JPS6350842B2 - - Google Patents

Info

Publication number
JPS6350842B2
JPS6350842B2 JP57208937A JP20893782A JPS6350842B2 JP S6350842 B2 JPS6350842 B2 JP S6350842B2 JP 57208937 A JP57208937 A JP 57208937A JP 20893782 A JP20893782 A JP 20893782A JP S6350842 B2 JPS6350842 B2 JP S6350842B2
Authority
JP
Japan
Prior art keywords
axis length
emu
cake
average
feooh
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.)
Expired
Application number
JP57208937A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5999706A (ja
Inventor
Katsuhiro Takano
Yoshishige Koma
Masaru Hagiwara
Shintaro Suzuki
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.)
Kanto Denka Kogyo Co Ltd
Original Assignee
Kanto Denka Kogyo 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 Kanto Denka Kogyo Co Ltd filed Critical Kanto Denka Kogyo Co Ltd
Priority to JP57208937A priority Critical patent/JPS5999706A/ja
Priority to US06/550,114 priority patent/US4497654A/en
Priority to NL8303968A priority patent/NL191843C/xx
Priority to GB08331273A priority patent/GB2131047B/en
Priority to DE19833343019 priority patent/DE3343019A1/de
Priority to FR8318952A priority patent/FR2536684B1/fr
Publication of JPS5999706A publication Critical patent/JPS5999706A/ja
Publication of JPS6350842B2 publication Critical patent/JPS6350842B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70605—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys
    • G11B5/70615—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys containing Fe metal or alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12181—Composite powder [e.g., coated, etc.]

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Magnetic Record Carriers (AREA)
  • Powder Metallurgy (AREA)
  • Paints Or Removers (AREA)
JP57208937A 1982-11-29 1982-11-29 磁気記録用強磁性金属粉末の製造方法 Granted JPS5999706A (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP57208937A JPS5999706A (ja) 1982-11-29 1982-11-29 磁気記録用強磁性金属粉末の製造方法
US06/550,114 US4497654A (en) 1982-11-29 1983-11-09 Ferromagnetic metallic powders useful for magnetic recording and processes for producing said metallic powders
NL8303968A NL191843C (nl) 1982-11-29 1983-11-18 Ferromagnetisch metalen poeder, geschikt voor een magnetisch registratiemedium en werkwijze voor het bereiden van het metallische poeder.
GB08331273A GB2131047B (en) 1982-11-29 1983-11-23 Ferromagnetic metallic powders useful for magnetic recording and processes for producing said metallic powders
DE19833343019 DE3343019A1 (de) 1982-11-29 1983-11-28 Ferromagnetische metetallische pulver, verfahren zu deren herstelung und deren verwendung zur herstellung von magnetischen aufzeichnungstraegern
FR8318952A FR2536684B1 (fr) 1982-11-29 1983-11-28 Poudres metalliques ferromagnetiques utiles a l'enregistrement magnetique, procedes de production de ces poudres metalliques et supports d'enregistrement qui en sont prepares

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57208937A JPS5999706A (ja) 1982-11-29 1982-11-29 磁気記録用強磁性金属粉末の製造方法

Publications (2)

Publication Number Publication Date
JPS5999706A JPS5999706A (ja) 1984-06-08
JPS6350842B2 true JPS6350842B2 (OSRAM) 1988-10-12

Family

ID=16564599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57208937A Granted JPS5999706A (ja) 1982-11-29 1982-11-29 磁気記録用強磁性金属粉末の製造方法

Country Status (6)

Country Link
US (1) US4497654A (OSRAM)
JP (1) JPS5999706A (OSRAM)
DE (1) DE3343019A1 (OSRAM)
FR (1) FR2536684B1 (OSRAM)
GB (1) GB2131047B (OSRAM)
NL (1) NL191843C (OSRAM)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975608A (ja) * 1982-10-25 1984-04-28 Fuji Photo Film Co Ltd 強磁性粉末及びその製造方法
DE3422916A1 (de) * 1984-06-20 1986-01-02 Bayer Ag, 5090 Leverkusen Im wesentlichen aus eisen bestehende magnetische pigmente, verfahren zu ihrer herstellung sowie deren verwendung

