Effect of nano‐SiC dispersion on thermoelectric properties of Bi 2 Te 3  polycrystals | Zendy

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Effect of nano‐SiC dispersion on thermoelectric properties of Bi 2 Te 3 polycrystals

Author(s) -

Li JingFeng,

Liu Jing

Publication year - 2006

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.532

H-Index - 104

eISSN - 1862-6319

pISSN - 1862-6300

DOI - 10.1002/pssa.200622011

Subject(s) - spark plasma sintering , materials science , thermoelectric effect , dispersion (optics) , seebeck coefficient , thermal conductivity , figure of merit , electrical resistivity and conductivity , nano , thermoelectric materials , analytical chemistry (journal) , sintering , composite material , optoelectronics , thermodynamics , optics , chemistry , electrical engineering , physics , chromatography , engineering

Nano‐SiC dispersed Bi 2 Te 3 was synthesized by mechanical alloying (MA) followed by spark plasma sintering (SPS). The effects of SiC dispersion on the thermoelectric properties of the SPS‐sintered Bi 2 Te 3 alloys were investigated. The results revealed that SiC dispersion in the Bi 2 Te 3 matrix increased the absolute value of Seebeck coefficient. Although the electrical resistance was increased somewhat, Bi 2 Te 3 with 0.1 wt% SiC showed a higher power factor than Bi 2 Te 3 without SiC. Because the dispersion of SiC nano‐particles reduced the thermal conductivity at the same time, 0.1 wt% (∼0.24 vol% SiC) addition of SiC nano‐particles increased the figure of merit of Bi 2 Te 3 by 18%. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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