FR2380225A1 - Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt - Google Patents

Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt

Info

Publication number
FR2380225A1
FR2380225A1 FR7803784A FR7803784A FR2380225A1 FR 2380225 A1 FR2380225 A1 FR 2380225A1 FR 7803784 A FR7803784 A FR 7803784A FR 7803784 A FR7803784 A FR 7803784A FR 2380225 A1 FR2380225 A1 FR 2380225A1
Authority
FR
France
Prior art keywords
iron oxide
needles
magnetic iron
preparing magnetic
degrees
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.)
Granted
Application number
FR7803784A
Other languages
English (en)
French (fr)
Other versions
FR2380225B1 (enExample
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of FR2380225A1 publication Critical patent/FR2380225A1/fr
Application granted granted Critical
Publication of FR2380225B1 publication Critical patent/FR2380225B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide [Fe2O3]
    • 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
    • G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
    • 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
    • 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/50—Solid solutions
    • C01P2002/52—Solid solutions containing elements as dopants
    • C01P2002/54—Solid solutions containing elements as dopants one element only
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
FR7803784A 1977-02-12 1978-02-10 Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt Granted FR2380225A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2705967A DE2705967C2 (de) 1977-02-12 1977-02-12 Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid

Publications (2)

Publication Number Publication Date
FR2380225A1 true FR2380225A1 (fr) 1978-09-08
FR2380225B1 FR2380225B1 (enExample) 1984-08-31

Family

ID=6001002

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7803784A Granted FR2380225A1 (fr) 1977-02-12 1978-02-10 Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt

Country Status (5)

Country Link
US (1) US4188302A (enExample)
JP (1) JPS53100197A (enExample)
DE (1) DE2705967C2 (enExample)
FR (1) FR2380225A1 (enExample)
GB (1) GB1594654A (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397049A1 (fr) * 1977-07-04 1979-02-02 Sony Corp Procede de fabrication de poudres magnetiques et poudres et supports munis de telles poudres ainsi obtenues
EP0014902A1 (de) * 1979-02-13 1980-09-03 BASF Aktiengesellschaft Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
EP0014903A1 (de) * 1979-02-13 1980-09-03 BASF Aktiengesellschaft Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
FR2510804A1 (fr) * 1981-07-28 1983-02-04 Ishihara Mining & Chemical Co Procede de preparation d'un oxyde de fer ferromagnetique contenant du cobalt
EP0515748A3 (en) * 1991-05-31 1993-11-03 Toda Kogyo Corp Process for producing acicular goethite particles and acicular magnetic iron oxide particles
EP0515749A3 (en) * 1991-05-31 1993-11-03 Toda Kogyo Corp Process for producing acicular goethite particles and acicular magnetic iron oxide particles

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
DE2916403A1 (de) * 1979-04-23 1980-11-06 Basf Ag Nadelfoermiges magnetisches eisenoxid und verfahren zu seiner herstellung
US4657816A (en) * 1982-04-19 1987-04-14 Memorex Corporation Ferromagnetic recording materials
JPS59207024A (ja) * 1983-05-10 1984-11-24 Konishiroku Photo Ind Co Ltd 磁気記録媒体
DE3407722A1 (de) * 1984-03-02 1985-09-05 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung kobalthaltiger, isotroper magnetischer eisenoxide
US4683167A (en) * 1984-06-25 1987-07-28 Ampex Corporation Magnetic iron oxide pigment and recording media
JPS6117426A (ja) * 1984-07-04 1986-01-25 Sony Corp コバルト含有酸化鉄磁性粉の製造方法
JPS62108738A (ja) * 1985-11-08 1987-05-20 Fuji Photo Film Co Ltd 強磁性酸化鉄粉末の製造方法
US5219554A (en) * 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
US5069216A (en) * 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974400A (enExample) * 1972-11-24 1974-07-18
JPS5085612A (enExample) * 1973-11-30 1975-07-10
GB1441183A (en) * 1973-03-05 1976-06-30 Tdk Electronics Co Ltd Magnetic recording particles

