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GB1125093A - Production of magnetizable metallic particles suitable for the production of magnetic recording media - Google Patents

Production of magnetizable metallic particles suitable for the production of magnetic recording media

Info

Publication number
GB1125093A
GB1125093A GB777/66A GB77766A GB1125093A GB 1125093 A GB1125093 A GB 1125093A GB 777/66 A GB777/66 A GB 777/66A GB 77766 A GB77766 A GB 77766A GB 1125093 A GB1125093 A GB 1125093A
Authority
GB
United Kingdom
Prior art keywords
production
salt
magnetic recording
recording media
metallic particles
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
GB777/66A
Inventor
Hans-Joerg Hartmann
Karl Wintersberger
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
Badische Anilin and Sodafabrik AG
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, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1125093A publication Critical patent/GB1125093A/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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/656—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Co
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2666—Other ferrites containing nickel, copper or cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • 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
    • 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
    • G11B5/70605—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 metals or alloys
    • G11B5/70621—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 metals or alloys containing Co metal or alloys

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Structural Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)

Abstract

1,125,093. Cobalt ferrite. BADISCHE ANILIN- & SODA-FABRIK. A.G. 7 Jan., 1966 [9 Jan., 1965], No. 777/66. Heading C1A. [Also in Divisions C7 and H1] Cobalt ferrite is produced by adding to a solution containing a Co II salt and an Fe III salt (with an atomic ratio of Co II : Fe III of 0À8 : 2 to 1À8 : 2) a caustic alkali solution in such an amount that the pH reaches at least 12À8, heating the resultant precipitate to above 50‹ C., and separating and drying the precipitate. Up to 80% of the Co II salt may be replaced by Fe II salt. The caustic alkali may be added to Fe III salt solution alone, the Co II salt being added when the neutral point has been reached. The caustic alkali is preferably added in stages and preneutralisation with ammonia may be employed.
GB777/66A 1965-01-09 1966-01-07 Production of magnetizable metallic particles suitable for the production of magnetic recording media Expired GB1125093A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB80058A DE1247026B (en) 1965-01-09 1965-01-09 Process for the production of magnetizable metallic particles suitable for the production of magnetogram carriers

Publications (1)

Publication Number Publication Date
GB1125093A true GB1125093A (en) 1968-08-28

Family

ID=6980566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB777/66A Expired GB1125093A (en) 1965-01-09 1966-01-07 Production of magnetizable metallic particles suitable for the production of magnetic recording media

Country Status (5)

Country Link
BE (1) BE674825A (en)
DE (1) DE1247026B (en)
FR (1) FR1462867A (en)
GB (1) GB1125093A (en)
NL (1) NL145981B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274865A (en) 1978-03-16 1981-06-23 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4305753A (en) 1980-07-31 1981-12-15 Hercules Incorporated Process for producing ferromagnetic metallic particles
US4306921A (en) 1978-03-16 1981-12-22 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4328282A (en) 1980-02-11 1982-05-04 Basf Aktiengesellschaft Magnetic recording media

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235383C3 (en) * 1971-07-19 1986-10-23 Hitachi Maxell, Ltd., Ibaraki, Osaka Process for producing ferromagnetic acicular particles for a recording system
JPS5529577B2 (en) * 1972-02-04 1980-08-05
JPS6044805B2 (en) * 1976-08-27 1985-10-05 日本ビクター株式会社 Method for manufacturing magnetic recording media
DE2909995C2 (en) * 1978-03-16 1984-06-28 Kanto Denka Kogyo Co., Ltd., Tokyo Method for producing a magnetic powder
US4218240A (en) * 1979-05-14 1980-08-19 Gte Products Corporation Method for producing cobaltic hexammine compounds and cobalt metal powder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274865A (en) 1978-03-16 1981-06-23 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4306921A (en) 1978-03-16 1981-12-22 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4384892A (en) 1978-03-16 1983-05-24 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4404024A (en) 1978-03-16 1983-09-13 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4447264A (en) * 1978-03-16 1984-05-08 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4328282A (en) 1980-02-11 1982-05-04 Basf Aktiengesellschaft Magnetic recording media
US4305753A (en) 1980-07-31 1981-12-15 Hercules Incorporated Process for producing ferromagnetic metallic particles
DE3130425A1 (en) * 1980-07-31 1982-06-16 Hercules Inc., 19899 Wilmington, Del. METHOD FOR PRODUCING NEEDLE (CRYSTAL) SHAPED, FERROMAGNETIC METAL PARTICLES FOR MAGNETIC RECORDING MEDIA

Also Published As

Publication number Publication date
NL145981B (en) 1975-05-15
DE1247026B (en) 1967-08-10
NL6600221A (en) 1966-07-11
BE674825A (en) 1966-07-07
FR1462867A (en) 1966-12-16

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