SrFe_2-W型フェライトの形成条件と磁気特性に及ぼすSi固体還元剤の影響 Effect of Solid Reducing Agent of Si on Formative Condition of SrFe_2-W Type Ferrite and Magnetic Properties

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The W-type hexagonal ferrite, with the chemical formula of Sr(Ba)Fe<SUP>2</SUP>+Fe<SUP>3</SUP>+<SUB>16</SUB>O<SUB>27</SUB>, is the future candidate ferrite because of its 10% higher saturation magnetization in comparing with that of M-type ferrites. A complicated atmosphere control during sintering process is, however, required in manufacturing of W-type ferrites, which will be unsuitable for industrial production. Recently, it is reported that a high performance SrFe<SUB>2</SUB>-W type ferrite can be produced with using a carbon powder as a solid reducing agent and controlling the drying temperature of green compacts. The energy product (BH)max of this SrFe2-W type ferrite is reported to be 5.3MGOe. The purpose of this study is to clarify the effects of drying treatment of green compacts, and addition of Si as a new solid reducing agent on the formative condition of SrFe<SUB>2</SUB>-W type ferrite.<BR>The drying treatment at 373K and following by firing at 1473K for 10 hours in Po<SUB>2</SUB>=250 Pa are the suitable formative conditions for silicon addition to achieve high volume fraction of SrFe<SUB>2</SUB>-W phase and this sample has the(BH)max of 10.3kJ.m<SUP>-3</SUP>.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(7), 641-645, 1998-07-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002052406
  • 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
    4535708
  • 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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