Quick Fabrication and Thermoelectric Properties of Cu12Sb4S13 Tetrahedrite

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• 作者：Juyi Wang ; Ming Gu ; Yefeng Bao ; Xiaoya Li ; Lidong Chen
• 关键词：Cu12Sb4S13 tetrahedrite ; melting ; annealing ; microstructure ; thermoelectric properties
• 刊名：Journal of Electronic Materials
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：45
• 期：4
• 页码：2274-2277
• 全文大小：1,062 KB
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• 作者单位：Juyi Wang (1) (2)
  Ming Gu (2)
  Yefeng Bao (1)
  Xiaoya Li (2)
  Lidong Chen (2)
  
  1. School of Mechanical and Electrical Engineering, Hohai University, Changzhou, 213022, Jiangsu, China
  2. CAS Key Laboratory for Energy Conversion Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  Electronics, Microelectronics and Instrumentation
  Solid State Physics and Spectroscopy
  
• 出版者：Springer Boston
• ISSN：1543-186X

文摘

Tetrahedrites, comprised mainly of earth-abundant and environment-friendly elements, copper and sulfur, may pave the way to many new and low-cost thermoelectric energy generation opportunities. However, the preparation of tetrahedrites is time- and energy-consuming. In this paper, we study the melting process and the effect of the annealing time on the microstructure and thermoelectric properties of the Cu₁₂Sb₄S₁₃ tetrahedrite, in an effort to shorten the synthesis (melting and annealing) time. Our results show that the Cu₁₂Sb₄S₁₃ tetrahedrite phase forms in the melt during cooling. Shortening the melting time does not affect the formation of Cu₁₂Sb₄S₁₃. The cooled ingot consists of the principal phase of Cu₁₂Sb₄S₁₃ and two secondary phases, Cu₃SbS₄ and CuSbS₂. It is found that prolonged annealing cannot eliminate the impurity phases in Cu₁₂Sb₄S₁₃ tetrahedrite, has a small effect on the electrical resistivity, and a negligible effect on the Seebeck coefficient and the thermal conductivity of the tetrahedrite. All our samples have a ZT above 0.47 at 600 K and the maximum ZT obtained was 0.52 when the sample was annealed for 1 day. Based on our experimental results, the time for preparing the Cu₁₂Sb₄S₁₃ tetrahedrite can be considerably shortened.