JPS5330497A - Cobalttdoped acicular magnetic iron oxide and process for preparing same - Google Patents

Cobalttdoped acicular magnetic iron oxide and process for preparing same

Info

Publication number
JPS5330497A
JPS5330497A JP10275477A JP10275477A JPS5330497A JP S5330497 A JPS5330497 A JP S5330497A JP 10275477 A JP10275477 A JP 10275477A JP 10275477 A JP10275477 A JP 10275477A JP S5330497 A JPS5330497 A JP S5330497A
Authority
JP
Japan
Prior art keywords
cobalttdoped
iron oxide
magnetic iron
preparing same
acicular magnetic
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.)
Pending
Application number
JP10275477A
Other languages
Japanese (ja)
Inventor
Yurugen Betsukeru Hansu
Kesuteru Eeberuharuto
Ooringeru Manfureeto
Shiyutetsuku Ueruneru
Shienafuingeru Ezuaruto
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of JPS5330497A publication Critical patent/JPS5330497A/en
Pending 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
JP10275477A 1976-09-01 1977-08-29 Cobalttdoped acicular magnetic iron oxide and process for preparing same Pending JPS5330497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762639250 DE2639250C2 (en) 1976-09-01 1976-09-01 Process for the production of acicular, cobalt-doped magnetic iron oxide

Publications (1)

Publication Number Publication Date
JPS5330497A true JPS5330497A (en) 1978-03-22

Family

ID=5986842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10275477A Pending JPS5330497A (en) 1976-09-01 1977-08-29 Cobalttdoped acicular magnetic iron oxide and process for preparing same

Country Status (6)

Country Link
JP (1) JPS5330497A (en)
BE (1) BE858222A (en)
DE (1) DE2639250C2 (en)
FR (1) FR2363521A1 (en)
GB (1) GB1583256A (en)
NL (1) NL7709413A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413997A (en) * 1977-07-04 1979-02-01 Sony Corp Magnetic recording medium and its manufacture
JPS589453B1 (en) * 1978-03-17 1983-02-21 Burroughs Corp
JPS5864221A (en) * 1981-10-09 1983-04-16 Ishihara Sangyo Kaisha Ltd Manufacture of ferromagnetic iron oxide coated with cobalt
JPS5922262B1 (en) * 1969-05-19 1984-05-25 Burroughs Corp
JPS6117221A (en) * 1984-06-25 1986-01-25 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH02283623A (en) * 1989-03-15 1990-11-21 Bayer Ag Co-bearing magnetic pigment, its production method and usage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1603213A (en) * 1977-04-20 1981-11-18 Hitachi Maxell Cobalt containing iron oxide magnetic particles and method for the preparation of the same
US4209412A (en) * 1978-05-22 1980-06-24 Hercules Incorporated Process for producing nonstoichiometric ferroso-ferric oxides
DE3413752A1 (en) * 1984-04-12 1985-10-24 Basf Ag, 6700 Ludwigshafen METHOD FOR PRODUCING ISOTROPIC MAGNETIC, COBAL-CONTAINING IRON OXIDS
DE3631193A1 (en) * 1986-09-13 1988-03-24 Bayer Ag MAGNETIC IRON OXIDE PIGMENTS AND METHOD FOR THE PRODUCTION THEREOF
DE4319572A1 (en) * 1993-06-14 1994-12-15 Toda Kogyo Corp Co-containing iron oxide pigments, processes for their preparation and magnetic media containing them

