GB1312227A - Method of making a magnetic powder - Google Patents

Method of making a magnetic powder

Info

Publication number
GB1312227A
GB1312227A GB2947971A GB2947971A GB1312227A GB 1312227 A GB1312227 A GB 1312227A GB 2947971 A GB2947971 A GB 2947971A GB 2947971 A GB2947971 A GB 2947971A GB 1312227 A GB1312227 A GB 1312227A
Authority
GB
United Kingdom
Prior art keywords
cobalt
iron oxide
nickel
suspension
chloride
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
GB2947971A
Other languages
English (en)
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB1312227A publication Critical patent/GB1312227A/en
Expired 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
GB2947971A 1970-06-23 1971-06-23 Method of making a magnetic powder Expired GB1312227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45054581A JPS4922630B1 (enExample) 1970-06-23 1970-06-23

Publications (1)

Publication Number Publication Date
GB1312227A true GB1312227A (en) 1973-04-04

Family

ID=12974650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2947971A Expired GB1312227A (en) 1970-06-23 1971-06-23 Method of making a magnetic powder

Country Status (6)

Country Link
US (1) US3702270A (enExample)
JP (1) JPS4922630B1 (enExample)
CA (1) CA948078A (enExample)
DE (1) DE2130921C3 (enExample)
GB (1) GB1312227A (enExample)
NL (1) NL173659C (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420193A1 (fr) * 1978-03-16 1979-10-12 Kanto Denka Kogyo Kk Production de poudre magnetique
US4274865A (en) 1978-03-16 1981-06-23 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4306921A (en) 1978-03-16 1981-12-22 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902888A (en) * 1971-08-19 1975-09-02 Fuji Photo Film Co Ltd Process for preparing ferromagnetic alloy powder
JPS5225959B2 (enExample) * 1972-01-13 1977-07-11
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
DE2212933A1 (de) * 1972-03-17 1973-09-20 Philips Nv Verfahren zur herstellung eines im wesentlichen aus eisen bestehenden metallpulvers
JPS59962B2 (ja) * 1973-08-15 1984-01-10 富士写真フイルム株式会社 ジキキロクバイタイヨウフンマツジセイザイリヨウ オヨビ セイゾウホウホウ
US4067755A (en) * 1974-06-25 1978-01-10 Tdk Electronics Company, Ltd. Method of making powdered magnetic iron oxide material
DE2434096C2 (de) * 1974-07-16 1985-10-17 Basf Ag, 6700 Ludwigshafen Nadelförmige, vorwiegend aus Eisen bestehende ferromagnetische Metallteilchen und Verfahren zu ihrer Herstellung
IT1026663B (it) * 1974-11-29 1978-10-20 Montedison Spa Procedimento per preparare polve ri metalliche a base di ferro per registrzione hagnetica
US4043846A (en) * 1975-03-17 1977-08-23 Hitachi, Ltd. Method of producing ferromagnetic metal powder by gaseous reduction of silicon compound-coated raw material
US4133677A (en) * 1976-04-05 1979-01-09 Toda Kogyo Corp. Process for producing acicular magnetic metallic particle powder
JPS6044805B2 (ja) * 1976-08-27 1985-10-05 日本ビクター株式会社 磁気記録媒体の製造方法
US4115106A (en) * 1976-10-20 1978-09-19 National Standard Company Method for producing metallic oxide compounds
JPS5813008B2 (ja) * 1977-10-06 1983-03-11 日本ビクター株式会社 磁性鉄粉の製造方法
DE2935357A1 (de) * 1979-09-01 1981-09-10 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung nadelfoermiger ferromagnetischer eisenteilchen und deren verwendung
US4305753A (en) * 1980-07-31 1981-12-15 Hercules Incorporated Process for producing ferromagnetic metallic particles
EP0076462B2 (en) * 1981-10-01 1991-01-16 Agency Of Industrial Science And Technology Method of production of magnetic particles
JPS5979431A (ja) * 1982-10-29 1984-05-08 Konishiroku Photo Ind Co Ltd 磁気記録媒体
JPS5980901A (ja) * 1982-11-01 1984-05-10 Fuji Photo Film Co Ltd 強磁性金属粉末の製造法
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
JP2582764B2 (ja) * 1986-02-05 1997-02-19 バスフ アクチェン ゲゼルシャフト 本質的に鉄から成る針状強磁性金属粉末の製造方法
DE3901027A1 (de) * 1989-01-14 1990-07-26 Studiengesellschaft Kohle Mbh Nadelfoermige eisen-magnetpigmente mit einstellbarer koezitivfeldstaerke und verfahren zu deren herstellung
US6790325B2 (en) * 2001-04-09 2004-09-14 Hewlett-Packard Development Company, L.P. Re-usable mandrel for fabrication of ink-jet orifice plates
MX387512B (es) 2018-08-27 2025-03-18 Smidth As F L Catalizadores en estado solido para aplicaciones de lixiviacion a temperatura baja o moderada y metodos de los mismos

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122637A (en) * 1965-10-20 1968-08-07 Wolfen Filmfab Veb Process for the stabilisation of iron oxides containing water of constitution
US3573980A (en) * 1968-02-19 1971-04-06 Minnesota Mining & Mfg Method of making magnetic particles and recording tape
NL6803123A (enExample) * 1968-03-05 1969-09-09
JPS6420939A (en) 1987-07-13 1989-01-24 Hitachi Ltd Automatic screw tightening device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420193A1 (fr) * 1978-03-16 1979-10-12 Kanto Denka Kogyo Kk Production de poudre magnetique
US4274865A (en) 1978-03-16 1981-06-23 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4306921A (en) 1978-03-16 1981-12-22 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4384892A (en) 1978-03-16 1983-05-24 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4404024A (en) 1978-03-16 1983-09-13 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4447264A (en) * 1978-03-16 1984-05-08 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder

Also Published As

Publication number Publication date
NL173659B (nl) 1983-09-16
NL7108680A (enExample) 1971-12-27
US3702270A (en) 1972-11-07
DE2130921C3 (de) 1987-05-07
JPS4922630B1 (enExample) 1974-06-10
NL173659C (nl) 1984-02-16
DE2130921A1 (de) 1971-12-30
DE2130921B2 (de) 1980-09-18
CA948078A (en) 1974-05-28

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Legal Events

Date Code Title Description
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years