AT298823B - A method of manufacturing a magnetic recording material - Google Patents

A method of manufacturing a magnetic recording material

Info

Publication number
AT298823B
AT298823B AT544470A AT544470A AT298823B AT 298823 B AT298823 B AT 298823B AT 544470 A AT544470 A AT 544470A AT 544470 A AT544470 A AT 544470A AT 298823 B AT298823 B AT 298823B
Authority
AT
Austria
Prior art keywords
manufacturing
magnetic recording
recording material
magnetic
recording
Prior art date
Application number
AT544470A
Other languages
German (de)
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 AT298823B publication Critical patent/AT298823B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • 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
    • G11B5/70647—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 with a skin
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
AT544470A 1969-06-20 1970-06-17 A method of manufacturing a magnetic recording material AT298823B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6909443A NL6909443A (en) 1969-06-20 1969-06-20

Publications (1)

Publication Number Publication Date
AT298823B true AT298823B (en) 1972-05-25

Family

ID=19807253

Family Applications (1)

Application Number Title Priority Date Filing Date
AT544470A AT298823B (en) 1969-06-20 1970-06-17 A method of manufacturing a magnetic recording material

Country Status (7)

Country Link
AT (1) AT298823B (en)
BE (1) BE752202A (en)
CH (1) CH531904A (en)
DE (1) DE2028536A1 (en)
FR (1) FR2046957B1 (en)
GB (1) GB1265768A (en)
NL (1) NL6909443A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2361539C2 (en) * 1973-12-11 1984-06-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Process for the production of a ferromagnetic material consisting predominantly of iron
IT1026663B (en) * 1974-11-29 1978-10-20 Montedison Spa PROCEDURE FOR PREPARING IRON-BASED METALLIC POWDERS FOR HAGNETIC REGISTRATION
DE3021111A1 (en) 1980-06-04 1981-12-17 Basf Ag, 6700 Ludwigshafen METHOD FOR THE PRODUCTION OF NEEDLE-SHAPED, FERROMAGNETIC METAL PARTICLES, ESSENTIALLY made of IRON
DE3116489A1 (en) 1981-04-25 1982-11-11 Basf Ag, 6700 Ludwigshafen METHOD FOR STABILIZING PYROPHORES, SUBSTANTIALLY IRON, FERROMAGNETIC, NEEDLE-SHAPED METAL PARTICLES
DE4115426A1 (en) * 1991-05-10 1992-11-12 Basf Magnetics Gmbh METHOD FOR THE STABILIZATION OF NEEDLE-SHAPED, FERROMAGNETIC METAL POWDERS, CONSISTENTLY OF IRON
WO1993009900A1 (en) * 1991-11-22 1993-05-27 Ampex Media Corporation Storage of metal particles

Also Published As

Publication number Publication date
DE2028536A1 (en) 1970-12-23
CH531904A (en) 1972-12-31
NL6909443A (en) 1970-12-22
FR2046957B1 (en) 1973-01-12
FR2046957A1 (en) 1971-03-12
GB1265768A (en) 1972-03-08
BE752202A (en) 1970-12-18

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Legal Events

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