SPS烧结工艺对填充方钴矿热电性能的影响

Translated title of the contribution: Effect of Spark Plasma Sintering on Sintering Process of Filled Skutterudites Thermoelectric Properties

Zhenxing Zhou, Xiaofang Lu, Lianjun Wang, Shijia Gu

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, filled skutterudites Yb0.3Co4Sb12 were synthesized by meltting quenching and annealing method. Then high-energy ball milling was employed to prepare micro/nano-structured powders. After that bulk materials were sintered by the technology of spark plasma sintering (SPS). The phase structure and morphology of the powder and the bulk materials were studied by XRD, SEM and TEM. The grain size after high-energy ball milling was 50~500 nm and the distribution is wide. The thermoelectric properties of the samples with different sintering processes like sintering temperature and sintering pressure were investigated in detail. The results show that with the increase of sintering temperature, the thermoelectric properties first increase and then decrease, which is caused by the increase of the sample density first and then the grain growth. And the densities and thermoelectric properties can be improved slightly by increasing sintering pressure. After sintered at about 875 K with 90 MPa, the thermoelectric properties of the material are the best, and the thermoelectric figure of merit (ZT value) reached 1.19 at 750 K.

Translated title of the contributionEffect of Spark Plasma Sintering on Sintering Process of Filled Skutterudites Thermoelectric Properties
Original languageChinese (Traditional)
Pages (from-to)588-593
Number of pages6
JournalMaterials China
Volume38
Issue number6
DOIs
Publication statusPublished - 2019 Jun 1
Externally publishedYes

Keywords

  • Filled skutterudites
  • High-energy ball milling
  • Micro/nano structure
  • Sintering process
  • Spark plasma sintering
  • Thermoelectric material

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Safety, Risk, Reliability and Quality

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