Chinese Journal of Applied Chemistry

Chinese Journal of Applied Chemistry

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Synthesis of La-Doped Bi2Te3 and Bi0.5Sb1.5Te3 via the Electromagnetic Induction Method and Their Thermoelectric Properties

FU Jipeng, YANG Xiuyun, ZHANG Shanshan, GAO Ying, GAO Xiuxia, LI Yunhui*   

  1. (School of Chemistry and Environmental Engineering,Changchun University of
    Science and Technology,Changchun 130022,China)
  • Received:2011-10-24 Revised:2011-12-30 Published:2012-09-10 Online:2012-09-10
  • Contact: yunhui

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Abstract: Under the protection of pure N2, La-doped Bi2Te3 and Bi0.5Sb1.5Te3 were prepared by the method of electromagnetic induction. The structures and morphologies of the samples were characterized using X-ray diffraction, inductively coupled plasma and scanning electron microscopy. The electricity conductivity(σ), Seebeck coefficient(S) and thermal conductivity(κ) were studied. The results showed that La-doped samples have lower thermal conductivity and enhanced figure of merit(ZT). The thermoelectric figure of merit of La-doped Bi0.5Sb1.5Te3 were improved up to 1 at room temperature.

Key words: thermoelectric materials, rare earth La, electromagnetic induction

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