GB1204991A - Method of preparing a metal powder consisting at least substantially of iron for magnetic recording - Google Patents

Method of preparing a metal powder consisting at least substantially of iron for magnetic recording

Info

Publication number
GB1204991A
GB1204991A GB00765/69A GB1076569A GB1204991A GB 1204991 A GB1204991 A GB 1204991A GB 00765/69 A GB00765/69 A GB 00765/69A GB 1076569 A GB1076569 A GB 1076569A GB 1204991 A GB1204991 A GB 1204991A
Authority
GB
United Kingdom
Prior art keywords
iron
magnetic recording
preparing
metal powder
powder consisting
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
GB00765/69A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1204991A publication Critical patent/GB1204991A/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
    • G11B5/70605—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
    • G11B5/70615—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 Fe metal or alloys
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

1,204,991. Production of iron containing powder. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Feb. 28, 1969 [March 5, 1968], No. 10765/69. Heading C7D. Metallic powder, consisting at least predominantly of iron with optional addition of Ni, Co or both, for use in magnetic recording devices, is produced by the gaseous reduction of metal oxide, hydroxide or both at a temperature not exceeding 300‹C. with a reducing gas pressure of at least 10 atmospheres. The process is preferably carried out in the presence of a water-binding agent (e.g. CaO or P2O5). In examples the reducing gas is hydrogen.
GB00765/69A 1968-03-05 1969-02-28 Method of preparing a metal powder consisting at least substantially of iron for magnetic recording Expired GB1204991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6803123A NL6803123A (en) 1968-03-05 1968-03-05

Publications (1)

Publication Number Publication Date
GB1204991A true GB1204991A (en) 1970-09-09

Family

ID=19802944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB00765/69A Expired GB1204991A (en) 1968-03-05 1969-02-28 Method of preparing a metal powder consisting at least substantially of iron for magnetic recording

Country Status (7)

Country Link
US (1) US3607219A (en)
AT (1) AT306763B (en)
BE (1) BE729304A (en)
CH (1) CH515331A (en)
FR (1) FR2003248A1 (en)
GB (1) GB1204991A (en)
NL (1) NL6803123A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843795A1 (en) * 1977-10-06 1979-04-12 Victor Company Of Japan MAGNETIC IRON POWDER CONTAINING MOLYBDA AND THE PROCESS FOR ITS MANUFACTURING

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922630B1 (en) * 1970-06-23 1974-06-10
US4207092A (en) * 1977-03-03 1980-06-10 E. I. Du Pont De Nemours And Company Acicular α-iron particles, their preparation and recording media employing same
US4310349A (en) * 1979-02-02 1982-01-12 Ampex Corporation Highly orientable iron particles
US4316738A (en) * 1979-02-02 1982-02-23 Ampex Corporation Economical process for producing metal particles for magnetic recording
US4273807A (en) * 1979-03-19 1981-06-16 E. I. Du Pont De Nemours And Company Acicular α-iron particles and recording media employing same
US4318734A (en) * 1980-02-25 1982-03-09 Ampex Corporation Reduction of iron oxide utilizing dehydrating agent
JPS5980901A (en) * 1982-11-01 1984-05-10 Fuji Photo Film Co Ltd Manufacture of ferromagnetic metal powder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3005701A (en) * 1957-10-15 1961-10-24 Bethlehem Steel Corp Method of making melting stock by direct reduction
US3347659A (en) * 1965-05-19 1967-10-17 Hydrocarbon Research Inc Process of reducing iron oxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843795A1 (en) * 1977-10-06 1979-04-12 Victor Company Of Japan MAGNETIC IRON POWDER CONTAINING MOLYBDA AND THE PROCESS FOR ITS MANUFACTURING

Also Published As

Publication number Publication date
DE1906531B2 (en) 1977-01-20
DE1906531A1 (en) 1969-10-02
BE729304A (en) 1969-09-03
NL6803123A (en) 1969-09-09
FR2003248A1 (en) 1969-11-07
US3607219A (en) 1971-09-21
AT306763B (en) 1973-04-25
CH515331A (en) 1971-11-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee