期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 100, 期 8, 页码 3608-3617出版社
WILEY
DOI: 10.1111/jace.14898
关键词
electrical conductivity; oxides; powders; sinter/sintering; thermoelectric properties
资金
- Ministry of Science, ICT and Future Planning [2014R1A2A1A11054566]
- National Research Foundation of Korea [2014R1A2A1A11054566] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ca0.8Y0.2-xDyxMnO3-delta (0 <= x <= 0.2) samples were fabricated by the solid-state reaction method, and their thermoelectric properties were studied from 500 degrees C to 800 degrees C. Upon the substitution of Dy3+ for Y3+ in the Ca0.8Y0.2-xDyxMnO3-delta, the electrical and thermal conductivities gradually decreased with increasing Dy3+ concentration, whereas the absolute value of the Seebeck coefficient significantly increased. The Ca0.8Y0.2-xDyxMnO3-delta showed the largest value of dimensionless figure of merit (0.180) at 800 degrees C as a result of the combination of the largest absolute value of the Seebeck coefficient and the lowest thermal conductivity. We believe that the Ca0.8Y0.2-xDyxMnO3-delta is a promising thermoelectric material at high temperatures.
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