JPS50154198A - - Google Patents

Info

Publication number
JPS50154198A
JPS50154198A JP50054192A JP5419275A JPS50154198A JP S50154198 A JPS50154198 A JP S50154198A JP 50054192 A JP50054192 A JP 50054192A JP 5419275 A JP5419275 A JP 5419275A JP S50154198 A JPS50154198 A JP S50154198A
Authority
JP
Japan
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.)
Granted
Application number
JP50054192A
Other languages
Japanese (ja)
Other versions
JPS537320B2 (nl
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 filed Critical
Publication of JPS50154198A publication Critical patent/JPS50154198A/ja
Publication of JPS537320B2 publication Critical patent/JPS537320B2/ja
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
    • 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]
    • 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
    • C01P2002/54—Solid solutions containing elements as dopants one element only
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
JP5419275A 1974-05-06 1975-05-06 Expired JPS537320B2 (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46745974A 1974-05-06 1974-05-06

Publications (2)

Publication Number Publication Date
JPS50154198A true JPS50154198A (nl) 1975-12-11
JPS537320B2 JPS537320B2 (nl) 1978-03-16

Family

ID=23855785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5419275A Expired JPS537320B2 (nl) 1974-05-06 1975-05-06

Country Status (6)

Country Link
JP (1) JPS537320B2 (nl)
CH (1) CH605414A5 (nl)
DE (1) DE2520379C3 (nl)
GB (1) GB1482157A (nl)
NL (1) NL166244C (nl)
SE (1) SE7505137L (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5118899A (nl) * 1974-08-08 1976-02-14 Fuji Photo Film Co Ltd
JPS5123697A (nl) * 1974-08-20 1976-02-25 Hitachi Maxell

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2556406A1 (de) * 1975-12-15 1977-06-16 Bayer Ag Verfahren zur kontinuierlichen herstellung von eisenoxidhydroxid
DE2705967C2 (de) * 1977-02-12 1990-01-04 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
DE2801395C2 (de) * 1978-01-13 1982-04-22 Bayer Ag, 5090 Leverkusen Thermisch stabilisiertes ferrimagnetisches Eisenoxid
JPS5852806A (ja) * 1981-09-24 1983-03-29 Hitachi Maxell Ltd 磁気記録媒体

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854497A (nl) * 1971-11-10 1973-07-31

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226997B (de) * 1959-06-12 1966-10-20 Bayer Ag Verfahren zur Herstellung von nadelfoermigem, cobalthaltigem gamma-Eisen(III)-oxid
US3573980A (en) * 1968-02-19 1971-04-06 Minnesota Mining & Mfg Method of making magnetic particles and recording tape
JPS4810994B1 (nl) * 1969-07-26 1973-04-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854497A (nl) * 1971-11-10 1973-07-31

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5118899A (nl) * 1974-08-08 1976-02-14 Fuji Photo Film Co Ltd
JPS5942441B2 (ja) * 1974-08-08 1984-10-15 富士写真フイルム株式会社 磁性酸化鉄の製法
JPS5123697A (nl) * 1974-08-20 1976-02-25 Hitachi Maxell
JPS5850005B2 (ja) * 1974-08-20 1983-11-08 日立マクセル株式会社 ジキキロクヨウジセイフンマツノ セイゾウホウ

Also Published As

Publication number Publication date
JPS537320B2 (nl) 1978-03-16
SE7505137L (sv) 1975-11-07
DE2520379A1 (de) 1975-11-13
DE2520379C3 (de) 1981-11-19
GB1482157A (en) 1977-08-10
NL7505145A (nl) 1975-11-10
NL166244C (nl) 1981-07-15
CH605414A5 (nl) 1978-09-29
NL166244B (nl) 1981-02-16
DE2520379B2 (de) 1980-09-25

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