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1997 Fiscal Year Final Research Report Summary

Fabrication of Amorphous Powder Perticles by Spinning Water Atomization Process (SWAP), and Development of Compressed Powder Magnetic Cores

Research Project

Project/Area Number 08555080
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Electronic materials/Electric materials
Research InstitutionKumamoto Institute of Technology

Principal Investigator

YAGI Masaaki  Kumamoto Institute of Technology, Faculty of Engng., Prof., 工学部, 教授 (80005371)

Co-Investigator(Kenkyū-buntansha) ENDO Isao  Kubota CO., Tech.Development Lab., Engng.Material Dept., Manager, 技術開発研究所, 部長
MUNAKATA Makoto  Kumamoto Institute of Technology, Faculty of Engng., Associate Prof., 工学部, 助教授 (10183112)
Project Period (FY) 1996 – 1997
Keywordsamorphous / Fe-based alloys / powder particles / commpressed powder core / soft magnetic properties / high-frequency core
Research Abstract

Fe-based amorphous powder particles were fabricated by the spinning water atomization process (SWAP), recently developed by the authors. The powders obtained exhibited good soft-magnetic properties up to particle sizes of about 200-300mum. These amorphous particles were insulated by glass fine powder and pressed into toroidal and E shape cores by hot-pressing techniques at relatively high temperature conditions below crystallization temperature. The mass densities of the pressed cores were about 80-85%. The magnetic properties of toroidal samples 20-30 mm in diameter were measured after annealing. For the core pressed at 1.5GPa, 450-480゚C,the initial permeability was about 100 in the frequency range up to 1 MHz for H_m=5mOe, which were comparable to those of commercial Sendust compressed cores and Fe-based gapped amorphous ribbon cores for application to fly-back transformers or choking coils operating at frequencies above 100kHz. The core losses at 100kHz were 6-7 [J/m^3] (=0.6-0.7 [W/cc] ) for B_m=0.1T.These values were 50-70% of those of above commercial cores.

  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 八木 正昭: "高周波用アモルファス粉末成形磁心の開発" 熊本工業大学E.E.研究所報告. Vol.2. 15-24 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 八木, 深見, 遠藤: "高周波用アモルファス粉末粉末成形磁心の磁気特性" 電気学会 マグネティックス研究会. MAG-97-12. 65-70 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 八木, 遠藤: "高周波電力用Fe基アモルファス粉末成形磁心の開発" 電子通信情報学会1997総合大会論文集. SB-9. 2 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小沢, 長尾, 八木, 原田, 遠藤: "アモルファス粉末成形磁心を用いた昇降圧形コンバータの特性(2)-フェライトコアとの比較-" 電子通信情報学会1997総合大会論文集. SB-9. 1 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大塚, 遠藤, 越本, 山本, 奥野, 吉野, 深見, 八木: "SWAP法によるFe基アモルファス磁性粉末の作製とその成形磁心の磁気特性" 日本応用磁気学会誌. 21・4. 617-620 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 森崎, 八木, 遠藤: "ギャップ付きポット形アモルファス粉末成形磁心の磁気特性" 平成9年度電気関係学会九州支部連合大会論文集. (1997)

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      「研究成果報告書概要(和文)」より
  • [Publications] 横内, 奥山, 芳賀, 大塚, 八木, 松木: "アモルファス磁性粉を用いたコンクリートクラックの深さ推定の基礎的検討" 日本応用磁気学会誌. 22・4(掲載予定). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yagi: "Development of compressed amorphous. powder cores" Kumamoto Inst.of Tech, E.E.Reports. Vol.2, No.1. 15-24 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] I.Otsuka, I.Endo, H.Koshimoto, H.Yamamoto, R.Okuno, M.Yoshino, H.Hukami, M.Yagi: "Fabrication of Fe-Based Amorphous Powders by the Spinning Water Aomization Process, and the Mageic Properties of Their Compressed Cores" Journal.of the Magnetics Society of Japan. Vol.21, No.4-2. 617-620 (1997)

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      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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