FR2230590A1 - - Google Patents

Info

Publication number
FR2230590A1
FR2230590A1 FR7417886A FR7417886A FR2230590A1 FR 2230590 A1 FR2230590 A1 FR 2230590A1 FR 7417886 A FR7417886 A FR 7417886A FR 7417886 A FR7417886 A FR 7417886A FR 2230590 A1 FR2230590 A1 FR 2230590A1
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.)
Granted
Application number
FR7417886A
Other versions
FR2230590B1 (fr
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of FR2230590A1 publication Critical patent/FR2230590A1/fr
Application granted granted Critical
Publication of FR2230590B1 publication Critical patent/FR2230590B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/22—Compounds of iron
    • C09C1/24—Oxides of iron
    • 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
    • G11B5/70673—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 containing Co

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Iron (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Hard Magnetic Materials (AREA)
FR7417886A 1973-05-22 1974-05-22 Expired FR2230590B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732325925 DE2325925A1 (de) 1973-05-22 1973-05-22 Verfahren zur herstellung von nadelfoermigen kobalthaltigen ferrimagnetischen eisenoxiden

Publications (2)

Publication Number Publication Date
FR2230590A1 true FR2230590A1 (fr) 1974-12-20
FR2230590B1 FR2230590B1 (fr) 1978-01-27

Family

ID=5881735

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7417886A Expired FR2230590B1 (fr) 1973-05-22 1974-05-22

Country Status (7)

Country Link
JP (1) JPS5019699A (fr)
BE (1) BE815266A (fr)
DE (1) DE2325925A1 (fr)
FR (1) FR2230590B1 (fr)
GB (1) GB1458623A (fr)
IT (1) IT1011466B (fr)
NL (1) NL7406765A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146100A2 (fr) * 1983-12-16 1985-06-26 BASF Aktiengesellschaft Procédé pour la fabrication d'oxyde de fer isotrope magnétique contenant du cobalt et leur application
EP0147709A2 (fr) * 1983-12-16 1985-07-10 BASF Aktiengesellschaft Procédé pour la fabrication d'oxyde de fer isotrope magnétique contenant du cobalt et leur utilisation
EP0176919A2 (fr) * 1984-09-28 1986-04-09 BASF Aktiengesellschaft Procédé de préparation de poudre fine de ferrite isotrope à structure spinelle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2705967C2 (de) * 1977-02-12 1990-01-04 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
DE2916403A1 (de) 1979-04-23 1980-11-06 Basf Ag Nadelfoermiges magnetisches eisenoxid und verfahren zu seiner herstellung
JPS5819733A (ja) * 1981-07-28 1983-02-04 Toshiba Corp 磁気記録媒体及びその製造方法
SE441683B (sv) 1983-03-18 1985-10-28 Adcon Ab Forfarande vid fergbehandling av textila material samt anvendning av en anordning for genomforande av forfarandet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1221434A (en) * 1967-02-08 1971-02-03 Bayer Ag PROCESS FOR THE PRODUCTION OF HIGHLY COERCIVE NEEDLE-SHAPED gamma-Fe2O3 AND MAGNETIC RECORDING MEMBERS PREPARED THEREWITH
DE2100390A1 (de) * 1970-03-11 1971-09-30 Ampex Verfahren zur Herstellung von nadel förmigen, metallhaltigen gamma Eisen III Oxid Teilchen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1221434A (en) * 1967-02-08 1971-02-03 Bayer Ag PROCESS FOR THE PRODUCTION OF HIGHLY COERCIVE NEEDLE-SHAPED gamma-Fe2O3 AND MAGNETIC RECORDING MEMBERS PREPARED THEREWITH
DE2100390A1 (de) * 1970-03-11 1971-09-30 Ampex Verfahren zur Herstellung von nadel förmigen, metallhaltigen gamma Eisen III Oxid Teilchen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146100A2 (fr) * 1983-12-16 1985-06-26 BASF Aktiengesellschaft Procédé pour la fabrication d'oxyde de fer isotrope magnétique contenant du cobalt et leur application
EP0147709A2 (fr) * 1983-12-16 1985-07-10 BASF Aktiengesellschaft Procédé pour la fabrication d'oxyde de fer isotrope magnétique contenant du cobalt et leur utilisation
EP0147709A3 (en) * 1983-12-16 1987-05-27 Basf Aktiengesellschaft Process for producing isotropical magnetic-iron oxides containing cobalt
EP0146100A3 (en) * 1983-12-16 1987-06-03 Basf Aktiengesellschaft Process for producing isotropical magnetic-iron oxides containing cobalt
EP0176919A2 (fr) * 1984-09-28 1986-04-09 BASF Aktiengesellschaft Procédé de préparation de poudre fine de ferrite isotrope à structure spinelle
EP0176919A3 (en) * 1984-09-28 1989-03-29 Basf Aktiengesellschaft Process for the preparation of fine isotropical ferrite powder having a spinel structure

Also Published As

Publication number Publication date
DE2325925A1 (de) 1974-12-12
IT1011466B (it) 1977-01-20
BE815266A (fr) 1974-11-20
FR2230590B1 (fr) 1978-01-27
GB1458623A (en) 1976-12-15
NL7406765A (fr) 1974-11-26
JPS5019699A (fr) 1975-03-01

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Legal Events

Date Code Title Description
ST Notification of lapse