5 polycrystalline ceramics have been prepared through sol-gel method followed by solid-state sintering reaction. A significant enhancement in the thermoelectric properties of SmBaCuFeO5 has been achieved by La doping. Our results reveal that the La doping can lead to a remarkable increase in the electrical conductivity of 2 orders of magnitude. The Seebeck coefficient decreases with increasing La content, which is consistent with the increased electrical conductivity. Thermal conductivity at room temperature decreases from 2.1 W m(-1) K-1 to 1.7 W m(-1) K-1 due to the existence of nano-sized grains in the high substitutive content samples. The maximum ZT of 0.042 at 1023 K is obtained for Sm0.6La0.4BaCuFeO5, which is 13 times more than that of the pristine sample. (C) 2014 Elsevier Ltd. All rights reserved.
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收藏
页码：46 / 50
页数：5
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