CA1056150A - Magnetic fe oxide and process for producing the same - Google Patents

Magnetic fe oxide and process for producing the same

Info

Publication number
CA1056150A
CA1056150A CA221,442A CA221442A CA1056150A CA 1056150 A CA1056150 A CA 1056150A CA 221442 A CA221442 A CA 221442A CA 1056150 A CA1056150 A CA 1056150A
Authority
CA
Canada
Prior art keywords
magnetic
oxide
divalent metal
magnetite
oxidation degree
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
CA221,442A
Other languages
English (en)
French (fr)
Other versions
CA221442S (en
Inventor
Koji Sasazawa
Mahito Shimizu
Tatsuji Kitamoto
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of CA1056150A publication Critical patent/CA1056150A/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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70689—Magnetite
    • 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

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
CA221,442A 1974-03-12 1975-03-04 Magnetic fe oxide and process for producing the same Expired CA1056150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP49028423A JPS5941289B2 (ja) 1974-03-12 1974-03-12 磁性酸化鉄の製造方法

Publications (1)

Publication Number Publication Date
CA1056150A true CA1056150A (en) 1979-06-12

Family

ID=12248237

Family Applications (1)

Application Number Title Priority Date Filing Date
CA221,442A Expired CA1056150A (en) 1974-03-12 1975-03-04 Magnetic fe oxide and process for producing the same

Country Status (3)

Country Link
JP (1) JPS5941289B2 (enrdf_load_stackoverflow)
CA (1) CA1056150A (enrdf_load_stackoverflow)
DE (1) DE2510799A1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276183A (en) * 1978-10-25 1981-06-30 Pfizer Inc. Cobalt modified magnetic iron oxide
JPS56107506A (en) * 1980-01-30 1981-08-26 Anelva Corp Magnetic thin-film
JPS5860630A (ja) * 1981-10-07 1983-04-11 Ishihara Sangyo Kaisha Ltd コバルト含有強磁性酸化鉄の製造方法
JPS5888122A (ja) * 1981-11-20 1983-05-26 Ishihara Sangyo Kaisha Ltd コバルト含有強磁性酸化鉄の製造方法
JPS5832027A (ja) * 1981-07-28 1983-02-24 Ishihara Sangyo Kaisha Ltd コバルト含有酸化鉄強磁性粉末の製造方法
MY107614A (en) * 1990-09-26 1996-05-15 Ishihara Sangyo Kaisha Acicular ferromagnetic iron oxide particles and process for producing the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790376A (fr) * 1971-10-27 1973-02-15 Ampex Particules d'oxyde de fer magnétique dopé au cobalt
BE792847A (fr) * 1971-12-17 1973-06-15 Bayer Ag Procede de preparation d'oxydes de fer magnetiques aciculaires
JPS5529577B2 (enrdf_load_stackoverflow) * 1972-02-04 1980-08-05

Also Published As

Publication number Publication date
DE2510799A1 (de) 1975-09-18
JPS5941289B2 (ja) 1984-10-05
JPS50119997A (enrdf_load_stackoverflow) 1975-09-19

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