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Journal of Electronic Materials

, Volume 38, Issue 9, pp 1956–1961 | Cite as

p-Type PbTe Thermoelectric Bulk Materials with Nanograins Fabricated by Attrition Milling and Spark Plasma Sintering

  • Chia-Hung Kuo
  • Ming-Shan Jeng
  • Jie-Ren Ku
  • Shih-Kuo Wu
  • Ya-Wen Chou
  • Chii-Shyang HwangEmail author
Article

This work reports a manufacturing process that combines attrition milling and spark plasma sintering (SPS) in the preparation of PbTe bulk materials with nanosize grains. The process involves milling raw PbTe ingots into nanocrystalline powders and subsequent compacting of these powders into dense bulk materials by spark plasma sintering. Sintered samples with relative densities of over 95% and grain sizes as small as 80 nm to 1 μm were obtained through this process. The thermoelectric properties of the samples were measured and compared with those of raw ingots at temperatures from 300 K to 400 K to demonstrate the influence of grain size on thermoelectric properties. The results reveal that reducing the grain size improved thermoelectric performance.

Keywords

PbTe nanograins attrition milling spark plasma sintering Seebeck coefficient thermal conductivity 

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Copyright information

© TMS 2009

Authors and Affiliations

  • Chia-Hung Kuo
    • 1
  • Ming-Shan Jeng
    • 2
  • Jie-Ren Ku
    • 2
  • Shih-Kuo Wu
    • 2
  • Ya-Wen Chou
    • 2
  • Chii-Shyang Hwang
    • 1
    Email author
  1. 1.Department of Materials Science and EngineeringNational Cheng Kung UniversityTainanTaiwan
  2. 2.Energy & Environment LaboratoriesIndustrial Technology Research InstituteLiujia ShiangTaiwan

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