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262812A (en) * 1964-03-26 1966-07-26 Gen Electric Magnetic recording tape with magnetic layer of oxide coated iron-cobalt alloy particles in a binder
US3573980A (en) * 1968-02-19 1971-04-06 Minnesota Mining & Mfg Method of making magnetic particles and recording tape
GB1268458A (en) * 1969-05-07 1972-03-29 Ampex Improvements in and relating to the preparation of cobalt doped gamma ferric oxide
BE790376A (en) * 1971-10-27 1973-02-15 Ampex Cobalt doped magnetic iron oxide particles
NL180000C (en) * 1972-04-21 1986-12-16 Anvar PROCESS FOR THE PREPARATION OF A FINISHED POWDER FROM A SOLID SOLUTION OF GAMMA-FEŸ2OŸ3 SUBSTITUTED WITH ONE OR MORE TWO-VALUE METALS.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922262B1 (en) * 1969-05-19 1984-05-25 Burroughs Corp
JPS5413997A (en) * 1977-07-04 1979-02-01 Sony Corp Magnetic recording medium and its manufacture
JPS6114642B2 (en) * 1977-07-04 1986-04-19 Sony Corp
JPS589453B1 (en) * 1978-03-17 1983-02-21 Burroughs Corp
JPS5864221A (en) * 1981-10-09 1983-04-16 Ishihara Sangyo Kaisha Ltd Manufacture of ferromagnetic iron oxide coated with cobalt
JPS6138129B2 (en) * 1981-10-09 1986-08-27 Ishihara Sangyo Kaisha
JPS6117221A (en) * 1984-06-25 1986-01-25 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH0576691B2 (en) * 1984-06-25 1993-10-25 Konishiroku Photo Ind
JPH02283623A (en) * 1989-03-15 1990-11-21 Bayer Ag Co-bearing magnetic pigment, its production method and usage

Also Published As

Publication number Publication date
GB1583256A (en) 1981-01-21
DE2639250C2 (en) 1985-12-12
DE2639250A1 (en) 1978-03-09
NL7709413A (en) 1978-03-03
FR2363521B1 (en) 1981-08-21
FR2363521A1 (en) 1978-03-31
BE858222A (en) 1978-02-28

Similar Documents

Publication Publication Date Title
DE3068158D1 (en) Magnetic recording carrier and process for its manufacture
JPS51124410A (en) Magnetic reader
JPS55141712A (en) Acicular magnetic iron oxide and method for producing same
DE3063007D1 (en) Method of preparing acicular magnetic cobalt containing iron oxide
DE3061081D1 (en) Cobalt-doped ferrimagnetic iron oxides and process for producing them
DE3063008D1 (en) Method for the preparation of acicular magnetic cobalt containing iron oxide
JPS536007A (en) Magnetic tape recorder and improvement thereof
JPS5319998A (en) Process for preparing cobalttdoped acicular magnetite particle having magnetic stability
JPS53100197A (en) Method of making acicular cobaltt containing magnetic iron oxide
JPS5330497A (en) Cobalttdoped acicular magnetic iron oxide and process for preparing same
JPS5428299A (en) Method of making acicular ferric magnetic iron oxide
JPS5257095A (en) Magnetic oxides and process for preparing same
DE3065058D1 (en) Process for preparing ferromagnetic acicular iron particles, and their use
JPS5358497A (en) Cobalttdoped acicular magnetic iron oxide and process for preparing same
JPS5376957A (en) Magnetic metal iron powder and said manufacturing process
DE3067268D1 (en) Process for preparing acicular ferromagnetic iron particles, and their use
JPS52135895A (en) Process for preparing cobaltt modified acicular crystal magnetic ironoxide particle
JPS53139518A (en) Magnetic tape and making method thereof
GB2033886B (en) Cobalt magnetic iron oxide
JPS51146211A (en) Magnetic tape reader
JPS5437297A (en) Method of making acicular magnetic iron oxide particulates for magnetic recording material
JPS5376958A (en) Metal magnetic powder and said manufacturing process
JPS5376198A (en) Method of making particulates of acicular magnetic iron oxide
JPS52135897A (en) Process for preparing cobaltt modified acicular crystal magnetic ironoxide particle
JPS52114499A (en) Cobalttdoped acicular gammaa ferric oxide crystal process for preparing same and magnetic tape