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 Hwang

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1956-1961
Number of pages6
JournalJournal of Electronic Materials
Volume38
Issue number9
DOIs
Publication statusPublished - 2009 Sep

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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