化学的共沈法によるBa-Pr-Co系M型フェライト微粒子の磁気特性 Magnetic Properties of Ba-Pr-Co M-type Ferrite Fine Particles Prepared by Controlling the Chemical Coprecipitation Method and Heat Treatment

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Single phase Ba-Pr-Co M-type ferrite fine particles were prepared by controlling the chemical coprecipitation method and subsequent heat treatment. The chemical reagents used for this experiment were BaCl<SUB>2</SUB>·2H<SUB>2</SUB>O, FeCl<SUB>3</SUB>·6H<SUB>2</SUB>O, PrCl<SUB>3</SUB>·7H<SUB>2</SUB>O and CoCl<SUB>2</SUB>·6H<SUB>2</SUB>O. The chemical coprecipitation compositions were chosen according to the formula {(BaO)·n/2(Fe<SUB>2</SUB>O<SUB>3</SUB>)}<SUB>100−x−y</SUB>(Pr<SUB>2</SUB>O<SUB>3</SUB>)<SUB>x</SUB>(CoO)<SUB>y</SUB>, where n was fixed at 10.5, x was varied between 1.0 and 12.0, y between 2.0 and 10.0. A water solution containing Ba<SUP>2+</SUP>, Fe<SUP>3+</SUP>, Pr<SUP>3+</SUP> and Co<SUP>2+</SUP> was poured into a solution of NaOH (pH=13.0). The precipitated products were boiled at 100°C for 2h, and they were carefully washed with pure water for 24h. The washing was repeated 5 times and the products were then filtered and dried at 80°C for 12h. The obtained fine particles were heated at a temperature between 950 and 1100°C for 2h in air to get single phase Ba-Pr-Co M-type ferrite fine particles. The most prominent magnetic properties have been observed for the sample with the preparation composition of {(BaO)·5.25(Fe<SUB>2</SUB>O<SUB>3</SUB>)}<SUB>92.0</SUB>(Pr<SUB>2</SUB>O<SUB>3</SUB>)<SUB>4.0</SUB>(CoO)<SUB>4.0</SUB> ; they are as follows: σ<SUB>s</SUB>=83.1×10<SUP>−6</SUP> Wb·m/kg (66.1 emu/g), σ<SUB>r</SUB>=41.0×10<SUP>−6</SUP> Wb·m/kg (32.6 emu/g), H<SUB>cJ</SUB>=467.8 kA/m (5.88 kOe), α(σ<SUB>r</SUB>)=−0.19 %/°C, α(H<SUB>cJ</SUB>)=0.07 %/°C and T<SUB>c</SUB>=450°C.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 53(7), 610-616, 2006-07-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10018005704
  • 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
    8046100
  • 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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