AT313337B - Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung - Google Patents

Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung

Info

Publication number
AT313337B
AT313337B AT83669A AT83669A AT313337B AT 313337 B AT313337 B AT 313337B AT 83669 A AT83669 A AT 83669A AT 83669 A AT83669 A AT 83669A AT 313337 B AT313337 B AT 313337B
Authority
AT
Austria
Prior art keywords
iron
producing
magnetic recording
consisting essentially
stable powder
Prior art date
Application number
AT83669A
Other languages
English (en)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of AT313337B publication Critical patent/AT313337B/de

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
    • H01F1/04—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 metals or alloys
    • H01F1/06—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 metals or alloys in the form of particles, e.g. powder
    • H01F1/065—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 metals or alloys in the form of particles, e.g. powder obtained by a reduction
    • 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
    • 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
    • G11B5/70626—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 containing non-metallic substances
    • G11B5/70642—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 containing non-metallic substances iron oxides
    • G11B5/70652—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 containing non-metallic substances iron oxides gamma - Fe2 O3
    • G11B5/70668—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 containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Paints Or Removers (AREA)
AT83669A 1968-01-31 1969-01-28 Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung AT313337B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6801383.A NL160106C (nl) 1968-01-31 1968-01-31 Werkwijze ter bereiding van een in hoofdzaak uit ijzer bestaand magnetisch stabiel poeder, voor magnetische registratie.

Publications (1)

Publication Number Publication Date
AT313337B true AT313337B (de) 1974-02-11

Family

ID=19802639

Family Applications (1)

Application Number Title Priority Date Filing Date
AT83669A AT313337B (de) 1968-01-31 1969-01-28 Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung

Country Status (9)

Country Link
US (1) US3598568A (de)
AT (1) AT313337B (de)
BE (1) BE727606A (de)
CH (1) CH510118A (de)
DE (1) DE1902270B2 (de)
FR (1) FR1602579A (de)
GB (1) GB1192167A (de)
NL (1) NL160106C (de)
SE (1) SE352768B (de)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902888A (en) * 1971-08-19 1975-09-02 Fuji Photo Film Co Ltd Process for preparing ferromagnetic alloy powder
DE2212933A1 (de) * 1972-03-17 1973-09-20 Philips Nv Verfahren zur herstellung eines im wesentlichen aus eisen bestehenden metallpulvers
NL167729C (nl) * 1973-05-03 1982-01-18 Philips Nv Werkwijze voor het bereiden van een hoofdzakelijk uit ijzer bestaand metaalpoeder.
DE2361539C2 (de) * 1973-12-11 1984-06-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur Herstellung eines ferromagnetischen, überwiegend aus Eisen bestehenden Materials
IT1026663B (it) * 1974-11-29 1978-10-20 Montedison Spa Procedimento per preparare polve ri metalliche a base di ferro per registrzione hagnetica
US3967986A (en) * 1975-01-27 1976-07-06 U.S. Philips Corporation Method of preparing ferromagnetic material
DE2611281A1 (de) * 1975-03-17 1976-09-30 Hitachi Ltd Verfahren zur herstellung von ferromagnetischem metallpulver
JPS6044805B2 (ja) * 1976-08-27 1985-10-05 日本ビクター株式会社 磁気記録媒体の製造方法
DE2646348C2 (de) * 1976-10-14 1986-08-28 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigen, ferromagnetischen, im wesentlichen aus Eisen bestehenden Metallteilchen und deren Verwendung zur Herstellung von magnetischen Aufzeichnungsträgern
JPS5376957A (en) * 1976-12-20 1978-07-07 Hitachi Maxell Magnetic metal iron powder and said manufacturing process
JPS54122664A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
JPS54122663A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
US4165232A (en) * 1978-09-15 1979-08-21 Basf Aktiengesellschaft Manufacture of ferromagnetic metal particles essentially consisting of iron
DE2909480A1 (de) * 1979-03-10 1980-09-11 Bayer Ag Ferromagnetisches, im wesentlichen aus eisen bestehendes metallpigment und verfahren zu dessen herstellung
EP0041257B1 (de) * 1980-05-30 1984-11-14 Hitachi Maxell Ltd. Verfahren zur Herstellung ferromagnetischer Teilchen aus metallischem Eisen
US4305753A (en) * 1980-07-31 1981-12-15 Hercules Incorporated Process for producing ferromagnetic metallic particles
US4400337A (en) * 1981-01-10 1983-08-23 Hitachi Maxell, Ltd. Method for production of metal magnetic particles
US4437881A (en) 1982-07-31 1984-03-20 Toda Kogyo Corp. Acicular ferromagnetic alloy particles and process for producing said particles
JPS5980901A (ja) * 1982-11-01 1984-05-10 Fuji Photo Film Co Ltd 強磁性金属粉末の製造法
US5110658A (en) * 1987-10-19 1992-05-05 Konica Corporation Magnetic recording medium

