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Title: Influence of rare-earth elements doping on thermoelectric properties of Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} at high temperature

Abstract

Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} and Ca{sub 0.96}Dy{sub 0.02}Re{sub 0.02}MnO{sub 3} (Re=La, Pr, Sm, Eu, Ho, and Yb) have been synthesized by the solid state reaction method. Samples with relative densities all over 96% have been obtained. Thermoelectric properties are evaluated between 300 and 1000 K. The electrical resistivity shows a typical metal-like conductivity behavior, and at high temperature, 973 K, decreases from 36.1 mΩ cm for Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} to 8.6 mΩ cm for Ca{sub 0.96}Dy{sub 0.02}Yb{sub 0.02}MnO{sub 3}. Both the absolute values of Seebeck coefficient and thermal conductivity are reduced by the introduction of second rare-earth element. The highest power factor of 415 μW/(K{sup 2}m) is obtained for Ca{sub 0.96}Dy{sub 0.02}Yb{sub 0.02}MnO{sub 3} sample, resulting in the highest dimensionless figure of merit (ZT) 0.25 at 973 K. This value shows an improvement of 144% compared with that of Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} ceramics at the same temperature. - Graphical abstract: The Ca{sub 0.96}Dy{sub 0.02}Re{sub 0.02}MnO{sub 3} (Re=La, Pr, …, Yb) were prepared by solid state reaction. Highest ZT value obtained is 0.25 at 973 K for Re=Yb, which shows 144% improvement compared with Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3}. - Highlights: • Ca{sub 0.96}Dy{sub 0.02}Re{sub 0.02}MnO{sub 3} (Re=La, Pr, …,more » Yb) are produced by solid state reaction. • Lowest resistivity is obtained due to the highest carrier mobility for Re=Yb. • Highest power factor obtained is 415 μW/(K{sup 2}m) at 973 K for Re=Yb. • Highest ZT value obtained is 0.25 at 973 K for Ca{sub 0.96}Dy{sub 0.02}Yb{sub 0.02}MnO{sub 3} sample.« less

Authors:
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Publication Date:
OSTI Identifier:
22475583
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 225; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CALCIUM COMPOUNDS; CARRIER MOBILITY; CERAMICS; COMPARATIVE EVALUATIONS; DYSPROSIUM COMPOUNDS; ELECTRIC CONDUCTIVITY; HOLMIUM COMPOUNDS; LANTHANUM COMPOUNDS; MANGANATES; SAMARIUM COMPOUNDS; SEEBECK EFFECT; SINTERING; SOLIDS; THERMAL CONDUCTIVITY; THERMOELECTRIC PROPERTIES

Citation Formats

Zhu, Yuanhu, E-mail: yuanhuzhu@126.com, Wang, Chunlei, Su, Wenbin, Liu, Jian, Li, Jichao, Zhang, Xinhua, and Mei, Liangmo. Influence of rare-earth elements doping on thermoelectric properties of Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} at high temperature. United States: N. p., 2015. Web. doi:10.1016/J.JSSC.2014.12.010.
Zhu, Yuanhu, E-mail: yuanhuzhu@126.com, Wang, Chunlei, Su, Wenbin, Liu, Jian, Li, Jichao, Zhang, Xinhua, & Mei, Liangmo. Influence of rare-earth elements doping on thermoelectric properties of Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} at high temperature. United States. doi:10.1016/J.JSSC.2014.12.010.
Zhu, Yuanhu, E-mail: yuanhuzhu@126.com, Wang, Chunlei, Su, Wenbin, Liu, Jian, Li, Jichao, Zhang, Xinhua, and Mei, Liangmo. Fri . "Influence of rare-earth elements doping on thermoelectric properties of Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} at high temperature". United States. doi:10.1016/J.JSSC.2014.12.010.
@article{osti_22475583,
title = {Influence of rare-earth elements doping on thermoelectric properties of Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} at high temperature},
author = {Zhu, Yuanhu, E-mail: yuanhuzhu@126.com and Wang, Chunlei and Su, Wenbin and Liu, Jian and Li, Jichao and Zhang, Xinhua and Mei, Liangmo},
abstractNote = {Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} and Ca{sub 0.96}Dy{sub 0.02}Re{sub 0.02}MnO{sub 3} (Re=La, Pr, Sm, Eu, Ho, and Yb) have been synthesized by the solid state reaction method. Samples with relative densities all over 96% have been obtained. Thermoelectric properties are evaluated between 300 and 1000 K. The electrical resistivity shows a typical metal-like conductivity behavior, and at high temperature, 973 K, decreases from 36.1 mΩ cm for Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} to 8.6 mΩ cm for Ca{sub 0.96}Dy{sub 0.02}Yb{sub 0.02}MnO{sub 3}. Both the absolute values of Seebeck coefficient and thermal conductivity are reduced by the introduction of second rare-earth element. The highest power factor of 415 μW/(K{sup 2}m) is obtained for Ca{sub 0.96}Dy{sub 0.02}Yb{sub 0.02}MnO{sub 3} sample, resulting in the highest dimensionless figure of merit (ZT) 0.25 at 973 K. This value shows an improvement of 144% compared with that of Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3} ceramics at the same temperature. - Graphical abstract: The Ca{sub 0.96}Dy{sub 0.02}Re{sub 0.02}MnO{sub 3} (Re=La, Pr, …, Yb) were prepared by solid state reaction. Highest ZT value obtained is 0.25 at 973 K for Re=Yb, which shows 144% improvement compared with Ca{sub 0.98}Dy{sub 0.02}MnO{sub 3}. - Highlights: • Ca{sub 0.96}Dy{sub 0.02}Re{sub 0.02}MnO{sub 3} (Re=La, Pr, …, Yb) are produced by solid state reaction. • Lowest resistivity is obtained due to the highest carrier mobility for Re=Yb. • Highest power factor obtained is 415 μW/(K{sup 2}m) at 973 K for Re=Yb. • Highest ZT value obtained is 0.25 at 973 K for Ca{sub 0.96}Dy{sub 0.02}Yb{sub 0.02}MnO{sub 3} sample.},
doi = {10.1016/J.JSSC.2014.12.010},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 225,
place = {United States},
year = {2015},
month = {5}
}