FR2498587B1 - - Google Patents

Info

Publication number
FR2498587B1
FR2498587B1 FR8026991A FR8026991A FR2498587B1 FR 2498587 B1 FR2498587 B1 FR 2498587B1 FR 8026991 A FR8026991 A FR 8026991A FR 8026991 A FR8026991 A FR 8026991A FR 2498587 B1 FR2498587 B1 FR 2498587B1
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
FR8026991A
Other languages
French (fr)
Other versions
FR2498587A1 (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.)
Aimants Ugimac SA
Original Assignee
Aimants Ugimac SA
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 Aimants Ugimac SA filed Critical Aimants Ugimac SA
Priority to FR8026991A priority Critical patent/FR2498587A1/en
Publication of FR2498587A1 publication Critical patent/FR2498587A1/en
Application granted granted Critical
Publication of FR2498587B1 publication Critical patent/FR2498587B1/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
    • C01G49/08—Ferroso-ferric oxide [Fe3O4]
    • 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70689—Magnetite
    • 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
    • H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
    • H01F1/445—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a compound, e.g. Fe3O4
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • 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
    • C01P2006/12—Surface area
    • 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)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
FR8026991A 1980-12-16 1980-12-16 Magnetic iron oxide powder mfr. - by wet grinding non magnetic iron oxide with steel balls in steel mill Granted FR2498587A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8026991A FR2498587A1 (en) 1980-12-16 1980-12-16 Magnetic iron oxide powder mfr. - by wet grinding non magnetic iron oxide with steel balls in steel mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8026991A FR2498587A1 (en) 1980-12-16 1980-12-16 Magnetic iron oxide powder mfr. - by wet grinding non magnetic iron oxide with steel balls in steel mill

Publications (2)

Publication Number Publication Date
FR2498587A1 FR2498587A1 (en) 1982-07-30
FR2498587B1 true FR2498587B1 (en) 1984-11-02

Family

ID=9249276

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8026991A Granted FR2498587A1 (en) 1980-12-16 1980-12-16 Magnetic iron oxide powder mfr. - by wet grinding non magnetic iron oxide with steel balls in steel mill

Country Status (1)

Country Link
FR (1) FR2498587A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5958282A (en) * 1997-02-21 1999-09-28 Ferrofluidic Corporation Low cost method for manufacturing ferrofluid
US6068785A (en) * 1998-02-10 2000-05-30 Ferrofluidics Corporation Method for manufacturing oil-based ferrofluid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904540A (en) * 1972-02-11 1975-09-09 Pfizer Magnetic impulse record member
FR2353110A1 (en) * 1976-03-12 1977-12-23 Kodak Pathe NEW MAGNETIC RECORDING PRODUCT AND PROCESS FOR ITS PREPARATION

Also Published As

Publication number Publication date
FR2498587A1 (en) 1982-07-30

Similar Documents

Publication Publication Date Title
DE3031890C2 (en)
FR2478909B1 (en)
FR2474803B1 (en)
FR2473360B1 (en)
DE3152593A1 (en)
DE3176516T2 (en)
FR2473847B1 (en)
FR2478228B1 (en)
DE3019303C2 (en)
DE3127313C2 (en)
DE3139623C2 (en)
DE3107738C2 (en)
DE3047970C2 (en)
FR2478244B1 (en)
FR2477888B1 (en)
FR2478750B1 (en)
DE3134521C2 (en)
FR2477641B1 (en)
GR75215B (en)
FR2475358B3 (en)
FR2475091B1 (en)
FR2472946B1 (en)
IN156404B (en)
FR2477873B1 (en)
FR2476696B1 (en)

Legal Events

Date Code Title Description
ST Notification of lapse