JPS4882395A - - Google Patents

Info

Publication number
JPS4882395A
JPS4882395A JP47012945A JP1294572A JPS4882395A JP S4882395 A JPS4882395 A JP S4882395A JP 47012945 A JP47012945 A JP 47012945A JP 1294572 A JP1294572 A JP 1294572A JP S4882395 A JPS4882395 A JP S4882395A
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
JP47012945A
Other languages
Japanese (ja)
Other versions
JPS5529577B2 (enrdf_load_stackoverflow
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
Priority to JP1294572A priority Critical patent/JPS5529577B2/ja
Priority to GB479473A priority patent/GB1418733A/en
Priority to DE19732305153 priority patent/DE2305153A1/de
Priority to IT1998973A priority patent/IT978774B/it
Priority to NL7301614A priority patent/NL7301614A/xx
Priority to FR7304009A priority patent/FR2170278B1/fr
Publication of JPS4882395A publication Critical patent/JPS4882395A/ja
Publication of JPS5529577B2 publication Critical patent/JPS5529577B2/ja
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
    • 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]
    • 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
    • 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
    • C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • 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)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Compounds Of Iron (AREA)
JP1294572A 1972-02-04 1972-02-04 Expired JPS5529577B2 (enrdf_load_stackoverflow)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP1294572A JPS5529577B2 (enrdf_load_stackoverflow) 1972-02-04 1972-02-04
GB479473A GB1418733A (en) 1972-02-04 1973-01-31 Methods of making acicular magnetic powders pneumatic tyres
DE19732305153 DE2305153A1 (de) 1972-02-04 1973-02-02 Verfahren zur herstellung eines nadelfoermigen magnetischen puders fuer die herstellung von magnetbaendern
IT1998973A IT978774B (it) 1972-02-04 1973-02-02 Metodo per la produzione di goethite in forma aciculare
NL7301614A NL7301614A (enrdf_load_stackoverflow) 1972-02-04 1973-02-05
FR7304009A FR2170278B1 (enrdf_load_stackoverflow) 1972-02-04 1973-02-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1294572A JPS5529577B2 (enrdf_load_stackoverflow) 1972-02-04 1972-02-04

Publications (2)

Publication Number Publication Date
JPS4882395A true JPS4882395A (enrdf_load_stackoverflow) 1973-11-02
JPS5529577B2 JPS5529577B2 (enrdf_load_stackoverflow) 1980-08-05

Family

ID=11819406

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1294572A Expired JPS5529577B2 (enrdf_load_stackoverflow) 1972-02-04 1972-02-04

Country Status (6)

Country Link
JP (1) JPS5529577B2 (enrdf_load_stackoverflow)
DE (1) DE2305153A1 (enrdf_load_stackoverflow)
FR (1) FR2170278B1 (enrdf_load_stackoverflow)
GB (1) GB1418733A (enrdf_load_stackoverflow)
IT (1) IT978774B (enrdf_load_stackoverflow)
NL (1) NL7301614A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310100A (en) * 1976-07-15 1978-01-30 Hitachi Maxell Method of manufacturing ferromagnetic metal powder
JPS53127400A (en) * 1977-04-13 1978-11-07 Nippon Telegr & Teleph Corp <Ntt> Production of goethite
JPS5562105A (en) * 1978-10-30 1980-05-10 Hitachi Maxell Ltd Production of magnetic alloy powder
JPS5571002A (en) * 1978-11-24 1980-05-28 Hitachi Ltd Manufacture of magnetic powder for magnetic recording medium
JPS5573803A (en) * 1978-11-25 1980-06-03 Hitachi Maxell Ltd Production of magnetic alloy powder
JPS583250A (ja) * 1981-06-30 1983-01-10 Toshiba Corp 半導体装置の製造方法
JPS62127577U (enrdf_load_stackoverflow) * 1986-02-06 1987-08-13
JPH01257309A (ja) * 1988-04-07 1989-10-13 Tdk Corp 磁気記録媒体用磁性粉末とその製造方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941289B2 (ja) * 1974-03-12 1984-10-05 富士写真フイルム株式会社 磁性酸化鉄の製造方法
JPS6044805B2 (ja) * 1976-08-27 1985-10-05 日本ビクター株式会社 磁気記録媒体の製造方法
AU548794B2 (en) 1981-07-28 1986-01-02 Ishihara Sangyo Kaisha Ltd. Process for producing cobalt containing ferromagnetic iron oxides
JPS5869964U (ja) * 1981-11-06 1983-05-12 日本電気株式会社 太陽電池パネル

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1212126A (en) * 1967-08-07 1970-11-11 Toda Kogyo Kabushiki Kaisha A METHOD OF MANUFACTURING gamma-Fe2O3 PARTICLES

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117933A (en) * 1959-06-12 1964-01-14 Bayer Ag Process for the production of needleshaped, cobalt-containing gamma-ferric oxide crystalline particles
DE1247026B (de) * 1965-01-09 1967-08-10 Basf Ag Verfahren zur Herstellung von fuer die Herstellung von Magnetogrammtraegern geeigneten, magnetisierbaren metallischen Teilchen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1212126A (en) * 1967-08-07 1970-11-11 Toda Kogyo Kabushiki Kaisha A METHOD OF MANUFACTURING gamma-Fe2O3 PARTICLES

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310100A (en) * 1976-07-15 1978-01-30 Hitachi Maxell Method of manufacturing ferromagnetic metal powder
JPS53127400A (en) * 1977-04-13 1978-11-07 Nippon Telegr & Teleph Corp <Ntt> Production of goethite
JPS5562105A (en) * 1978-10-30 1980-05-10 Hitachi Maxell Ltd Production of magnetic alloy powder
JPS5571002A (en) * 1978-11-24 1980-05-28 Hitachi Ltd Manufacture of magnetic powder for magnetic recording medium
JPS5573803A (en) * 1978-11-25 1980-06-03 Hitachi Maxell Ltd Production of magnetic alloy powder
JPS583250A (ja) * 1981-06-30 1983-01-10 Toshiba Corp 半導体装置の製造方法
JPS62127577U (enrdf_load_stackoverflow) * 1986-02-06 1987-08-13
JPH01257309A (ja) * 1988-04-07 1989-10-13 Tdk Corp 磁気記録媒体用磁性粉末とその製造方法

Also Published As

Publication number Publication date
IT978774B (it) 1974-09-20
DE2305153A1 (de) 1973-08-16
GB1418733A (en) 1975-12-24
JPS5529577B2 (enrdf_load_stackoverflow) 1980-08-05
FR2170278B1 (enrdf_load_stackoverflow) 1978-04-21
FR2170278A1 (enrdf_load_stackoverflow) 1973-09-14
NL7301614A (enrdf_load_stackoverflow) 1973-08-07

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