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Thermoelectric properties of Bi3+ substituted Co-based misfit-layered oxides

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Abstract

Highly densified (Ca1−x Bi x )3Co4O9 thermoelectric ceramics with a layered structure were prepared by a sol–gel method followed by spark plasma sintering (SPS). Thermoelectric (TE) properties of the complex oxide ceramics were measured from room temperature to 700 °C. The results show that Bi3+ substitution leads to an increase in both electrical conductivity and Seebeck coefficient simultaneously. Bi3+ doped samples also show a lower thermal conductivity than undoped samples. The dimensional figure of merit ZT value of (Ca0.95 Bi0.05)3Co4O9 samples is 0.25 at 700 °C.

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Acknowledgements

This work was supported by the National Science Foundation of China under grant no. 50328203 and the National High Technology Research and Development Program of China under grant no. 2002AA302406.

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Authors and Affiliations

  1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Yuheng Liu, Yuanhua Lin, Lei Jiang & Ce-Wen Nan

  2. Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, S10691, Stockholm, Sweden

    Zhijian Shen

Authors
  1. Yuheng Liu
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  2. Yuanhua Lin
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  3. Lei Jiang
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  4. Ce-Wen Nan
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  5. Zhijian Shen
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Correspondence to Ce-Wen Nan.

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Liu, Y., Lin, Y., Jiang, L. et al. Thermoelectric properties of Bi3+ substituted Co-based misfit-layered oxides. J Electroceram 21, 748–751 (2008). https://doi.org/10.1007/s10832-007-9297-x

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  • DOI: https://doi.org/10.1007/s10832-007-9297-x

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