BE798807A - ACICULAR FERRIMAGNETIC IRON OXIDE CONTAINING COBALT AND SILICON OXIDE AND PROCESS FOR ITS PREPARATION - Google Patents

ACICULAR FERRIMAGNETIC IRON OXIDE CONTAINING COBALT AND SILICON OXIDE AND PROCESS FOR ITS PREPARATION

Info

Publication number
BE798807A
BE798807A BE130485A BE130485A BE798807A BE 798807 A BE798807 A BE 798807A BE 130485 A BE130485 A BE 130485A BE 130485 A BE130485 A BE 130485A BE 798807 A BE798807 A BE 798807A
Authority
BE
Belgium
Prior art keywords
preparation
containing cobalt
silicon oxide
iron oxide
ferrimagnetic iron
Prior art date
Application number
BE130485A
Other languages
French (fr)
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
Priority claimed from DE19722221264 external-priority patent/DE2221264C3/en
Application filed by Bayer Ag filed Critical Bayer Ag
Publication of BE798807A publication Critical patent/BE798807A/en

Links

Classifications

    • 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
    • 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
    • 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
    • G11B5/70657—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 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
    • G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
    • 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
    • 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
    • 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
    • C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
    • 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
    • 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
    • C01P2006/80—Compositional purity
BE130485A 1972-04-29 1973-04-27 ACICULAR FERRIMAGNETIC IRON OXIDE CONTAINING COBALT AND SILICON OXIDE AND PROCESS FOR ITS PREPARATION BE798807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722221264 DE2221264C3 (en) 1972-04-29 Acicular ferrimagnetic iron oxides containing cobalt and silicon oxide

Publications (1)

Publication Number Publication Date
BE798807A true BE798807A (en) 1973-10-29

Family

ID=5843730

Family Applications (1)

Application Number Title Priority Date Filing Date
BE130485A BE798807A (en) 1972-04-29 1973-04-27 ACICULAR FERRIMAGNETIC IRON OXIDE CONTAINING COBALT AND SILICON OXIDE AND PROCESS FOR ITS PREPARATION

Country Status (8)

Country Link
JP (1) JPS4941299A (en)
BE (1) BE798807A (en)
CA (1) CA1019562A (en)
FR (1) FR2183052B1 (en)
GB (1) GB1417505A (en)
IT (1) IT986077B (en)
NL (1) NL7305964A (en)
PL (1) PL85585B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5295097A (en) * 1976-02-04 1977-08-10 Nippon Telegr & Teleph Corp <Ntt> Magnetic recording material
JPS5356196A (en) * 1976-11-01 1978-05-22 Toda Kogyo Corp Process for preparing acicular alphaafeooh particle
JPS5420998A (en) * 1977-07-18 1979-02-16 Toda Kogyo Corp Method of making coocontaining acicular crystal magnetic ferrite particulates
JPS5493697A (en) * 1978-01-04 1979-07-24 Toda Kogyo Corp Manufacture of co contained needleelike crystal magnetic iron oxide particle powder

Also Published As

Publication number Publication date
PL85585B1 (en) 1976-04-30
CA1019562A (en) 1977-10-25
FR2183052B1 (en) 1976-03-05
DE2221264B2 (en) 1977-07-07
FR2183052A1 (en) 1973-12-14
GB1417505A (en) 1975-12-10
NL7305964A (en) 1973-10-31
IT986077B (en) 1975-01-10
DE2221264A1 (en) 1973-11-15
JPS4941299A (en) 1974-04-18

Similar Documents

Publication Publication Date Title
BE795896A (en) MATERIAL FOR MULTI-LAYER MAGNETIC RECORDING AND PROCESS OF PREPARATION
BE792847A (en) PROCESS FOR PREPARING ACICULAR MAGNETIC IRON OXIDES
BE779768A (en) ADSORPTION PROCESS AND INSTALLATION
BE794292A (en) PROCESS FOR PREPARING FINE-DIVIDED ACICULAR MAGNETIC IRON OXIDES
BE784913A (en) RECORDING MATERIAL SHEET AND ITS PRODUCTION PROCESS
BE752298A (en) FE4N IRON NITRIDE, SUITABLE FOR MAGNETIC RECORDING AND ITS PREPARATION PROCESS
BE807177A (en) METHOD OF MANUFACTURING MAGNETIC RECORDING DISCS
BE798806A (en) ACICULAR FERRIMAGNETIC IRON OXIDE CONTAINING COBALT WHOSE STABILITY OF REMANENCE IS IMPROVED AND PROCESS FOR ITS PREPARATION
IT973717B (en) PROCEDURE FOR THE PRODUCTION OF STABLE AND MAGNETIC ACICULAR IRON PARTICLES
BE798227A (en) MAGNETIC RECORDING MATERIAL AND METHOD OF MANUFACTURING
BE768404A (en) PROCESS FOR PREPARING PIGMENTS OF IRON OXIDE AND HYDRATED DEFER OXIDE
BE745203A (en) PROCESS FOR PREPARING GELS CONTAINING IRON AND MOLYBDENE AND THEIR USES
BE780798A (en) AIR CLEANING PROCESS AND DEVICE
BE798807A (en) ACICULAR FERRIMAGNETIC IRON OXIDE CONTAINING COBALT AND SILICON OXIDE AND PROCESS FOR ITS PREPARATION
FR2537771B1 (en) PROCESS FOR THE PREPARATION OF MAGNETIC IRON OXIDE POWDER CONTAINING COBALT
BE781490A (en) AMYLASE INHIBITOR AND ITS PREPARATION PROCESS
BE788072A (en) MAGNETIC RECORDING SUPPORT AND ITS MANUFACTURING PROCESS
BE815266A (en) PRODUCTION OF ACICULAR FERRIMAGNETIC IRON OXIDES CONTAINING COBALT
BE795902A (en) PROCESS FOR THE PREPARATION OF DIIODO-3,5 HYDROXY-4BENZONITRILE AND IODO-3 HYDROXY-4 NITRO-5BENZONITRILE
BE794526A (en) PROCESS FOR THE BIOHYDROMETALLURGIC EXTRACTION OF COBALT AND NICKEL
BE756143A (en) PROCESS FOR PREPARING IRON OXIDE, ACICULAR OR GOETHITE USED FOR THE PRODUCTION OF MAGNETIC IRON OXIDE FE2O3
BE848026A (en) GAMMA - (III) IRON OXIDE PREPARATION PROCESS
BE848027A (en) GAMMA - (III) IRON OXIDE PREPARATION PROCESS
BE809291A (en) PROCESS FOR THE MANUFACTURING OF HALOGENOPHENOLSULPHONIC COMPOUNDS AND POSSIBLE HALOGENOPHENOLS
BE771273A (en) URANIUM COMPLEXES AND THEIR MANUFACTURING PROCESS

Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: BAYER A.G.

Effective date: 19920430