FR2046957B1 - - Google Patents

Info

Publication number
FR2046957B1
FR2046957B1 FR7022689A FR7022689A FR2046957B1 FR 2046957 B1 FR2046957 B1 FR 2046957B1 FR 7022689 A FR7022689 A FR 7022689A FR 7022689 A FR7022689 A FR 7022689A FR 2046957 B1 FR2046957 B1 FR 2046957B1
Authority
FR
France
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
FR7022689A
Other languages
French (fr)
Other versions
FR2046957A1 (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2046957A1 publication Critical patent/FR2046957A1/fr
Application granted granted Critical
Publication of FR2046957B1 publication Critical patent/FR2046957B1/fr
Expired legal-status Critical Current

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)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
FR7022689A 1969-06-20 1970-06-19 Expired FR2046957B1 (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FR2046957A1 FR2046957A1 (en) 1971-03-12
FR2046957B1 true FR2046957B1 (en) 1973-01-12

Family

ID=19807253

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7022689A Expired FR2046957B1 (en) 1969-06-20 1970-06-19

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
DE4294047T1 (en) * 1991-11-22 1996-09-26 Ampex Media Corp Storage of metal particles

Also Published As

Publication number Publication date
GB1265768A (en) 1972-03-08
FR2046957A1 (en) 1971-03-12
DE2028536A1 (en) 1970-12-23
NL6909443A (en) 1970-12-22
AT298823B (en) 1972-05-25
BE752202A (en) 1970-12-18
CH531904A (en) 1972-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse