CA1064223A - Method of making goethite powder - Google Patents

Method of making goethite powder

Info

Publication number
CA1064223A
CA1064223A CA182,127A CA182127A CA1064223A CA 1064223 A CA1064223 A CA 1064223A CA 182127 A CA182127 A CA 182127A CA 1064223 A CA1064223 A CA 1064223A
Authority
CA
Canada
Prior art keywords
ferrous
hydroxide
powder
goethite
mixing
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.)
Expired
Application number
CA182,127A
Other languages
English (en)
French (fr)
Inventor
Tokio Nakamura
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of CA1064223A publication Critical patent/CA1064223A/en
Expired legal-status Critical Current

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
    • 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
    • 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
    • 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
    • C01P2004/60—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
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
CA182,127A 1972-09-30 1973-09-28 Method of making goethite powder Expired CA1064223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47098511A JPS5221720B2 (US06633782-20031014-M00005.png) 1972-09-30 1972-09-30

Publications (1)

Publication Number Publication Date
CA1064223A true CA1064223A (en) 1979-10-16

Family

ID=14221659

Family Applications (1)

Application Number Title Priority Date Filing Date
CA182,127A Expired CA1064223A (en) 1972-09-30 1973-09-28 Method of making goethite powder

Country Status (4)

Country Link
JP (1) JPS5221720B2 (US06633782-20031014-M00005.png)
CA (1) CA1064223A (US06633782-20031014-M00005.png)
DE (1) DE2349112A1 (US06633782-20031014-M00005.png)
GB (1) GB1437409A (US06633782-20031014-M00005.png)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53127400A (en) * 1977-04-13 1978-11-07 Nippon Telegr & Teleph Corp <Ntt> Production of goethite
JPS54110999A (en) * 1978-02-20 1979-08-30 Nippon Telegr & Teleph Corp <Ntt> Preparation of magnetic particulates
CH637212A5 (fr) * 1980-04-29 1983-07-15 Schweizerische Beratungsstelle Appareil de reglage d'une fixation de securite montee sur un ski.

Also Published As

Publication number Publication date
JPS4957397A (US06633782-20031014-M00005.png) 1974-06-04
DE2349112A1 (de) 1974-04-04
GB1437409A (en) 1976-05-26
JPS5221720B2 (US06633782-20031014-M00005.png) 1977-06-13

Similar Documents

Publication Publication Date Title
US3865627A (en) Magnetic recording medium incorporating fine acicular iron-based particles
CA1115511A (en) Process for producing cobalt-containing ferromagnetic iron oxide powder
US4447264A (en) Production of magnetic powder
US4297395A (en) Production of cobalt-doped ferrimagnetic iron oxides
JPH0448732B2 (US06633782-20031014-M00005.png)
US4178171A (en) Manufacture of acicular ferromagnetic iron particles
US3897354A (en) Cobalt-containing acicular ferrimagnetic iron oxide of improved remanence stability
CA1064223A (en) Method of making goethite powder
US4071610A (en) Manufacture of gamma-iron(III) oxide
US4631090A (en) Preparation and use of iron magnetic pigments
US4865834A (en) Process for producing plate-like magnetite particles and plate-like maghemite particles
US4059716A (en) Manufacture of gamma-iron(III) oxide
JPH0145202B2 (US06633782-20031014-M00005.png)
US4060596A (en) Method of making goethite powder
US4594267A (en) Process for producing cobalt-containing magnetic iron oxide powder
US4010310A (en) Magnetic powder
CA1132790A (en) Cobalt modified magnetic iron oxide
US4061726A (en) Manufacture of acicular γ-iron(III) oxide
US4061725A (en) Manufacture of gamma-iron(III) oxide
US4086174A (en) Cobalt modified acicular γ ferric oxide and process for preparing the same
CA1132008A (en) Metallic iron particles for magnetic recording produced by reducing an iron oxide precursor coated with an antimony compound
US4990182A (en) Carbon-containing magnetic metal powder
US4437881A (en) Acicular ferromagnetic alloy particles and process for producing said particles
US4650597A (en) Preparation of finely divided isotropic cobalt-containing ferrite powder
US4305752A (en) Metallic iron particles for magnetic recording