Magnetic Properties of Anisotropic Bonded Magnets Using Sr-La-Co System M-Type Ferrite Powders Prepared by Mechanical Compounding Method

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  • Obara Gaku
    Department of Electrical Engineering and Computer Sciences, Graduate School of Engineering, Himeji Institute of technology
  • Yamamoto Hiroshi
    Department of Electrical and Electronic Engineering, School of Science and Technology Meiji University
  • Senda Masayasu
    Douwa Mining (Nippon Bengara Industrial) Co., LTD.

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  • メカニカルコンパウンディング法により作製したＳｒ‐Ｌａ‐Ｃｏ系Ｍ型フェライト粉末を用いた異方性ボンド磁石の磁気特性
  • メカニカル コンパウンディングホウ ニ ヨリ サクセイ シタ Sr La Co ケイ Mガタ フェライト フンマツ オ モチイタ イホウセイ ボンド ジシャク ノ ジキ トクセイ

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Abstract

Sr-La-Co M-type ferrite powders were prepared by the mechanical compounding method using the planetary ball-mill and subsequent heat treatment. This experiment was carried out to investigate magnetic properties of bonded magnet using M-type ferrite powders prepared by Mechanical compounding method. The properties and making condition of typical sample are as follows; Chemical composition: SrO⋅6.3Fe2O3 in addition with 2.0 wt% La2O3 and 0.3 wt% Co3O4; planetary ball-mill condition: 300 rpm × 1 h; heat treatment condition: 1200°C×4h in air; centrifugal mill time: 1 h; binder: Nylon6 (ejection molding); magnetic properties are Jr= 0.252T; HcJ=307kA/m; (BH)max=12.3 kJ/m3 and density: 3.57 Mg/m3.

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