Thermoelectric properties of Al-Pd-Re quasicrystal sintered by Spark Plasma Sintering (SPS): effect of improvement of microstructure

Yoshiki Takagiwa, Takahiko Kamimura, Sizuka Hosoi, Junpei Tamura Okada, Kaoru Kimura

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report the thermoelectric properties of poly-grain Al-Pd-Re icosahedral quasicrystals and discuss an effect of improvement of their microstructure. The improvement of microstructure by using Spark Plasma Sintering (SPS) method resulted into a large increase of the electrical conductivity but less increase of the thermal conductivity. The relative density dramatically increased up to more than 90% by SPS. On the other hand, the microstructure itself does not have critical influence on the Seebeck coefficient, which is found to be strongly correlated with e/a (sample's compositions). Consequently, the dimensionless figure of merit (ZT) increased three times from 0.05 to 0.15.

Original languageEnglish
Pages (from-to)79-83
Number of pages5
JournalZeitschrift fur Kristallographie
Volume224
Issue number1-2
DOIs
Publication statusPublished - 2009 Apr 13
Externally publishedYes

Keywords

  • Al-Pd-Re
  • Microstructure
  • Quasicrystals
  • Spark Plasma Sintering (SPS)
  • Thermoelectric properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

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