NL7905850A - Werkwijze voor het bereiden van een magnetisch poeder. - Google Patents

Werkwijze voor het bereiden van een magnetisch poeder. Download PDF

Info

Publication number
NL7905850A
NL7905850A NL7905850A NL7905850A NL7905850A NL 7905850 A NL7905850 A NL 7905850A NL 7905850 A NL7905850 A NL 7905850A NL 7905850 A NL7905850 A NL 7905850A NL 7905850 A NL7905850 A NL 7905850A
Authority
NL
Netherlands
Prior art keywords
iron oxide
magnetic powder
powder
dispersed
aqueous solution
Prior art date
Application number
NL7905850A
Other languages
English (en)
Dutch (nl)
Original Assignee
Tdk Electronics 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
Application filed by Tdk Electronics Co Ltd filed Critical Tdk Electronics Co Ltd
Publication of NL7905850A publication Critical patent/NL7905850A/nl

Links

Classifications

    • 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
    • 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
    • H01F1/061—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 protective layer
    • 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
    • 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
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
    • 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

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
NL7905850A 1978-08-01 1979-07-30 Werkwijze voor het bereiden van een magnetisch poeder. NL7905850A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9386978 1978-08-01
JP9386978A JPS5521146A (en) 1978-08-01 1978-08-01 Manufacturing method of magnetic powder

Publications (1)

Publication Number Publication Date
NL7905850A true NL7905850A (nl) 1980-02-05

Family

ID=14094453

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7905850A NL7905850A (nl) 1978-08-01 1979-07-30 Werkwijze voor het bereiden van een magnetisch poeder.

Country Status (5)

Country Link
US (1) US4248907A (de)
JP (1) JPS5521146A (de)
DE (1) DE2930447A1 (de)
GB (1) GB2026998B (de)
NL (1) NL7905850A (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3167164D1 (en) * 1980-05-30 1984-12-20 Hitachi Maxell Process for preparing ferromagnetic particles comprising metallic iron
DE3204547A1 (de) * 1982-02-10 1983-08-18 Basf Ag, 6700 Ludwigshafen Nadelfoermiges ferrimagnetisches eisenoxid und verfahren zu seiner herstellung
JPS58159308A (ja) * 1982-03-17 1983-09-21 Hitachi Maxell Ltd 金属磁性粉末の製造方法
US4728537A (en) * 1985-11-29 1988-03-01 Allied Colloids Limited Ore pelletization
GB8529418D0 (en) * 1985-11-29 1986-01-08 Allied Colloids Ltd Iron ore pelletisation
US4826671A (en) * 1986-03-14 1989-05-02 Basf Aktiengesellschaft Preparation of acicular α-Fe2 O3
US5075169A (en) * 1988-06-08 1991-12-24 Toda Kogyo Corp. Plate-like composite ferrite particles for magnetic recording and process for producing the same
DE69321531T2 (de) * 1992-08-04 1999-03-04 Toda Kogyo Corp., Hiroshima Granulierte Teilchen für magnetische Teilchen für magnetische Aufzeichnung und Verfahren für ihre Herstellung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1587959A (de) * 1967-11-25 1970-04-03

Also Published As

Publication number Publication date
US4248907A (en) 1981-02-03
DE2930447A1 (de) 1980-02-21
JPS5521146A (en) 1980-02-15
GB2026998A (en) 1980-02-13
GB2026998B (en) 1982-08-04

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Legal Events

Date Code Title Description
A1A A request for search or an international-type search has been filed
BB A search report has been drawn up
BT A notification was added to the application dossier and made available to the public
BC A request for examination has been filed
A85 Still pending on 85-01-01
BN A decision not to publish the application has become irrevocable