EP0997915A3 - Flat-paticle iron powder, method for making the same and powder magnetic core using the same - Google Patents

Flat-paticle iron powder, method for making the same and powder magnetic core using the same Download PDF

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Publication number
EP0997915A3
EP0997915A3 EP99119376A EP99119376A EP0997915A3 EP 0997915 A3 EP0997915 A3 EP 0997915A3 EP 99119376 A EP99119376 A EP 99119376A EP 99119376 A EP99119376 A EP 99119376A EP 0997915 A3 EP0997915 A3 EP 0997915A3
Authority
EP
European Patent Office
Prior art keywords
same
powder
flat
magnetic core
iron 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.)
Withdrawn
Application number
EP99119376A
Other languages
German (de)
French (fr)
Other versions
EP0997915A2 (en
Inventor
Yukiko c/o Tech. Res. Laboratories Ozaki
Kuniaki c/o Tokyo Head Office Ogura
Tsutomu Yashiro
Tsuneo Murai
Hideo Hishiki
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.)
JFE Steel Corp
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
Kawasaki Steel 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
Application filed by Victor Company of Japan Ltd, Kawasaki Steel Corp filed Critical Victor Company of Japan Ltd
Publication of EP0997915A2 publication Critical patent/EP0997915A2/en
Publication of EP0997915A3 publication Critical patent/EP0997915A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/08—Cores, Yokes, or armatures made from powder

Abstract

A flat-particle iron powder, composed of reduced iron powder obtained by reducing iron oxide, has an average aspect ratio of at least 5 and an average ferrite grain size of 2 to 20 µm, is preferably used for a powder magnetic core, has high permeability over a higher frequency region, and is covered with a compound having an amine-quinone-repeating unit to further improve its magnetic characteristics.
EP99119376A 1998-10-30 1999-09-29 Flat-paticle iron powder, method for making the same and powder magnetic core using the same Withdrawn EP0997915A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP27787898 1998-10-30
JP27787898 1998-10-30

Publications (2)

Publication Number Publication Date
EP0997915A2 EP0997915A2 (en) 2000-05-03
EP0997915A3 true EP0997915A3 (en) 2000-06-21

Family

ID=17589557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99119376A Withdrawn EP0997915A3 (en) 1998-10-30 1999-09-29 Flat-paticle iron powder, method for making the same and powder magnetic core using the same

Country Status (2)

Country Link
EP (1) EP0997915A3 (en)
CA (1) CA2284139A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003041474A1 (en) * 2001-11-09 2003-05-15 Tdk Corporation Composite magnetic element, electromagnetic wave absorbing sheet, production method for sheet-form article, production method for electromagnetic wave absorbing sheet
CN113096948B (en) * 2021-03-16 2022-06-07 深圳顺络电子股份有限公司 High-permeability and high-saturation soft magnetic alloy material and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354331A (en) * 1941-05-05 1944-07-25 Wladimir J Polydoroff High-frequency ferroinductor
US5160447A (en) * 1988-02-29 1992-11-03 Kabushiki Kaisha Sankyo Seiki Seisakusho Compressed powder magnetic core and method for fabricating same
WO1996030144A1 (en) * 1995-03-28 1996-10-03 Höganäs Ab Soft magnetic anisotropic composite materials

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354331A (en) * 1941-05-05 1944-07-25 Wladimir J Polydoroff High-frequency ferroinductor
US5160447A (en) * 1988-02-29 1992-11-03 Kabushiki Kaisha Sankyo Seiki Seisakusho Compressed powder magnetic core and method for fabricating same
WO1996030144A1 (en) * 1995-03-28 1996-10-03 Höganäs Ab Soft magnetic anisotropic composite materials

Also Published As

Publication number Publication date
EP0997915A2 (en) 2000-05-03
CA2284139A1 (en) 2000-03-30

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