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA988704A (en) * 1971-07-19 1976-05-11 Akira Okazoe Ferro-magnetic acicular particles for recording medium
BE790376A (fr) * 1971-10-27 1973-02-15 Ampex Particules d'oxyde de fer magnétique dopé au cobalt
NL180000C (nl) * 1972-04-21 1986-12-16 Anvar Werkwijze voor de bereiding van een fijnverdeeld poeder uit een vaste oplossing van met een of meer tweewaardige metalen gesubstitueerd gamma-feÿ2oÿ3.
JPS5125974B2 (enExample) * 1972-08-28 1976-08-03
DE2243231C2 (de) * 1972-09-01 1982-01-28 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von Cobalt-dotiertem γ-Eisen(III)oxid
JPS5224237B2 (enExample) 1972-11-24 1977-06-29
US3873462A (en) * 1973-04-27 1975-03-25 American Cyanamid Co Cobalt modified iron oxides
DE2325925A1 (de) * 1973-05-22 1974-12-12 Bayer Ag Verfahren zur herstellung von nadelfoermigen kobalthaltigen ferrimagnetischen eisenoxiden
JPS5236863B2 (enExample) * 1973-08-07 1977-09-19
GB1482157A (en) * 1974-05-06 1977-08-10 Pfizer Cobalt acicular gamma ferric oxide
JPS604566B2 (ja) * 1974-06-28 1985-02-05 富士写真フイルム株式会社 強磁性粉末及びこれを使用した磁気記録体の安定化方法
JPS5123039A (ja) * 1974-08-21 1976-02-24 Tokyo Shibaura Electric Co Hyojiseigyohoshiki
JPS52558A (en) * 1975-06-20 1977-01-05 Murai:Kk Cold press formation of shoe heel
JPS525497A (en) * 1975-07-02 1977-01-17 Fuji Photo Film Co Ltd Ferromagnetic grit manufacturing process
JPS608606B2 (ja) * 1975-07-02 1985-03-04 富士写真フイルム株式会社 強磁性粉末の製法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974400A (enExample) * 1972-11-24 1974-07-18
GB1441183A (en) * 1973-03-05 1976-06-30 Tdk Electronics Co Ltd Magnetic recording particles
JPS5085612A (enExample) * 1973-11-30 1975-07-10

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397049A1 (fr) * 1977-07-04 1979-02-02 Sony Corp Procede de fabrication de poudres magnetiques et poudres et supports munis de telles poudres ainsi obtenues
EP0014902A1 (de) * 1979-02-13 1980-09-03 BASF Aktiengesellschaft Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
EP0014903A1 (de) * 1979-02-13 1980-09-03 BASF Aktiengesellschaft Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
FR2510804A1 (fr) * 1981-07-28 1983-02-04 Ishihara Mining & Chemical Co Procede de preparation d'un oxyde de fer ferromagnetique contenant du cobalt
EP0515748A3 (en) * 1991-05-31 1993-11-03 Toda Kogyo Corp Process for producing acicular goethite particles and acicular magnetic iron oxide particles
EP0515749A3 (en) * 1991-05-31 1993-11-03 Toda Kogyo Corp Process for producing acicular goethite particles and acicular magnetic iron oxide particles
US5399278A (en) * 1991-05-31 1995-03-21 Toda Kogyo Corp. Process for producing acicular goethite particles and acicular magnetic iron oxide particles
US5480571A (en) * 1991-05-31 1996-01-02 Toda Kogyo Corp. Process for producing acicular goethite particles and acicular magnetic iron oxide particles

Also Published As

Publication number Publication date
JPS619250B2 (enExample) 1986-03-20
GB1594654A (en) 1981-08-05
DE2705967A1 (de) 1978-08-17
JPS53100197A (en) 1978-09-01
US4188302A (en) 1980-02-12
FR2380225B1 (enExample) 1984-08-31
DE2705967C2 (de) 1990-01-04

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Legal Events

Date Code Title Description
ST Notification of lapse