六方晶U型フェライトBa_4Me_2Fe_<36>O_<60>(Me=Co, Ni, Mg)の作製プロセスの確立および磁気特性 Establishment of Preparation Process of Hexagonal U-type Ferrites Ba_4Me_2Fe_<36>O_<60>(Me=Co, Ni, Mg) and Their Magnetic Properties

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We have established the preparation process of hexagonal U-type ferrites Ba<SUB>4</SUB>Me<SUB>2</SUB>Fe<SUB>36</SUB>O<SUB>60</SUB> (Me=Co, Ni, Mg) and investigated their crystal structure and magnetic properties. The U-type ferrite single phase was not fabricated by using a conventional ceramic synthesis process which comprises two-steps: calcination and sintering. We have found that the U-type ferrites single phase can be obtained by a one-step sintering method that skips the calcination process. The single phase of the U-type ferrite was formed at a very narrow temperature at about 1250°C. The values of saturation magnetization and the Curie temperature of Co<SUB>2</SUB>U ferrite were higher than those of Co<SUB>2</SUB>Z ferrite. Initial permeability of Co<SUB>2</SUB>U ferrite has a higher value than those of Ni<SUB>2</SUB>U and Mg<SUB>2</SUB>U ferrites. The U-type ferrite has a great potential for high frequency magnetic materials.

We have established the preparation process of hexagonal U-type ferrites Ba<SUB>4</SUB>Me<SUB>2</SUB>Fe<SUB>36</SUB>O<SUB>60</SUB> (Me=Co, Ni, Mg) and investigated their crystal structure and magnetic properties. The U-type ferrite single phase was not fabricated by using a conventional ceramic synthesis process which comprises two-steps: calcination and sintering. We have found that the U-type ferrites single phase can be obtained by a one-step sintering method that skips the calcination process. The single phase of the U-type ferrite was formed at a very narrow temperature at about 1250°C. The values of saturation magnetization and the Curie temperature of Co<SUB>2</SUB>U ferrite were higher than those of Co<SUB>2</SUB>Z ferrite. Initial permeability of Co<SUB>2</SUB>U ferrite has a higher value than those of Ni<SUB>2</SUB>U and Mg<SUB>2</SUB>U ferrites. The U-type ferrite has a great potential for high frequency magnetic materials.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 59(3), 131-136, 2012-03-15

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10030479948
  • 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
    023617980
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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