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Enhanced thermoelectric properties of Ca1-x Sm x Mn1-y W y O3-δ for power generation

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Abstract

A series of Ca1-x Sm x Mn1-y W y O3-δ (0.05 ≤ x ≤ 0.25 and 0.05 ≤ y ≤ 0.2) was prepared by the solid-state reaction technique. The partial substitution of Sm3+ for Ca2+ and of W6+ for Mn4+ in CaMnO3-δ reduced the grain size and density. The substitution of Sm3+ and W6+ yielded a marked increase in electrical conductivity and a decrease in the absolute value of the Seebeck coefficient due to an increase in electron concentration. This gave rise to improved thermoelectric properties. A maximum power factor (2.07 × 10-4 Wm-1K-2) was obtained at 800°C for Ca0.9Sm0.1MnO3-δ . It is believed that the substitution of Sm3+ for Ca2+ is a promising approach for enhancing the thermoelectric performance of CaMnO3-δ .

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Authors and Affiliations

  1. Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 143-747, Korea

    J. W. Seo, J. S. Cha & K. Park

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  1. J. W. Seo
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  2. J. S. Cha
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  3. K. Park
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Correspondence to K. Park.

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Seo, J.W., Cha, J.S. & Park, K. Enhanced thermoelectric properties of Ca1-x Sm x Mn1-y W y O3-δ for power generation. Electron. Mater. Lett. 12, 113–120 (2016). https://doi.org/10.1007/s13391-015-5198-3

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  • DOI: https://doi.org/10.1007/s13391-015-5198-3

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