JPS55130103A - Process for producing dust magnetic material - Google Patents

Process for producing dust magnetic material

Info

Publication number
JPS55130103A
JPS55130103A JP3684479A JP3684479A JPS55130103A JP S55130103 A JPS55130103 A JP S55130103A JP 3684479 A JP3684479 A JP 3684479A JP 3684479 A JP3684479 A JP 3684479A JP S55130103 A JPS55130103 A JP S55130103A
Authority
JP
Japan
Prior art keywords
mixture
mixed
added
insulating layer
magnetic powder
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.)
Pending
Application number
JP3684479A
Other languages
Japanese (ja)
Inventor
Yoshiaki Fuda
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.)
Tokin Corp
Original Assignee
Tohoku Metal Industries Ltd
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
Application filed by Tohoku Metal Industries Ltd filed Critical Tohoku Metal Industries Ltd
Priority to JP3684479A priority Critical patent/JPS55130103A/en
Publication of JPS55130103A publication Critical patent/JPS55130103A/en
Pending 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
    • H01F1/14—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 metals or alloys
    • H01F1/20—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 metals or alloys in the form of particles, e.g. powder
    • H01F1/22—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 metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24—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 metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

PURPOSE:To improve the electric resistance of a metallic magnetic powder without losing its magnetic characteristics by coating the particle surface of the magnetic powder with an inorganic insulating layer, coating the insulating layer with an organic insulating layer and pressure molding the magnetic powder. CONSTITUTION:0.5wt% Of water-glass of aqueous solvent is added as an inorganic insulating agent to pure iron powder having a mean grain size of 200mum, the mixture is mixed, dried, 0.5wt% of phenol resin of thinner solvent is added as an organic insulating binder to the mixture, and the mixture is mixed and dried. After this drying step, 0.1wt% of zinc stearate is added as a lubricant to the mixture, the mixture is mixed and pressure molded in a ring shape to form a dust core.
JP3684479A 1979-03-30 1979-03-30 Process for producing dust magnetic material Pending JPS55130103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3684479A JPS55130103A (en) 1979-03-30 1979-03-30 Process for producing dust magnetic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3684479A JPS55130103A (en) 1979-03-30 1979-03-30 Process for producing dust magnetic material

Publications (1)

Publication Number Publication Date
JPS55130103A true JPS55130103A (en) 1980-10-08

Family

ID=12481062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3684479A Pending JPS55130103A (en) 1979-03-30 1979-03-30 Process for producing dust magnetic material

Country Status (1)

Country Link
JP (1) JPS55130103A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59119710A (en) * 1982-12-27 1984-07-11 Toshiba Corp Iron core
JPS601816A (en) * 1983-05-05 1985-01-08 ゼネラル・エレクトリツク・カンパニイ Iron powder core magnetic device
US4508567A (en) * 1981-07-02 1985-04-02 Brother Kogyo Kabushiki Kaisha Press-molding process for preparing a powder compact
US4601753A (en) * 1983-05-05 1986-07-22 General Electric Company Powdered iron core magnetic devices
JPS61222207A (en) * 1985-03-28 1986-10-02 Toshiba Corp Manufacture of iron core
JPS61296704A (en) * 1985-06-26 1986-12-27 Toshiba Corp Manufacture of core
US5800636A (en) * 1996-01-16 1998-09-01 Tdk Corporation Dust core, iron powder therefor and method of making
KR100341627B1 (en) * 1998-07-29 2002-06-22 사토 히로시 Ferromagnetic powder for dust cores, dust core, and dust core fabrication process
WO2008084756A1 (en) * 2007-01-12 2008-07-17 Toyota Jidosha Kabushiki Kaisha Magnetic powder, dust core, motor and reactor
JP2009158652A (en) * 2007-12-26 2009-07-16 Panasonic Corp Compound magnetic material and manufacturing method thereof
CN109545537A (en) * 2018-12-28 2019-03-29 东莞铭普光磁股份有限公司 A kind of powder core and preparation method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508567A (en) * 1981-07-02 1985-04-02 Brother Kogyo Kabushiki Kaisha Press-molding process for preparing a powder compact
JPH0416004B2 (en) * 1982-12-27 1992-03-19 Tokyo Shibaura Electric Co
JPS59119710A (en) * 1982-12-27 1984-07-11 Toshiba Corp Iron core
JPS601816A (en) * 1983-05-05 1985-01-08 ゼネラル・エレクトリツク・カンパニイ Iron powder core magnetic device
US4601765A (en) * 1983-05-05 1986-07-22 General Electric Company Powdered iron core magnetic devices
US4601753A (en) * 1983-05-05 1986-07-22 General Electric Company Powdered iron core magnetic devices
JPS61222207A (en) * 1985-03-28 1986-10-02 Toshiba Corp Manufacture of iron core
JPS61296704A (en) * 1985-06-26 1986-12-27 Toshiba Corp Manufacture of core
US5800636A (en) * 1996-01-16 1998-09-01 Tdk Corporation Dust core, iron powder therefor and method of making
KR100341627B1 (en) * 1998-07-29 2002-06-22 사토 히로시 Ferromagnetic powder for dust cores, dust core, and dust core fabrication process
WO2008084756A1 (en) * 2007-01-12 2008-07-17 Toyota Jidosha Kabushiki Kaisha Magnetic powder, dust core, motor and reactor
JP2009158652A (en) * 2007-12-26 2009-07-16 Panasonic Corp Compound magnetic material and manufacturing method thereof
CN109545537A (en) * 2018-12-28 2019-03-29 东莞铭普光磁股份有限公司 A kind of powder core and preparation method thereof

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