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添加La的Bi2Te3和Bi0.5Sb1.5Te3热电材料的电磁感应熔炼法制备及其热电性能

傅继澎,杨秀云,张姗姗,高莹,高秀霞,李云辉*   

  1. (长春理工大学化学与环境工程学院 长春 130022)
  • 收稿日期:2011-10-24 修回日期:2011-12-30 出版日期:2012-09-10 发布日期:2012-09-10
  • 通讯作者: 李云辉，教授; Tel:0431-85582361; Fax:0431-86804621; E-mail:liyh@cust.edu.cn; 研究方向：光电功能材料
  • 基金资助:
    吉林省教育厅基金（200743）资助项目

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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摘要： 在N2气保护下，采用电磁感应法制备了添加La的Bi2Te3和Bi0.5Sb1.5Te3。 运用X射线粉末衍射、电感耦合等离子光谱和扫描电子显微镜对材料的物相成分和形貌进行了表征。 研究了La对Bi2Te3和Bi0.5Sb1.5Te3热电材料的电导率(σ)、Seebeck系数(S)和热导率(κ)的影响。 实验结果表明，添加La明显降低了2种材料的热导率，提高了热电优值(ZT)，添加La的Bi0.5Sb1.5Te3的热电优值在室温超过了1。

关键词: 热电材料, 稀土La, 电磁感应

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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