EP0394020A3 - Ferrite particles and ferrite resin composite for bonded magnetic core and process for their production - Google Patents

Ferrite particles and ferrite resin composite for bonded magnetic core and process for their production Download PDF

Info

Publication number
EP0394020A3
EP0394020A3 EP19900304167 EP90304167A EP0394020A3 EP 0394020 A3 EP0394020 A3 EP 0394020A3 EP 19900304167 EP19900304167 EP 19900304167 EP 90304167 A EP90304167 A EP 90304167A EP 0394020 A3 EP0394020 A3 EP 0394020A3
Authority
EP
European Patent Office
Prior art keywords
ferrite
magnetic core
production
resin composite
bonded magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19900304167
Other languages
German (de)
French (fr)
Other versions
EP0394020A2 (en
EP0394020B1 (en
Inventor
Shigehisa Yamamoto
Masaru Kawabata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toda Kogyo Corp
Original Assignee
Toda Kogyo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP1101204A external-priority patent/JP2743009B2/en
Priority claimed from JP2050715A external-priority patent/JP2893351B2/en
Application filed by Toda Kogyo Corp filed Critical Toda Kogyo Corp
Publication of EP0394020A2 publication Critical patent/EP0394020A2/en
Publication of EP0394020A3 publication Critical patent/EP0394020A3/en
Application granted granted Critical
Publication of EP0394020B1 publication Critical patent/EP0394020B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • H01F1/37—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)

Abstract

Ferrite particles suitable for a bonded magnetic core which particles comprise crystal grains of from 5 to 15µm in average diameter and have an average particle diameter of from 20 to 150µm and a magnetic permeability of not less than 25; a ferrite resin composition thereof; and a process for producing the same.
EP19900304167 1989-04-19 1990-04-18 Ferrite particles and ferrite resin composite for bonded magnetic core and process for their production Expired - Lifetime EP0394020B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1101204A JP2743009B2 (en) 1989-04-19 1989-04-19 Ferrite particle powder for bond core and method for producing the same
JP101204/89 1989-04-19
JP2050715A JP2893351B2 (en) 1990-02-28 1990-02-28 Ferrite / resin composite composition
JP50715/90 1990-02-28

Publications (3)

Publication Number Publication Date
EP0394020A2 EP0394020A2 (en) 1990-10-24
EP0394020A3 true EP0394020A3 (en) 1991-10-09
EP0394020B1 EP0394020B1 (en) 1994-09-14

Family

ID=26391168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900304167 Expired - Lifetime EP0394020B1 (en) 1989-04-19 1990-04-18 Ferrite particles and ferrite resin composite for bonded magnetic core and process for their production

Country Status (2)

Country Link
EP (1) EP0394020B1 (en)
DE (1) DE69012398T2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59209285D1 (en) * 1991-11-11 1998-05-20 Siemens Matsushita Components Use of a magnetic material as the coil core
JP3838730B2 (en) * 1997-02-13 2006-10-25 株式会社メイト Soft magnetic composite material
JP2002520844A (en) 1998-07-10 2002-07-09 エプコス アクチエンゲゼルシャフト Magnetizable products, their use and their production
JP3542319B2 (en) 2000-07-07 2004-07-14 昭栄化学工業株式会社 Single crystal ferrite fine powder
WO2007111793A2 (en) * 2006-02-17 2007-10-04 Steward Advanced Materials, Inc. Low velocity oxygen-fueled flame spray method and apparatus for making ferrite material products and products produced thereby
CN113871126A (en) * 2021-09-26 2021-12-31 安徽智磁新材料科技有限公司 Magnetic sepiolite nanocrystalline magnetic core and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254536A1 (en) * 1973-12-12 1975-07-11 Xerox Corp
US4268430A (en) * 1979-01-31 1981-05-19 Kanegafuchi Kagaku Kogyo Kabushiki Kaisha Ferrite composition having higher initial permeability and process for preparing molding product therefrom
EP0044592A1 (en) * 1980-07-22 1982-01-27 Koninklijke Philips Electronics N.V. Synthetic resin-bonded electromagnetic component and method of manufacturing same
US4352717A (en) * 1975-08-12 1982-10-05 Dowa Mining Co., Ltd. Apparatus for production of spherical grain ferrite powder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254536A1 (en) * 1973-12-12 1975-07-11 Xerox Corp
US4352717A (en) * 1975-08-12 1982-10-05 Dowa Mining Co., Ltd. Apparatus for production of spherical grain ferrite powder
US4268430A (en) * 1979-01-31 1981-05-19 Kanegafuchi Kagaku Kogyo Kabushiki Kaisha Ferrite composition having higher initial permeability and process for preparing molding product therefrom
EP0044592A1 (en) * 1980-07-22 1982-01-27 Koninklijke Philips Electronics N.V. Synthetic resin-bonded electromagnetic component and method of manufacturing same

Also Published As

Publication number Publication date
EP0394020A2 (en) 1990-10-24
DE69012398D1 (en) 1994-10-20
DE69012398T2 (en) 1995-02-02
EP0394020B1 (en) 1994-09-14

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