FR2420193A1 - Production de poudre magnetique - Google Patents

Production de poudre magnetique

Info

Publication number
FR2420193A1
FR2420193A1 FR7906603A FR7906603A FR2420193A1 FR 2420193 A1 FR2420193 A1 FR 2420193A1 FR 7906603 A FR7906603 A FR 7906603A FR 7906603 A FR7906603 A FR 7906603A FR 2420193 A1 FR2420193 A1 FR 2420193A1
Authority
FR
France
Prior art keywords
iron
magnetic powder
mixtures
raw material
group
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.)
Granted
Application number
FR7906603A
Other languages
English (en)
Other versions
FR2420193B1 (fr
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.)
Kanto Denka Kogyo Co Ltd
Original Assignee
Kanto Denka Kogyo Co 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
Priority claimed from JP3015178A external-priority patent/JPS54122664A/ja
Priority claimed from JP3015078A external-priority patent/JPS54122663A/ja
Application filed by Kanto Denka Kogyo Co Ltd filed Critical Kanto Denka Kogyo Co Ltd
Publication of FR2420193A1 publication Critical patent/FR2420193A1/fr
Application granted granted Critical
Publication of FR2420193B1 publication Critical patent/FR2420193B1/fr
Granted 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
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/17—Metallic particles coated with metal

Landscapes

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

Abstract

L'invention concerne un procédé de production d'une poudre magnétique se composant principalement de fer. Selon l'invention, on traite une matière première finement subdivisée choisie dans le groupe consistant en hydroxydes de fer, hydroxydes de fer contenant un composant dopant choisi parmi Co, Mn, Ni, Ti, Bi, Mo, Ag, Cr, Zn, Si, Al et leurs mélanges, oxydes de fer et oxydes de fer contenant un composant dopant choisi parmi Co Mn, Ni, Ti, Bi, Mo, Ag, Cr, Zn, Si, Al et leurs mélanges, avec une solution et/ou une suspension aqueuse d'un élément choisi dans le groupe consistant en zinc, chrome, cuivre, cobalt, nickel, manganèse et antimoine et leurs mélnges afin que le composant métallique soit appliqué à la matière première; on filtre le matériau ainsi traité pour le retirer du milieu liquide et on sèche le pain obtenu; et on réduit le pain sec dans un courant d'un gaz réducteur à une température pouvant atteindre environ 600 degrés C pour former une poudre magnétique se composant principalement de fer. L'invention s'applique notamment à l'enregistrement magnétique.
FR7906603A 1978-03-16 1979-03-15 Production de poudre magnetique Granted FR2420193A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3015178A JPS54122664A (en) 1978-03-16 1978-03-16 Production of magnetic powder for magnetic recording based on iron
JP3015078A JPS54122663A (en) 1978-03-16 1978-03-16 Production of magnetic powder for magnetic recording based on iron

Publications (2)

Publication Number Publication Date
FR2420193A1 true FR2420193A1 (fr) 1979-10-12
FR2420193B1 FR2420193B1 (fr) 1983-10-21

Family

ID=26368438

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906603A Granted FR2420193A1 (fr) 1978-03-16 1979-03-15 Production de poudre magnetique

Country Status (4)

Country Link
DE (1) DE2909995C2 (fr)
FR (1) FR2420193A1 (fr)
GB (1) GB2016526B (fr)
NL (1) NL186784C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462222A1 (fr) * 1979-07-30 1981-02-13 Pfizer Procede de production de particules de fer metallique pour l'enregistrement magnetique et produit obtenu
FR2482945A1 (fr) * 1980-05-23 1981-11-27 Ampex Procede pour preparer des particules de fer tres orientables
DE3334324A1 (de) * 1982-09-22 1984-04-05 Nippon Telegraph & Telephone Public Corp., Tokyo Eisenoxidmagnetfilm und verfahren zu seiner herstellung

