Thermoelectric Properties of FeSi Thermoelectric Element Produced by Utilizing the MA/SPS Process

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P-type and n-type β-FeSi<SUB>2</SUB> was produced by utilizing the process of mechanical alloying(MA)and spark plasma sintering(SPS)technique. Raw powders of pure iron, silicon, manganese and cobalt were mixed and mechanically alloyed for 72ks using planetary ball mill. The mixing fractions of the powders were in accordance with the mole fractions of the Fe<SUB>0.92</SUB>Mn<SUB>0.08</SUB>Si<SUB>2</SUB> (p-type) and Fe<SUB>0.98</SUB>Co<SUB>0.02</SUB>Si<SUB>2</SUB> (n-type), respectively. The SPS temperature for producing p-type β-FeSi<SUB>2</SUB> was 1073-1153 K and n-type β-FeSi<SUB>2</SUB> was 1073-1173 K, and the holding time was 0.3ks. When the sintering temperature was over these temperatures, α-FeSi<SUB>2</SUB> was produced and thermoelectric properties were reduced. The density of p-type β-FeSi<SUB>2</SUB> sintered at 1153 K was 4.64g/cm<SUP>3</SUP>(the relative density was 94.1%), and the maximum power factor was 0.30mW/mK<SUP>2</SUP> at 850 K. The density of n-type β-FeSi<SUB>2</SUB> sintered at 1173K was 4.71 g/cm3(the relative density was 95.5%), and the maximum power factor was 0.058 mW/mK<SUP>2</SUP> at 650K.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 50(11), 931-936, 2003-11-15

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10012549476
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    6787136
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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