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB681300A (en) * 1949-05-04 1952-10-22 British Thomson Houston Co Ltd Improvements in and relating to permanent magnets
GB691869A (en) * 1949-09-07 1953-05-20 Deutsche Edelstahlwerke Ag Magnet alloys and the production of permanent magnets therefrom
GB734597A (en) * 1951-08-06 1955-08-03 Deutsche Edelstahlwerke Ag Permanent magnet alloys and the production thereof
GB743792A (en) * 1953-03-18 1956-01-25 Gen Electric Co Ltd Improvements in or relating to the production of magnetisable powder suitable for the manufacture of permanent magnets
GB750015A (en) * 1953-07-10 1956-06-06 Philips Electrical Ind Ltd Improvements in anisotropic permanent magnet alloys
GB903586A (en) * 1959-10-07 1962-08-15 Swift Levick & Sons Ltd Improvements in or relating to permanent magnets
GB982658A (en) * 1961-02-27 1965-02-10 Wado Kk Soft permanent magnets
GB1127104A (en) * 1964-06-08 1968-09-11 Int Nickel Ltd Electrical conductors and alloys for use therein
US3567525A (en) * 1968-06-25 1971-03-02 Du Pont Heat treated ferromagnetic particles
DE1931664B2 (de) * 1968-06-25 1971-04-15 E I Du Pont de Nemours and Co , Wilmington, Del (V St A ) Ferromagnetische teilchen
JPS4922630B1 (OSRAM) * 1970-06-23 1974-06-10
JPS4887397A (OSRAM) * 1972-02-23 1973-11-16
DE2434096C2 (de) * 1974-07-16 1985-10-17 Basf Ag, 6700 Ludwigshafen Nadelförmige, vorwiegend aus Eisen bestehende ferromagnetische Metallteilchen und Verfahren zu ihrer Herstellung
JPS54122664A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
DE2909995C2 (de) * 1978-03-16 1984-06-28 Kanto Denka Kogyo Co., Ltd., Tokyo Verfahren zur Herstellung eines Magnetpulvers
JPS5939814B2 (ja) * 1978-03-16 1984-09-26 ティーディーケイ株式会社 磁気記録媒体の製造方法
JPS56109827A (en) * 1980-02-05 1981-08-31 Mitsui Toatsu Chem Inc Manufacture of iron compound particle for magnetic recording medium
US4305753A (en) * 1980-07-31 1981-12-15 Hercules Incorporated Process for producing ferromagnetic metallic particles

Also Published As

Publication number Publication date
FR2536684B1 (fr) 1988-05-13
JPS5999706A (ja) 1984-06-08
NL191843C (nl) 1996-09-03
NL191843B (nl) 1996-05-01
DE3343019C2 (OSRAM) 1990-12-06
FR2536684A1 (fr) 1984-06-01
GB8331273D0 (en) 1983-12-29
GB2131047B (en) 1986-11-05
US4497654A (en) 1985-02-05
DE3343019A1 (de) 1984-05-30
GB2131047A (en) 1984-06-13
NL8303968A (nl) 1984-06-18

Similar Documents

Publication Publication Date Title
US4384892A (en) Production of magnetic powder
US4447264A (en) Production of magnetic powder
JPS6350842B2 (OSRAM)
JPS5835241B2 (ja) 鉄−銅を主成分とする合金磁性粉の製造方法
JPS60255628A (ja) 磁気記録用板状Ｂａフエライト微粒子粉末及びその製造法
JPH032321B2 (OSRAM)
JPH0312125B2 (OSRAM)
KR19990077521A (ko) 방추형괴타이트입자및그의제조방법
JPS64801B2 (OSRAM)
JPS62139803A (ja) 強磁性金属粉の製造方法
JP3303896B2 (ja) 紡錘状を呈した鉄を主成分とする金属磁性粒子粉末及びその製造法
JPH0343325B2 (OSRAM)
JPH08165501A (ja) コバルトと鉄とを主成分とする紡錘状金属磁性粒子粉末及びその製造法
JPS6349722B2 (OSRAM)
JP2735885B2 (ja) 磁気記録用金属磁性粉末の製造方法
JP3176735B2 (ja) 強磁性酸化物粉の製造方法
JPS60262906A (ja) 金属磁性粉末及びその製造法
JPS609321B2 (ja) 磁気記録媒体及びその製造方法
JP3446960B2 (ja) α−オキシ水酸化鉄を用いた磁気記録用磁性金属粉末の製造方法
JP3141907B2 (ja) 紡錘状を呈した鉄を主成分とする金属磁性粒子粉末の製造法
JPH0343324B2 (OSRAM)
JPS6244842B2 (OSRAM)
JPH08208235A (ja) 偏平状マグネタイト微粒子粉末の製造法
JPH03250702A (ja) 金属磁性粉末の製造方法
JPS59172209A (ja) 金属磁性粉末およびその製造方法