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Enhanced thermoelectric performance of BiSbTe alloy: Energy filtering effect of nanoprecipitates and the effect of SiC nanoparticles

Journal Article


Abstract


  • p-type Bi0.46Sb1.54Te3 samples containing nanoprecipitates are prepared by mechanical alloying (MA) and spark plasma sintering (SPS) technique. The thermoelectric performance of Bi0.46Sb1.54Te3 is improved by the energy filtering effect induced by nanoprecipitates, leading to a high ZT value of 1.18 at 325 K. To further improve the thermoelectric performance of Bi0.46Sb1.54Te3, SiC nanoparticles are dispersed into Bi0.46Sb1.54Te3 matrix. The addition of SiC simultaneously increases the electrical conductivity and the Seebeck coefficient. Meanwhile, it also decreases the lattice thermal conductivity from 0.38 to 0.33 Wm−1K−1 for the 0.2 wt% SiC sample. Consequently, a maximum ZT value of 1.45 at 325 K is obtained for Bi0.46Sb1.54Te3 with the addition of 0.2 wt% SiC composites, which increases about 23% than the pristine sample.

UOW Authors


  •   Zhang, De (external author)
  •   Lei, Jingdan (external author)
  •   Guan, Weibao (external author)
  •   Ma, Zheng (external author)
  •   Wang, Chao (external author)
  •   Zhang, Lijuan (external author)
  •   Cheng, Zhenxiang
  •   Wang, Yuanxu (external author)

Publication Date


  • 2019

Citation


  • Zhang, D., Lei, J., Guan, W., Ma, Z., Wang, C., Zhang, L., Cheng, Z. & Wang, Y. (2019). Enhanced thermoelectric performance of BiSbTe alloy: Energy filtering effect of nanoprecipitates and the effect of SiC nanoparticles. Journal of Alloys and Compounds, 784 1276-1283.

Scopus Eid


  • 2-s2.0-85060208932

Number Of Pages


  • 7

Start Page


  • 1276

End Page


  • 1283

Volume


  • 784

Place Of Publication


  • Netherlands

Abstract


  • p-type Bi0.46Sb1.54Te3 samples containing nanoprecipitates are prepared by mechanical alloying (MA) and spark plasma sintering (SPS) technique. The thermoelectric performance of Bi0.46Sb1.54Te3 is improved by the energy filtering effect induced by nanoprecipitates, leading to a high ZT value of 1.18 at 325 K. To further improve the thermoelectric performance of Bi0.46Sb1.54Te3, SiC nanoparticles are dispersed into Bi0.46Sb1.54Te3 matrix. The addition of SiC simultaneously increases the electrical conductivity and the Seebeck coefficient. Meanwhile, it also decreases the lattice thermal conductivity from 0.38 to 0.33 Wm−1K−1 for the 0.2 wt% SiC sample. Consequently, a maximum ZT value of 1.45 at 325 K is obtained for Bi0.46Sb1.54Te3 with the addition of 0.2 wt% SiC composites, which increases about 23% than the pristine sample.

UOW Authors


  •   Zhang, De (external author)
  •   Lei, Jingdan (external author)
  •   Guan, Weibao (external author)
  •   Ma, Zheng (external author)
  •   Wang, Chao (external author)
  •   Zhang, Lijuan (external author)
  •   Cheng, Zhenxiang
  •   Wang, Yuanxu (external author)

Publication Date


  • 2019

Citation


  • Zhang, D., Lei, J., Guan, W., Ma, Z., Wang, C., Zhang, L., Cheng, Z. & Wang, Y. (2019). Enhanced thermoelectric performance of BiSbTe alloy: Energy filtering effect of nanoprecipitates and the effect of SiC nanoparticles. Journal of Alloys and Compounds, 784 1276-1283.

Scopus Eid


  • 2-s2.0-85060208932

Number Of Pages


  • 7

Start Page


  • 1276

End Page


  • 1283

Volume


  • 784

Place Of Publication


  • Netherlands