JPS56118305A - Manufacture of magnetic powder - Google Patents

Manufacture of magnetic powder

Info

Publication number
JPS56118305A
JPS56118305A JP2259080A JP2259080A JPS56118305A JP S56118305 A JPS56118305 A JP S56118305A JP 2259080 A JP2259080 A JP 2259080A JP 2259080 A JP2259080 A JP 2259080A JP S56118305 A JPS56118305 A JP S56118305A
Authority
JP
Japan
Prior art keywords
manufacture
magnetic powder
magnetic flux
flux density
value
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
JP2259080A
Other languages
Japanese (ja)
Other versions
JPS6217841B2 (en
Inventor
Yasuo Watanabe
Toshio Ueda
Seiji Isoyama
Masahiko Bannou
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.)
Dowa Holdings Co Ltd
Original Assignee
Dowa Mining Co 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 Dowa Mining Co Ltd filed Critical Dowa Mining Co Ltd
Priority to JP2259080A priority Critical patent/JPS56118305A/en
Publication of JPS56118305A publication Critical patent/JPS56118305A/en
Publication of JPS6217841B2 publication Critical patent/JPS6217841B2/ja
Granted 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
    • H01F1/032—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 hard-magnetic materials
    • H01F1/10—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Ceramics (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To decrease the antimagnetic force while holding the residual magnetic flux density at a fixed value by forming a magnetoplumbite type ferrite dielectric. CONSTITUTION:Formed is a magnetoplumbite type ferrite dielectric represented by formula I (where M1 is one, two or three coexisting metals selected from Ba, Sr and Ca; M2 is one or two coexisting metals selected from Mn, Zn, Mg, Co, Ni and Cu; and m is a value within a ragne of m=2Fe/(M1+2M2)=6.5-9.0. Thereby, the antimagnetic force can be lowered to 1,000-1,500Oe while the residual magnetic flux density is being maintained at a standard value within 1,000-1,300.
JP2259080A 1980-02-25 1980-02-25 Manufacture of magnetic powder Granted JPS56118305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2259080A JPS56118305A (en) 1980-02-25 1980-02-25 Manufacture of magnetic powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2259080A JPS56118305A (en) 1980-02-25 1980-02-25 Manufacture of magnetic powder

Publications (2)

Publication Number Publication Date
JPS56118305A true JPS56118305A (en) 1981-09-17
JPS6217841B2 JPS6217841B2 (en) 1987-04-20

Family

ID=12087057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2259080A Granted JPS56118305A (en) 1980-02-25 1980-02-25 Manufacture of magnetic powder

Country Status (1)

Country Link
JP (1) JPS56118305A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211904A (en) * 1984-04-06 1985-10-24 Ricoh Co Ltd Magnetic substance and magnetic film of metal oxide
JPS6129415A (en) * 1984-07-21 1986-02-10 Ricoh Co Ltd Magnetic recording medium
JPS62139124A (en) * 1985-12-12 1987-06-22 Toda Kogyo Corp Fine plate ba ferrite corpuscle powder for magnetic recording and its production
WO1988008611A1 (en) * 1987-04-21 1988-11-03 Ishihara Sangyo Kaisha, Ltd. Fine ferromagnetic powder for magnetic recording
US5358660A (en) * 1988-01-14 1994-10-25 Showa Denko Kabushiki Kaisha Magnetic particles for perpendicular magnetic recording

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009084125A (en) 2007-10-02 2009-04-23 Tdk Corp Method for manufacturing ferrite powder, ferrite powder, and magnetic recording medium

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211904A (en) * 1984-04-06 1985-10-24 Ricoh Co Ltd Magnetic substance and magnetic film of metal oxide
JPS6129415A (en) * 1984-07-21 1986-02-10 Ricoh Co Ltd Magnetic recording medium
JPS62139124A (en) * 1985-12-12 1987-06-22 Toda Kogyo Corp Fine plate ba ferrite corpuscle powder for magnetic recording and its production
JPH0514328B2 (en) * 1985-12-12 1993-02-24 Toda Kogyo Kk
WO1988008611A1 (en) * 1987-04-21 1988-11-03 Ishihara Sangyo Kaisha, Ltd. Fine ferromagnetic powder for magnetic recording
US5358660A (en) * 1988-01-14 1994-10-25 Showa Denko Kabushiki Kaisha Magnetic particles for perpendicular magnetic recording

Also Published As

Publication number Publication date
JPS6217841B2 (en) 1987-04-20

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