Electrical transport and thermoelectric properties of Ca0.8Y0.2xDyxMnO3d (0 ≤ x ≤ 0.2)

Title
Electrical transport and thermoelectric properties of Ca0.8Y0.2xDyxMnO3d (0 ≤ x ≤ 0.2)
Authors
원성옥Jang Woo SeoJaesung ChaKyeongsoon Park
Keywords
electrical conductivity; oxides; powders; sinter/sintering; thermoelectric properties; XRD; Rietveld refinement
Issue Date
2017-08
Publisher
Journal of the American Ceramic Society
Citation
VOL 100, NO 8-3617
Abstract
Ca0.8Y0.2 xDyxMnO3 d (0≤x≤0.2) samples were fabricated by the solid-state reaction method, and their thermoelectric properties were studied from 500°C to 800°C. Upon the substitution of Dy3+ for Y3+ in the Ca0.8Y0.2 xDyxMnO3 d, the electrical and thermal conductivities gradually decreased with increasing Dy3+ concentration, whereas the absolute value of the Seebeck coefficient significantly increased. The Ca0.8Dy0.2MnO3 d showed the largest value of dimensionless figure of merit (0.180) at 800°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 Ca0.8Dy0.2MnO3 d is a promising thermoelectric material at high temperatures.
URI
http://pubs.kist.re.kr/handle/201004/66053
ISSN
0002-7820
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