KR900009888A - Method for manufacturing magnetic iron oxide and pigment obtained therefrom - Google Patents

Method for manufacturing magnetic iron oxide and pigment obtained therefrom

Info

Publication number
KR900009888A
KR900009888A KR1019890019226A KR890019226A KR900009888A KR 900009888 A KR900009888 A KR 900009888A KR 1019890019226 A KR1019890019226 A KR 1019890019226A KR 890019226 A KR890019226 A KR 890019226A KR 900009888 A KR900009888 A KR 900009888A
Authority
KR
South Korea
Prior art keywords
iron oxide
magnetic iron
obtained therefrom
pigment obtained
manufacturing magnetic
Prior art date
Application number
KR1019890019226A
Other languages
Korean (ko)
Other versions
KR930004584B1 (en
Inventor
카트라인 헨드릭
키믈레 페테르
Original Assignee
바이엘 아크티엔게젤샤프트
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 바이엘 아크티엔게젤샤프트 filed Critical 바이엘 아크티엔게젤샤프트
Publication of KR900009888A publication Critical patent/KR900009888A/en
Application granted granted Critical
Publication of KR930004584B1 publication Critical patent/KR930004584B1/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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/30—Three-dimensional structures
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)
KR1019890019226A 1988-12-24 1989-12-22 Process for the preparation of magnetic iron oxides and the pigments obtained therefrom KR930004584B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP3843848.8 1988-12-24
DE3843848 1988-12-24
DEP3910782.5 1989-04-04
DE3910782A DE3910782C2 (en) 1988-12-24 1989-04-04 Process for the production of magnetic iron oxides and pigments thus obtained

Publications (2)

Publication Number Publication Date
KR900009888A true KR900009888A (en) 1990-07-05
KR930004584B1 KR930004584B1 (en) 1993-06-01

Family

ID=27634611

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890019226A KR930004584B1 (en) 1988-12-24 1989-12-22 Process for the preparation of magnetic iron oxides and the pigments obtained therefrom

Country Status (2)

Country Link
KR (1) KR930004584B1 (en)
DE (2) DE3910782C2 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4810994B1 (en) * 1969-07-26 1973-04-09
DE2235383C3 (en) * 1971-07-19 1986-10-23 Hitachi Maxell, Ltd., Ibaraki, Osaka Process for producing ferromagnetic acicular particles for a recording system
DE2243231C2 (en) * 1972-09-01 1982-01-28 Basf Ag, 6700 Ludwigshafen Process for the preparation of cobalt-doped γ-iron (III) oxide
JPS5321118B2 (en) * 1973-03-05 1978-06-30
DE2903593C3 (en) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Cobalt-doped ferrimagnetic iron oxides and processes for their production
JPS5659629A (en) * 1979-10-15 1981-05-23 Tdk Corp Manufacture of high coercive force magnetic powder
US4457955A (en) * 1981-12-29 1984-07-03 Daikin Kogyo Company, Ltd. Process for producing magnetizable particles
AU558199B2 (en) * 1982-09-16 1987-01-22 Ishihara Sangyo Kaisha Ltd. Production of magnetic powder
JPS59107924A (en) * 1982-12-08 1984-06-22 Ishihara Sangyo Kaisha Ltd Manufacture of magnetic iron oxide powder containing cobalt
US4664947A (en) * 1984-06-08 1987-05-12 Tandy Corporation Multi-layer process for cobalt treatment of ferromagnetic oxides
DE3438093A1 (en) * 1984-10-18 1986-04-24 Basf Ag, 6700 Ludwigshafen FERRIMAGNETIC PARTICLES AND METHOD FOR THEIR PRODUCTION
DE3631193A1 (en) * 1986-09-13 1988-03-24 Bayer Ag MAGNETIC IRON OXIDE PIGMENTS AND METHOD FOR THE PRODUCTION THEREOF

Also Published As

Publication number Publication date
KR930004584B1 (en) 1993-06-01
DE3910782A1 (en) 1990-07-05
DE3910782C2 (en) 2003-08-28
DE58903353D1 (en) 1993-03-04

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Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20030521

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee