Solid state synthesis and thermoelectric properties of Mg-Si-Ge system

Renbo Song, Yazheng Liu, Tatsuhiko Aizawa

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Thermoelectric materials, Mg2Si1-xGex (x=0, 0.2, 0.4, 0.6, 0.8, 1), have been prepared by bulk mechanical alloying (BMA) and hot pressing (HP). The electrical conductivity, Seebeck coefficient and thermal conductivity were measured from room temperature up to about 700 K. The electrical conductivity of all the samples increases with increasing temperature, while the Seebeck coefficient and thermal conductivity decrease with increasing temperature. Mg2Si and Mg2Si0.8Ge0.2 possess negative type of conductivity, while for other compounds it is positive. At the same time, the effect of hot processing condition on thermoelectric properties was also investigated. The maximum figure of merit of Mg2Si0.6Ge0.4 was obtained with the processing parameter of BMA at 600 cycles and hot pressing at 773 K and 1 GPa for 1 h.

本文言語English
ページ(範囲)618-622
ページ数5
ジャーナルJournal of Materials Science and Technology
21
5
出版ステータスPublished - 2005 9 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料力学
  • 機械工学
  • ポリマーおよびプラスチック
  • 金属および合金
  • 材料化学

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