Synthesis of Mg2Si1-xSnx solid solutions as thermoelectric materials by bulk mechanical alloying and hot pressing

R. B. Song, T. Aizawa, J. Q. Sun

研究成果: Article査読

81 被引用数 (Scopus)

抄録

Bulk mechanical alloying with combination of hot pressing is proposed to prepare Mg2Si1-xSnx (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) solid solutions as thermoelectric materials from elemental granules. Hot pressing condition is optimized in order to obtain higher figure of merit. Temperature dependence of the electrical conductivity, the Seebeck coefficient and thermal conductivity were measured from the room temperature up to 700 K. It was found that the thermoelectric properties of Mg2Si1-xSnx were sensitive to the tin concentration. The p-n conversion takes place at the vicinity of x = 0.2, where the Seebeck coefficient drastically changes its sign. A maximum figure of merit of 0.13 was obtained at 653 K in the samples with nominal compositions of Mg2Si0.4Sn0.6 and Mg2Si.

本文言語English
ページ(範囲)111-117
ページ数7
ジャーナルMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
136
2-3
DOI
出版ステータスPublished - 2007 1 25

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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