SEMICONDUCTOR MATERIALS

Effect of current on the microstructure and performance of (Bi2Te3)0.2(Sb2Te3)0.8 thermoelectric material via field activated and pressure assisted sintering

Chen Ruixue, Meng Qingsen, Fan Wenhao and Wang Zhong

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Abstract: (Bi2Te3)0.2(Sb2Te3)0.8 thermoelectric material was sintered via a field activated and pressure assisted sintering (FAPAS) process. By applying different current intensity (0, 60, 320 A/cm2) in the sintering process, the effects of electric current on the microstructure and thermoelectric performance were investigated. This demonstrated that the application of electric current in the sintering process could significantly improve the uniformity and density of (Bi2Te3)0.2(Sb2Te3)0.8 samples. When the current intensity was raised to 320 A/cm2, the preferred orientation of grains was observed. Moreover, positive effects on the thermoelectric performance of applying electric current in the sintering process were also confirmed. An increase of 0.02 and 0.11 in the maximum figure of merit ZT value could be acquired by applying current of 60 and 320 A/cm2, respectively.

Key words: thermoelectric material(Bi2Te3)0.2(Sb2Te3)0.8microstructureperformancecurrent

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    Received: 18 August 2015 Revised: 20 February 2011 Online: Published: 01 July 2011

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      Chen Ruixue, Meng Qingsen, Fan Wenhao, Wang Zhong. Effect of current on the microstructure and performance of (Bi2Te3)0.2(Sb2Te3)0.8 thermoelectric material via field activated and pressure assisted sintering[J]. Journal of Semiconductors, 2011, 32(7): 073001. doi: 10.1088/1674-4926/32/7/073001 Chen R X, Meng Q S, Fan W H, Wang Z. Effect of current on the microstructure and performance of (Bi2Te3)0.2(Sb2Te3)0.8 thermoelectric material via field activated and pressure assisted sintering[J]. J. Semicond., 2011, 32(7): 073001. doi: 10.1088/1674-4926/32/7/073001.Export: BibTex EndNote
      Citation:
      Chen Ruixue, Meng Qingsen, Fan Wenhao, Wang Zhong. Effect of current on the microstructure and performance of (Bi2Te3)0.2(Sb2Te3)0.8 thermoelectric material via field activated and pressure assisted sintering[J]. Journal of Semiconductors, 2011, 32(7): 073001. doi: 10.1088/1674-4926/32/7/073001

      Chen R X, Meng Q S, Fan W H, Wang Z. Effect of current on the microstructure and performance of (Bi2Te3)0.2(Sb2Te3)0.8 thermoelectric material via field activated and pressure assisted sintering[J]. J. Semicond., 2011, 32(7): 073001. doi: 10.1088/1674-4926/32/7/073001.
      Export: BibTex EndNote

      Effect of current on the microstructure and performance of (Bi2Te3)0.2(Sb2Te3)0.8 thermoelectric material via field activated and pressure assisted sintering

      doi: 10.1088/1674-4926/32/7/073001
      Funds:

      The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

      • Received Date: 2015-08-18
      • Accepted Date: 2011-01-24
      • Revised Date: 2011-02-20
      • Published Date: 2011-06-22

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