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Preparation and Thermoelectric Properties of La-Doped SrTiO3 Ceramics

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Abstract

Single-phase polycrystalline La x Sr1−x TiO3 (x = 0, 0.04, 0.06, 0.08, and 0.12) ceramics were prepared by the conventional solid-state reaction method using high-activity hydroxides as the raw materials. The electrical conductivity of all the samples increased with increasing x value and decreased with measurement temperature, while the thermal conductivity decreased with increasing x value and measurement temperature. The La0.12Sr0.88TiO3 sample showed the lowest thermal conductivity of 2.45 W m−1 K−1 at 873 K and the largest ZT of 0.28 at 773 K. The present work revealed that hydroxides with high activity as raw materials are beneficial to improve the thermoelectric properties, especially to decrease the thermal conductivity.

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Authors and Affiliations

  1. Beijing Key Lab of New Energy Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Peng-Peng Shang & Bo-Ping Zhang

  2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Yong Liu & Hong-Min Zhu

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

    Jing-Feng Li

Authors
  1. Peng-Peng Shang
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  2. Bo-Ping Zhang
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  3. Yong Liu
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  4. Jing-Feng Li
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  5. Hong-Min Zhu
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Correspondence to Bo-Ping Zhang.

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Shang, PP., Zhang, BP., Liu, Y. et al. Preparation and Thermoelectric Properties of La-Doped SrTiO3 Ceramics. J. Electron. Mater. 40, 926–931 (2011). https://doi.org/10.1007/s11664-010-1452-5

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  • DOI: https://doi.org/10.1007/s11664-010-1452-5

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