Also Published As

Publication number Publication date
BE727606A (de) 1969-07-29
SE352768B (de) 1973-01-08
NL160106C (nl) 1979-09-17
CH510118A (de) 1971-07-15
NL160106B (nl) 1979-04-17
GB1192167A (en) 1970-05-20
DE1902270B2 (de) 1975-04-30
US3598568A (en) 1971-08-10
NL6801383A (de) 1969-08-04
DE1902270A1 (de) 1969-09-04
FR1602579A (de) 1970-12-28

Similar Documents

Publication Publication Date Title
AT313337B (de) Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung
AT313338B (de) Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung
CH549528A (de) Verfahren zur herstellung eines fuer magnetische aufzeichnung geeigneten pulvers aus eisennitrid.
AT306764B (de) Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Metallpulvers für magnetische Aufzeichnung
AT298101B (de) Verfahren zur Herstellung einer Polschuhplatte für einen Magnetkopf
AT326764B (de) Verfahren zur herstellung eines polrades für magnetgeneratoren
AT295878B (de) Verfahren zur Herstellung eines magnetischen Übertragers
AT306763B (de) Verfahren zur Herstellung eines wenigstens im wesentlichen aus Eisen bestehenden Metallpulvers für magnetische Aufzeichnung
AT251308B (de) Verfahren zur Herstellung eines Magnetaufzeichnungsbandes
AT301890B (de) Verfahren zur Herstellung eines Dauermagneten
CH408226A (de) Verfahren zur Herstellung eines Magnetkerns und nach dem Verfahren hergestellter Magnetkern
CH508960A (de) Mehrspuriger Magnetkopf und Verfahren zu dessen Herstellung
AT329710B (de) Verfahren zur herstellung eines magnettonbandlackes
AT254548B (de) Verfahren zur Herstellung eines aus mehreren plattenförmigen Köpfen aufgebauten Mehrspur-Magnetkopfes
CH329794A (de) Verfahren zur Herstellung magnetischer Aufzeichnungen
AT298823B (de) Verfahren zur Herstellung eines Materials für magnetische Aufzeichnung
CH519770A (de) Verfahren zur Herstellung eines Dauermagneten
AT273523B (de) Verfahren zur Herstellung eines Magnetkopfes
AT285190B (de) Magnetkern aus einem titanhaltigen Mangan-Zink-Ferroferrit und Verfahren zu seiner Herstellung
CH437558A (de) Verfahren zur Herstellung eines Magnetkerns und nach diesem Verfahren hergestellter Magnetkern
AT296646B (de) Verfahren zur Herstellung eines Magnetkopfes
CH495603A (de) Verfahren zur Herstellung eines Magnetkopfes
CH460865A (de) Verfahren zur Herstellung eines magnetischen Aufzeichnungsträgers und nach diesem Verfahren hergestellter magnetischer Aufzeichnungsträger
CH345089A (de) Verfahren zur Herstellung eines Magnetkerns mit einer nahezu rechteckigen Hystereseschleife
AT311078B (de) Verfahren zur Herstellung eines Magnetkopfes

Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee