化学的共沈法による(Sr・Ba)-La-Co系M型フェライト微粒子の磁気特性  [in Japanese] Magnetic Properties of the M-Type Ferrite Fine Particles of the(Sr・ Ba)-La-Co System Prepared by Controlling the Chemical Coprecipitation Method  [in Japanese]

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Abstract

(Sr⋅Ba)-La-Co M-type ferrite fine particles were prepared by the chemical coprecipitation and subsequent heat-treatment method. The chemical reagents used for the experiment were FeCl<SUB>3</SUB>⋅6H<SUB>2</SUB>O, BaCl<SUB>2</SUB>⋅6H<SUB>2</SUB>O, SrCl<SUB>2</SUB>.6H<SUB>2</SUB>O, LaCl<SUB>3</SUB>⋅7H<SUB>2</SUB>O, and CoCl<SUB>2</SUB>.6H<SUB>2</SUB>O. The chemical coprecipitation process was applied to the samples having the formula. {(SrO)<SUB>1</SUB>-x⋅(BaO)x⋅n/2(Fe<SUB>2</SUB>O<SUB>3</SUB>)}<SUB>100-Y-Z</SUB>(La<SUB>2</SUB>O<SUB>3</SUB>)<SUB>Y</SUB>(CoO)<SUB>Z</SUB> (n=6.0-12.0, x=0.0-1.0, y=1.0-10.0, z=1.0-10.0). The solution containing Sr<SUP>2+</SUP>, Ba<SUP>2+</SUP>, Fe<SUP>3+</SUP>, La<SUP>3+</SUP>, and Cot<SUP>2+</SUP> was poured into solution of NaOH (pH=13.0). The precipitated products were boiled for 2h and they were carefully washed with water and dried. The obtained fine particles were heated at 950 to 1100°C for 2h in air to obtain the single phase of (Sr⋅Ba)-La-Co M-type ferrite fine particles. The best magnetic properties were observed for the sample with the composition of {(SrO)<SUB>0.8</SUB>⋅(BaO)<SUB>0.2</SUB>⋅3.5(Fe<SUB>2</SUB>O<SUB>3</SUB>)} <SUB>88.0</SUB> (La<SUB>2</SUB>O<SUB>3</SUB>)<SUB>6.0</SUB>(CoO)<SUB>6.0</SUB>, and magnetic properties were as follows: σ<SUB>s</SUB>= 84.8 × 10<SUP>-6</SUP> Wb⋅m/kg (67.5 emu/g), σ<SUB>r</SUB>=42.8 × 10<SUP>-6</SUP> Wb⋅m/kg (34.1 emu/g), H<SUB>cJ</SUB>=476.6 kA/m (5.98 kOe) and Tc=452.6°C.

Journal

  • Journal of the Japan Society of Powder and Powder Metallurgy

    Journal of the Japan Society of Powder and Powder Metallurgy 49(6), 496-502, 2002-06-15

    Japan Society of Powder and Powder Metallurgy

References:  11

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008833487
  • NII NACSIS-CAT ID (NCID)
    AN00222724
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    05328799
  • NDL Article ID
    6190611
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-274
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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