GB2068923B - Process for the preparation of iron compound fine particles for use in magnetic recording - Google Patents

Process for the preparation of iron compound fine particles for use in magnetic recording

Info

Publication number
GB2068923B
GB2068923B GB8103359A GB8103359A GB2068923B GB 2068923 B GB2068923 B GB 2068923B GB 8103359 A GB8103359 A GB 8103359A GB 8103359 A GB8103359 A GB 8103359A GB 2068923 B GB2068923 B GB 2068923B
Authority
GB
United Kingdom
Prior art keywords
preparation
fine particles
magnetic recording
iron compound
compound fine
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
GB8103359A
Other languages
English (en)
Other versions
GB2068923A (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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Publication of GB2068923A publication Critical patent/GB2068923A/en
Application granted granted Critical
Publication of GB2068923B publication Critical patent/GB2068923B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/065—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder obtained by a reduction
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Compounds Of Iron (AREA)
GB8103359A 1980-02-08 1981-02-04 Process for the preparation of iron compound fine particles for use in magnetic recording Expired GB2068923B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1357480A JPS56114833A (en) 1980-02-08 1980-02-08 Production of fine particle of iron compound for magnetic recording

Publications (2)

Publication Number Publication Date
GB2068923A GB2068923A (en) 1981-08-19
GB2068923B true GB2068923B (en) 1984-05-02

Family

ID=11836932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8103359A Expired GB2068923B (en) 1980-02-08 1981-02-04 Process for the preparation of iron compound fine particles for use in magnetic recording

Country Status (3)

Country Link
JP (1) JPS56114833A (enrdf_load_stackoverflow)
DE (1) DE3104214A1 (enrdf_load_stackoverflow)
GB (1) GB2068923B (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55149138A (en) * 1979-05-11 1980-11-20 Tdk Corp Iron oxide hydrate containing silicon and phosphorus, and its manufacture
JPS6265307A (ja) * 1985-09-14 1987-03-24 Mitsui Toatsu Chem Inc 磁性鉄粉の製造方法
DE4213061A1 (de) * 1992-04-21 1993-10-28 Basf Magnetics Gmbh Verfahren zur Herstellung von nadelförmigem Gamma-Eisen(III)oxid
JPH10101339A (ja) * 1996-09-27 1998-04-21 Titan Kogyo Kk マグネタイト粒子粉末及びその製造方法並びにその応用

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE792847A (fr) * 1971-12-17 1973-06-15 Bayer Ag Procede de preparation d'oxydes de fer magnetiques aciculaires
DE2801395C2 (de) * 1978-01-13 1982-04-22 Bayer Ag, 5090 Leverkusen Thermisch stabilisiertes ferrimagnetisches Eisenoxid
DE2909995C2 (de) * 1978-03-16 1984-06-28 Kanto Denka Kogyo Co., Ltd., Tokyo Verfahren zur Herstellung eines Magnetpulvers
DE2815712A1 (de) * 1978-04-12 1979-10-25 Bayer Ag Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung
JPS5613411A (en) * 1979-07-16 1981-02-09 Kawasaki Steel Corp Manufacture of magnetic powder of metallic iron

Also Published As

Publication number Publication date
JPS56114833A (en) 1981-09-09
JPS6313934B2 (enrdf_load_stackoverflow) 1988-03-28
GB2068923A (en) 1981-08-19
DE3104214C2 (enrdf_load_stackoverflow) 1991-07-18
DE3104214A1 (de) 1981-11-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930204