部分元素置換と微細構造制御を行った FeSi2 焼結体の熱電特性

  • 大瀧 倫卓
    九州大学大学院総合理工学研究科材料開発工学専攻
  • 小椋 大輔
    九州大学大学院総合理工学研究科材料開発工学専攻
  • 江口 浩一
    九州大学大学院総合理工学研究科材料開発工学専攻
  • 荒井 弘通
    九州大学大学院総合理工学研究科材料開発工学専攻

書誌事項

タイトル別名
  • Thermoelectric Properties of Sintered FeSi2 with Fe-site Substitution and Microstructural Modification

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説明

Partial substitution of Cr, Mn, Co, or Ni for Fe in FeSi2 led to stably semiconducting FeSi2, of which p-type appeared with Cr and Mn whereas Co- and Ni-substitution caused n-type. Substitution of other various transition and non-transition metals for Fe significantly varies the microstructure of sintered samples. Consequently, the thermoelectric power increases and the electrical conductivity decreases with decreasing relative density of the samples. On the other hand, H2 reduction of a thin oxide layer on the surface of the sintered samples notably improved the thermoelectric power without changing the electrical conductivity. Microstructural modification by varying the particle size of the powders for the sintering procedure revealed that the sample consists of the most coarse particles attained the maximum value of the thermoelectric figure of merit since the coarse particles decreased the surface area and the thermal conductivity of the sintered body.

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詳細情報 詳細情報について

  • CRID
    1390853649766973184
  • NII論文ID
    120002168846
  • NII書誌ID
    AN00055101
  • DOI
    10.15017/17294
  • HANDLE
    2324/17294
  • 本文言語コード
    ja
  • 資料種別
    departmental bulletin paper
  • データソース種別
    • JaLC
    • IRDB
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用可

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