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316738A (en) * 1979-02-02 1982-02-23 Ampex Corporation Economical process for producing metal particles for magnetic recording
US4305752A (en) 1979-07-30 1981-12-15 Pfizer Inc. Metallic iron particles for magnetic recording
JPS56109827A (en) * 1980-02-05 1981-08-31 Mitsui Toatsu Chem Inc Manufacture of iron compound particle for magnetic recording medium
JPS56114833A (en) * 1980-02-08 1981-09-09 Mitsui Toatsu Chem Inc Production of fine particle of iron compound for magnetic recording
EP0041257B1 (fr) * 1980-05-30 1984-11-14 Hitachi Maxell Ltd. Procédé de préparation de particules ferromagnétiques contenant du fer métallique
US4305753A (en) * 1980-07-31 1981-12-15 Hercules Incorporated Process for producing ferromagnetic metallic particles
JPS57183627A (en) * 1981-05-07 1982-11-12 Fuji Photo Film Co Ltd Magnetic recording medium
US4437881A (en) * 1982-07-31 1984-03-20 Toda Kogyo Corp. Acicular ferromagnetic alloy particles and process for producing said particles
DE3228659A1 (de) * 1982-07-31 1984-02-02 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von cobalt-epitaxial-beschichteten eisenoxiden fuer die magnetaufzeichnung
JPS5999706A (ja) * 1982-11-29 1984-06-08 Kanto Denka Kogyo Kk 磁気記録用強磁性金属粉末の製造方法
JPS59153810A (ja) * 1983-02-22 1984-09-01 Chisso Corp 強磁性金属微粒子の製造法
JPS59157204A (ja) * 1983-02-23 1984-09-06 Chisso Corp 強磁性金属微粒子の製造方法
CA1226456A (fr) * 1984-01-12 1987-09-08 Michael J. Pryor Methode et appareil de production de particules aciculaires de fer ou d'alliage de fer
US5102732A (en) * 1988-07-15 1992-04-07 Konica Corporation Magnetic recording medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE527378A (fr) *
FR1462867A (fr) * 1965-01-09 1966-12-16 Basf Ag Procédé de préparation de particules métalliques aimantables convenant pour la fabrication de supports de magnétogrammes
GB1312227A (en) * 1970-06-23 1973-04-04 Sony Corp Method of making a magnetic powder
FR2227920A1 (fr) * 1973-05-03 1974-11-29 Philips Nv

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2212934A1 (de) * 1972-03-17 1973-09-20 Philips Nv Verfahren zur herstellung eines im wesentlichen aus eisen bestehenden metallpulvers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE527378A (fr) *
FR1462867A (fr) * 1965-01-09 1966-12-16 Basf Ag Procédé de préparation de particules métalliques aimantables convenant pour la fabrication de supports de magnétogrammes
GB1312227A (en) * 1970-06-23 1973-04-04 Sony Corp Method of making a magnetic powder
FR2227920A1 (fr) * 1973-05-03 1974-11-29 Philips Nv

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462222A1 (fr) * 1979-07-30 1981-02-13 Pfizer Procede de production de particules de fer metallique pour l'enregistrement magnetique et produit obtenu
FR2482945A1 (fr) * 1980-05-23 1981-11-27 Ampex Procede pour preparer des particules de fer tres orientables
DE3334324A1 (de) * 1982-09-22 1984-04-05 Nippon Telegraph & Telephone Public Corp., Tokyo Eisenoxidmagnetfilm und verfahren zu seiner herstellung

Also Published As

Publication number Publication date
GB2016526B (en) 1982-11-03
NL7902091A (nl) 1979-09-18
DE2909995C2 (de) 1984-06-28
NL186784B (nl) 1990-09-17
NL186784C (nl) 1991-02-18
FR2420193B1 (fr) 1983-10-21
DE2909995A1 (de) 1979-09-27
GB2016526A (en) 1979-09-26

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