ES373717A1 - Process for preparing supported permanently-magnetizable metals or alloys - Google Patents

Process for preparing supported permanently-magnetizable metals or alloys

Info

Publication number
ES373717A1
ES373717A1 ES373717A ES373717A ES373717A1 ES 373717 A1 ES373717 A1 ES 373717A1 ES 373717 A ES373717 A ES 373717A ES 373717 A ES373717 A ES 373717A ES 373717 A1 ES373717 A1 ES 373717A1
Authority
ES
Spain
Prior art keywords
precipitate
solution
carrier
alloy
metal
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
ES373717A
Other languages
Spanish (es)
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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
Priority claimed from NL6800237A external-priority patent/NL6800237A/xx
Priority claimed from NL6804970A external-priority patent/NL6804970A/xx
Priority claimed from NL6804971A external-priority patent/NL6804971A/xx
Priority claimed from NL6816682A external-priority patent/NL6816682A/en
Priority claimed from NL6818247A external-priority patent/NL6818247A/en
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Publication of ES373717A1 publication Critical patent/ES373717A1/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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8416—Processes or apparatus specially adapted for manufacturing record carriers coating a support with a magnetic layer by precipitation
    • 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
    • G11B5/7061—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 with a non-magnetic core
    • 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
    • H01F1/063—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 with a non magnetic core
    • 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
    • H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/111—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles with a non-magnetic core

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Soft Magnetic Materials (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Silicon Compounds (AREA)

Abstract

Supported permanently magnetizable metal (s) or alloy(s) are produced by suspending a finelydivided carrier material in a solution containing the metal ions and gradually generating OH1 ions homogeneously in the solution at a sufficient rate to deposit the active element(s) on the carrier but not fast enough to get nucleation of the pure precipitate in the solution, the precipitate being hydroxide or hydrated oxide, removing the carrier from the solution and then reducing the precipitate to give metal or alloy particles of size in the single-domain range. The reduction may be by means of hydrogen, optionally in the presence of water vapour, or by hydrazine and the precipitate may be calcined in air before reduction. The loaded carrier materials may be impregnated under vacuum with a polymerizable monomer or molten polymer for application to tapes or for the production of sheets or moulded bodies to form magnetic recording material. The examples refer to the deposition of Fe or Ni- Co alloy on SiO 2 particles.
ES373717A 1968-01-06 1969-11-20 Process for preparing supported permanently-magnetizable metals or alloys Expired ES373717A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
NL6800237A NL6800237A (en) 1968-01-06 1968-01-06
NL6804970A NL6804970A (en) 1968-04-09 1968-04-09
NL6804971A NL6804971A (en) 1968-04-09 1968-04-09
NL6816682A NL6816682A (en) 1968-11-21 1968-11-21 Permanently magnetisable substance
NL6818247A NL6818247A (en) 1968-12-19 1968-12-19 Ferromagnetic material prepn.

Publications (1)

Publication Number Publication Date
ES373717A1 true ES373717A1 (en) 1972-04-16

Family

ID=27532474

Family Applications (2)

Application Number Title Priority Date Filing Date
ES373717A Expired ES373717A1 (en) 1968-01-06 1969-11-20 Process for preparing supported permanently-magnetizable metals or alloys
ES374722A Expired ES374722A2 (en) 1968-01-06 1969-12-19 Process for preparing supported permanently-magnetizable metals or alloys

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES374722A Expired ES374722A2 (en) 1968-01-06 1969-12-19 Process for preparing supported permanently-magnetizable metals or alloys

Country Status (10)

Country Link
JP (2) JPS4912959B1 (en)
AT (2) AT295175B (en)
BE (3) BE731186A (en)
CH (2) CH546712A (en)
DE (3) DE1917644A1 (en)
DK (1) DK134932B (en)
ES (2) ES373717A1 (en)
FR (3) FR2005878A1 (en)
GB (3) GB1261399A (en)
SE (2) SE352767B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4687372A (en) * 1971-09-21 1974-03-28 Union Carbide Corp Thermosetting arylimides
NL7708959A (en) * 1977-08-15 1979-02-19 Philips Nv PROCEDURE FOR FORMING A MAGNETO-OPTIC POLYCRYSTALLINE COBALT FERRITE LAYER AND COBALT FERRITE LAYER MANUFACTURED BY THE PROCESS.
JPS59111929A (en) * 1982-12-15 1984-06-28 Masanori Abe Preparation of ferrite film
JPS6310163A (en) * 1986-06-30 1988-01-16 Nippon Paint Co Ltd Toner coated with magnetic material

Also Published As

Publication number Publication date
GB1261399A (en) 1972-01-26
DE1958606B2 (en) 1978-07-20
FR2026578A6 (en) 1970-09-18
JPS526958B1 (en) 1977-02-25
BE731186A (en) 1969-10-08
SE352978B (en) 1973-01-15
GB1291064A (en) 1972-09-27
GB1295440A (en) 1972-11-08
AT295175B (en) 1971-12-27
CH546712A (en) 1974-03-15
CH558980A (en) 1975-02-14
DK134932C (en) 1977-07-04
BE743394A (en) 1970-06-19
FR2005878A1 (en) 1969-12-19
DK134932B (en) 1977-02-14
SE352767B (en) 1973-01-08
JPS4912959B1 (en) 1974-03-28
DE1963828A1 (en) 1970-10-08
DE1958606C3 (en) 1979-04-19
ES374722A2 (en) 1972-04-01
BE742017A (en) 1970-05-21
AT297660B (en) 1972-04-10
DE1958606A1 (en) 1970-06-18
FR2030660A5 (en) 1970-11-13
DE1917644A1 (en) 1970-09-10

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