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SrTiO3 glass–ceramics as oxide thermoelectrics

  • Energy Materials & Thermoelectrics
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Abstract

Glass-ceramics obtained via a true bulk glassy phase offer a possibility to obtain high-temperature stable nanostructured materials in a cost efficient way which is suitable for mass production. We apply the method of glass-ceramic manufacturing to a crystalline phase which is known for its good thermoelectric properties as an n-doped material. Nb-doped SrTiO3 with grain sizes of several nanometers is obtained as the main crystalline phase from transparent bulk glass after applying a well-defined time–temperature profile for ceramization. The glass-ceramics show a low thermal conductivity of around 1.6 W/mK and a Seebeck coefficient around −480 μV/K together with electronic conductivity. Thermal cycling of these glass-ceramics without degradation of the thermoelectric properties for temperatures up to 650 °C (923 K) is shown as well.

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Acknowledgements

The author would like to thank Dr. Sasha Populoh and Prof. Anke Weidenkaff of the EMPA institute for their help and guidance during the thermoelectric measurements.

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Authors and Affiliations

  1. Institut für Physik, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany

    Julian Lingner & Gerhard Jakob

  2. SCHOTT AG, Material Development, 55122, Mainz, Germany

    Julian Lingner & Martin Letz

Authors
  1. Julian Lingner
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  2. Martin Letz
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  3. Gerhard Jakob
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Correspondence to Julian Lingner.

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Lingner, J., Letz, M. & Jakob, G. SrTiO3 glass–ceramics as oxide thermoelectrics. J Mater Sci 48, 2812–2816 (2013). https://doi.org/10.1007/s10853-012-6847-7

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  • DOI: https://doi.org/10.1007/s10853-012-6847-7

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