Thermoelectric Properties of Ca1−x−y Dy x Ce y MnO3 for Power Generation
Abstract:The sintered Ca1−x−y Dy x Ce y MnO3 bodies were a single phase with a perovskite structure without any impurity phases. The calculated crystallite sizes of the Ca1−x−y Dy x Ce y MnO3 were in the range of 43.3 to 63.3 nm. The composition significantly affected their microstructural and thermoelectric characteristics. The doped Dy led to both an increase in the electrical conductivity as well as the absolute value of the Seebeck coefficient, resulting in an enhanced power factor. The highest power factor (5.1 × 10−4 Wm−1 K−2) was obtained for Ca0.8Dy0.2MnO3 at 800 °C. In this study, we systematically discussed the thermoelectric properties of the Ca1−x−y Dy x Ce y MnO3, with respect to the substitution of Dy and/or Ce for Ca.
Document Type: Research Article
Publication date: 2011-08-01
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