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高性能磁気ヘッド用ガラスの開発

Research Project

Project/Area Number 03555165
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 無機工業化学・無機材料工学
Research InstitutionNagoaka University of Technology

Principal Investigator

MATSUSITA Kazumasa  Nagaoka University of Technology Department of Chemistry, Professor., 工学部, 教授 (80024610)

Co-Investigator(Kenkyū-buntansha) NITTA Atsumi  Nagaoka Plant, ALPS Electric Co., LTd, 長岡工場
SATO Ryuji  Nagaoka University of Technology Department of Chemistry, Research Associate, 工学部, 助手 (60226024)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 1992: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1991: ¥11,700,000 (Direct Cost: ¥11,700,000)
KeywordsMagunetic head / Adhesion glass / Sendust / Ferrite / Lead silicate glass / Interface reaction / Standard free energy / ガラス / 磁性体 / PbO-SiO_2ガラス / 酸化還元反応 / Fe-Si-Ga磁性合金 / アモルファス合金 / 標準生成自由エネルギ-
Research Abstract

Electric and magnetic devices have been becoming smaller and smaller in recent year. Most of these devices are composed of many materials. Oxode glasses are extensively used to form the gap of magnetic heads. It has been well known that the properties of composite magnetic devices are strongly influenced by the interface condition. Therefore, it is important to reveal the mechanism of the interface reactions thoroughly for developing those devices. The purpose of this study is to reveal the mechanisms of interface reaction between magnetic materials and oxide glasses.
The interface reactions between Fe-Al-Si alloy (so-called SENDUST) and SiO_2-PbO binary systems were analyzed using X-ray diffraction, electron probe microanalysis and vibrating sample magnetometer methods. It is found that aluminum atoms in the alloy diffuse to the interface and dissolve into the glass melt as Al^<3+> ions, and at the same time, Pb^<2+>, Na^+ or H^+ ions in the melt are reduced. We concluded that the following redox reactions occurred at the interface between the alloy and oxide glasses when heated at high temperature.
3Pb^<2+>_<glass> + 2Al_<alloy> -> 3Pb + 2Al^<3+>_<glass>
3Na^+ + Al_<alloy> -> 3Na + Al^<3+>_<glass>
6H^+ + 2Al_<alloy> -> 3H_2 + 2Al^<3+>_<glass>
The same redox reactions occur at the interface in Fe-Ga-Si alloy.
Because the ionic radius of Ga^<3+> is the same as that of Al^<3+>.
It is well known that the viscosity of glasses containing Al_2O_3 becomes high with increasing the concentration of Al_2O_3 in the glass.
The viscosity of glass in the vicinity of interface becomes high because of diffusion of aluminum atom in the alloy and the chemical potential of aluminum atoms in the glass increases. As a result, the interface reactions are inhibited.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Kazumasa Matusita,Masako Satou,Takayuki Komatsu,Atsumi Nitta: "Interface reaction between oxide glasses and Fe-Si-Al magnetic alloy" Science and Technology of New Glasses.163-168 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 新田敦己 松下和正: "フェライトとガラスの界面反応" NEW GLASS. 6. 251-257 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Atsumi Nitta Hideyuki Nakamura,Kazumasa Matusita,Takayuki Komatsu,: "Interface reaction between SiO2-PbO MO temary system and manganese zinc ferrites." Journal of Applied Physics. 71. 1992-1997 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kazumasa Matusita,Masako Satou,Takayuki Komatsu,Atsumi Nitta: "Interface reaction between oxide glasses and Fe-Si-Al magnetic alloy" Journal of Materials Science. 28. 6333-6339 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Atsumi Nitta,Toshihiko Ono,Kazumasa Matusita,Takayuki Komatsu: "Interface reactions between glass melts containing transition metal oxide and ferrites" Journal of Materials Science. in press.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kazumasa Matusita, Masako Satou, Takayuki Komatsu, Atsumi Nitta: ""Interface reaction between oxide glasses and Fe-Si-Al magnetic alloy"." Science and Technology of New Glasse. 163-168 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Atsumi Nitta, Kazumasa Matsusita: ""The interface reaction between ferrite and glasses"." NEW GLASS. Vol.6. 251-257 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Atsumi Nitta, Hideyuki Nakamura, Kazumasa Matsusita, Takayuki Komatsu: ""Interface reaction between SiO2-PbO-MO ternary system and manganese zinc ferrites"." Journal of Applied Physics. Vol.71. 1992-1997 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kazumasa Matusita, Masako Satou, Takayuki Komatsu, Atsumi Nitta: ""Interface reaction between oxide glasses and Fe-Si-Al magnetic alloy"." Journal of Materials Science. Vol.28. 6333-6339 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Atsumi Nitta, Toshihiko Ono, Kazumasa Matusita, Takayuki Komatsu: ""Interface reactions between glass melts containing transition metal oxide and ferrites"" Journal of Materials Science. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kazumasa Matusita,Masako Satou,Takayuki Komatsu,Atsumi,Nitta.: "Interface reaction between oxide glasses and Fe-Al-Si magnetic alloy." Scitnce and Technology of New Glasses.163-168 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] Atumi Nitta,Hideyuki Nakamura,Takayuki Komatsu,Kazumasa Matusita.: "Interface reactions between SiO_2-PbO-MnO systems and manganese zinc ferrite." Journal of Appkied Physics.71. 1992-1999 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Atumi Nitta,Masako Satou,Takayuki Komatsu,Kazumasa Matusita.: "Interface reactions of Fe-Al-Ga magnetic alloys with oxide glasses." International Congress on Glass.Vo13¨Glass Structure¨.3. 499-504 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 松下 和正,新田 敦己,佐藤 正子,小松 高行: "Interface Reaction Between Glasses and Fe-Al-Si Magnetic Alloy" Science and Technology of New Glasses. 163-168 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 新田 敦己,松下 和正: "フェライトとガラスの界面反応" NEW GLASS. 6. 251-257 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 新田 敦己,中村 秀行,松下 和正,小松 高行: "Interface reaction between SiO_2-PbO-MO ternary system and manganese zinc ferrites." Journal of Applud Physics. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 松下 和正,佐藤 正子,新田 敦己,小松 高行: "Interface reaction between oxide glasses and Fe-Al-Si magnetic alloy" Joarnal of Applied Physics.

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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