High Temperature Thermoelectric Properties of Dy-doped CaMnO3 Ceramics
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2014年第8期
论文作者：Bin Zhan Jinle Lan Yaochun Liu Yuanhua Lin Yang Shen Cewen Nan
文章页码：821 - 825
摘 要：Dy-doped CaMnO3 ceramics have been synthesized by co-precipitation method combined with the solid-state reaction.Phase composition and microstructure analysis indicate that high density and pure CaMnO3 phase can be achieved.The electric conductivity can be enhanced by Dy doping,and result in a slight increase of the thermal conductivity.The highest dimensionless figure of merit ZT of 0.15 has been obtained at 973 K for x = 0.02 sample,which is about 4 times larger than that of the pure CaMnO3,which indicate that CaMnO3can be a promising candidate for n-type thermoelectric material at high temperature.
Bin Zhan1，Jinle Lan1，Yaochun Liu2，Yuanhua Lin1，Yang Shen1，Cewen Nan1
1. State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University2. School of Materials Science and Engineering,University of Science and Technology Beijing
摘 要：Dy-doped CaMnO3 ceramics have been synthesized by co-precipitation method combined with the solid-state reaction.Phase composition and microstructure analysis indicate that high density and pure CaMnO3 phase can be achieved.The electric conductivity can be enhanced by Dy doping,and result in a slight increase of the thermal conductivity.The highest dimensionless figure of merit ZT of 0.15 has been obtained at 973 K for x = 0.02 sample,which is about 4 times larger than that of the pure CaMnO3,which indicate that CaMnO3can be a promising candidate for n-type thermoelectric material at high temperature.
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