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Thermoelectric Properties of the Perovskite-Type Oxide SrTi1−xNbxO3 Synthesized by Solid-State Reaction Method

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Abstract

The perovskite-type oxide materials SrTi1−xNbxO3 (X  = .02, 0.03, 0.04, 0.05 and 0.06) were synthesized by the conventional solid-state reaction method and the thermoelectric properties in terms of Nb doping at the B-site in the oxides were investigated in this study. The formation of single phase cubic perovskite structure was confirmed by the powder X-ray diffraction analysis. Negative conduction is shown in this materials system. The absolute value of Seebeck coefficient increased with increasing temperature over the measured temperature. The electrical conductivity decreased monotonically with increasing temperature, showing degenerating conduction behavior. The thermal conductivity, k, generally decreased with increasing temperature. The power factor increased with increasing Nb-doping level up to 5.0 mol% and hence the dimensionless figure of merit ZT, increased up to 5.0 mol%. The maximum ZT value was observed for SrTi0.95Nb0.05O3 at 873 K.

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Acknowledgements

This work was supported by a grant from the Regional Innovation Center (RIC) Program conducted by the Ministry of Trade, Industry and Energy of the Korean Government.

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  1. Department of Materials Science and Engineering and Research Center for Sustainable Eco-Devices and Materials (ReSEM), Korea National University of Transportation, Chungju, 27469, Republic of Korea

    Tamal Tahsin Khan & Soon-Chul Ur

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  1. Tamal Tahsin Khan
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Correspondence to Soon-Chul Ur.

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Khan, T.T., Ur, SC. Thermoelectric Properties of the Perovskite-Type Oxide SrTi1−xNbxO3 Synthesized by Solid-State Reaction Method. Electron. Mater. Lett. 14, 336–341 (2018). https://doi.org/10.1007/s13391-018-0029-y

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  • DOI: https://doi.org/10.1007/s13391-018-0029-y

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