α鉄のアンモニア窒化による窒化鉄Fe_xN(x : 2, 2-3, 4, 16/2)の合成とFe_<16>N_2バルク試料の磁性 Synthesis of Iron Nitrides Fe_xN(x : 2, 2-3, 4, 16/2)by Nitrogenizing α-Fe in Ammonia Gas, and Magnetic Properties of The Bulk Sample of Fe_<16>N_2

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Iron nitrides were prepared by nitrogenizing α-iron in ammonia gas at temperatures from 100°C to 700°C. In the case using iron foils as a starting material, Fe<SUB>2-3</SUB>N and Fe<SUB>4</SUB>N were formed as a main crystal phase at the temperature ranges of 450-700°C and 250-400°C, respectively. A crystal phase like to Fe<SUB>16</SUB>N<SUB>2</SUB> was formed at 210°C, but its XRD and Mössbauer data were too insufficient to identify as Fe<SUB>16</SUB>N<SUB>2</SUB>. While bulk Fe<SUB>16</SUB>N<SUB>2</SUB> was formed by nitrogenizing iron fine powder with the diameter of about 20nm at 110°C for 10days, but small amounts of Fe<SUB>3</SUB>N coexisted as a second phase with Fe<SUB>16</SUB>N<SUB>2</SUB> at 120°C for 10days. Crystal structure of Fe<SUB>16</SUB>N<SUB>2</SUB> was refined by Rietveld method. The average magnetic moment of three kinds of Fe atoms in Fe<SUB>16</SUB>N<SUB>2</SUB> was evaluated to be 2.52μB on the basis of its Mossbauer data, the value of which was larger by 15% than the magnetic moment of α-Fe. The saturation magnetization of the Fe<SUB>16</SUB>N<SUB>2</SUB> powder was also larger by about 14% than that of the α-Fe powder before nitrogenizing.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 46(2), 151-155, 1999-02-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002261825
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4655530
  • 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  CJP引用  NDL  J-STAGE 
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