NL7217833A - - Google Patents

Info

Publication number
NL7217833A
NL7217833A NL7217833A NL7217833A NL7217833A NL 7217833 A NL7217833 A NL 7217833A NL 7217833 A NL7217833 A NL 7217833A NL 7217833 A NL7217833 A NL 7217833A NL 7217833 A NL7217833 A NL 7217833A
Authority
NL
Netherlands
Application number
NL7217833A
Other versions
NL150938B (nl
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
Publication of NL7217833A publication Critical patent/NL7217833A/xx
Publication of NL150938B publication Critical patent/NL150938B/xx

Links

Classifications

    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • 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
    • B22F1/14—Treatment of metallic powder
    • B22F1/145—Chemical treatment, e.g. passivation or decarburisation
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Soft Magnetic Materials (AREA)
NL727217833A 1971-12-30 1972-12-29 Werkwijze voor het bereiden van naaldvormige stabiele magnetische ijzerdeeltjes. NL150938B (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21445271A 1971-12-30 1971-12-30

Publications (2)

Publication Number Publication Date
NL7217833A true NL7217833A (fr) 1973-07-03
NL150938B NL150938B (nl) 1976-09-15

Family

ID=22799142

Family Applications (1)

Application Number Title Priority Date Filing Date
NL727217833A NL150938B (nl) 1971-12-30 1972-12-29 Werkwijze voor het bereiden van naaldvormige stabiele magnetische ijzerdeeltjes.

Country Status (8)

Country Link
US (1) US3748119A (fr)
JP (1) JPS5219541B2 (fr)
BE (1) BE792840A (fr)
DE (1) DE2262161C3 (fr)
FR (1) FR2165967B1 (fr)
GB (1) GB1358118A (fr)
IT (1) IT973717B (fr)
NL (1) NL150938B (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977985A (en) * 1972-02-23 1976-08-31 Tdk Electronics Company, Limited Magnetic recording medium comprising cobalt or cobalt alloy coated particles of spicular magnetite
NL167729C (nl) * 1973-05-03 1982-01-18 Philips Nv Werkwijze voor het bereiden van een hoofdzakelijk uit ijzer bestaand metaalpoeder.
JPS5631882B2 (fr) * 1973-11-16 1981-07-24
DE2434096C2 (de) * 1974-07-16 1985-10-17 Basf Ag, 6700 Ludwigshafen Nadelförmige, vorwiegend aus Eisen bestehende ferromagnetische Metallteilchen und Verfahren zu ihrer Herstellung
JPS6017802B2 (ja) * 1975-09-05 1985-05-07 株式会社日立製作所 強磁性金属粉末の製造方法
US4023989A (en) * 1975-10-20 1977-05-17 Monsanto Company Method for producing corded steel wire
JPS52134858A (en) * 1976-05-07 1977-11-11 Kanto Denka Kogyo Kk Method of making magnetic recording magnetic powder containing iron as main constituent
JPS534895A (en) * 1976-06-16 1978-01-17 Fujitsu Ltd Manufacture of needle-shaped magnetic iron particles
US4222977A (en) * 1978-05-16 1980-09-16 Monsanto Company Process to produce inorganic hollow fibers
JPS55114880A (en) * 1979-02-28 1980-09-04 Hitachi Ltd Pulser for generating ignition signal
JPS5914081B2 (ja) * 1979-10-05 1984-04-03 日立マクセル株式会社 耐蝕性に優れた金属磁性粉末の製造法
EP0041727B1 (fr) * 1980-06-11 1987-09-09 Hitachi Maxell Ltd. Procédé de préparation de particules ferromagnétiques à base de fer métallique
JPH0620008B2 (ja) * 1987-08-24 1994-03-16 チッソ株式会社 酸化皮膜を有する強磁性金属粉末の製造方法
US5234489A (en) * 1992-05-27 1993-08-10 L'air Liquide Process for reducing oxides contained in iron powder without substantial decarburization thereof
WO2003097236A1 (fr) * 2002-05-15 2003-11-27 Süd-Chemie AG Catalyseur fischer-tropsch prepare au moyen d'un precurseur du fer de grande purete
US7566680B2 (en) * 2002-05-15 2009-07-28 Sud-Chemie Inc. High surface area iron material prepared from a low surface area iron metal precursor
US7939463B1 (en) * 2002-05-15 2011-05-10 Sud-Chemie Inc. Preparation of iron oxides

Also Published As

Publication number Publication date
DE2262161B2 (de) 1975-01-23
FR2165967B1 (fr) 1976-06-04
FR2165967A1 (fr) 1973-08-10
DE2262161A1 (de) 1973-08-16
JPS5219541B2 (fr) 1977-05-28
NL150938B (nl) 1976-09-15
US3748119A (en) 1973-07-24
DE2262161C3 (de) 1980-01-24
BE792840A (fr) 1973-03-30
IT973717B (it) 1974-06-10
GB1358118A (en) 1974-06-26
JPS4879153A (fr) 1973-10-24

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Legal Events

Date Code Title Description
SNR Assignments of patents or rights arising from examined patent applications

Owner name: AMPEX MEDIA CORPORATION

NL80 Information provided on patent owner name for an already discontinued patent

Owner name: AMPEX

V4 Discontinued because of reaching the maximum lifetime of a patent