DE3478286D1 - Ferromagnetic alloy particles for magnetic recording media and process for their manufacture - Google Patents

Ferromagnetic alloy particles for magnetic recording media and process for their manufacture

Info

Publication number
DE3478286D1
DE3478286D1 DE8484309054T DE3478286T DE3478286D1 DE 3478286 D1 DE3478286 D1 DE 3478286D1 DE 8484309054 T DE8484309054 T DE 8484309054T DE 3478286 T DE3478286 T DE 3478286T DE 3478286 D1 DE3478286 D1 DE 3478286D1
Authority
DE
Germany
Prior art keywords
manufacture
magnetic recording
recording media
alloy particles
ferromagnetic alloy
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
DE8484309054T
Other languages
English (en)
Inventor
Akio Mishima
Yosiro Okuda
Hiroshi Sumita
Yoshitaka Yoshinaga
Akira Mukaizaka
Tokihiro Kurata
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.)
Toda Kogyo Corp
Original Assignee
Toda Kogyo 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
Priority claimed from JP58246462A external-priority patent/JPS60138002A/ja
Priority claimed from JP59245300A external-priority patent/JPH0619082B2/ja
Application filed by Toda Kogyo Corp filed Critical Toda Kogyo Corp
Application granted granted Critical
Publication of DE3478286D1 publication Critical patent/DE3478286D1/de
Expired legal-status Critical Current

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • 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
    • G11B5/70615—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 containing Fe metal or alloys
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
DE8484309054T 1983-12-27 1984-12-21 Ferromagnetic alloy particles for magnetic recording media and process for their manufacture Expired DE3478286D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58246462A JPS60138002A (ja) 1983-12-27 1983-12-27 紡錘型を呈した鉄を主成分とする金属磁性粒子粉末及びその製造法
JP59245300A JPH0619082B2 (ja) 1984-11-19 1984-11-19 紡錘型を呈した鉄を主成分とする金属磁性粒子粉末及びその製造法

Publications (1)

Publication Number Publication Date
DE3478286D1 true DE3478286D1 (en) 1989-06-29

Family

ID=26537158

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484309054T Expired DE3478286D1 (en) 1983-12-27 1984-12-21 Ferromagnetic alloy particles for magnetic recording media and process for their manufacture

Country Status (4)

Country Link
US (1) US4773931A (de)
EP (1) EP0148634B1 (de)
KR (1) KR850004869A (de)
DE (1) DE3478286D1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3876529T2 (de) * 1987-07-31 1993-06-24 Tdk Corp Magnetisches weicheisenpulver zur formung magnetischer abschirmung, verbindung und verfahren zur herstellung.
DE68923544T2 (de) * 1988-12-29 1996-03-28 Toda Kogyo Corp Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.
US5238483A (en) * 1989-01-27 1993-08-24 Toda Kogyo Corporation Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same
DE68918836T2 (de) * 1989-01-27 1995-02-23 Toda Kogyo Corp Nadelförmige magnetische Teilchen aus einer Eisenlegierung für magnetische Aufzeichnung und Verfahren zu ihrer Herstellung.
US5137783A (en) * 1989-04-07 1992-08-11 Toda Kogyo Corporation Acicular magnetic metal particles containing iron as main ingredient and process for producing the same
US5028483A (en) * 1990-06-01 1991-07-02 Minnesota Mining And Manufacturing Company Magnetic recording medium comprising acicular dendrite free iron oxide magnetic pigment particles
EP0466338B1 (de) * 1990-06-26 1995-12-20 Toda Kogyo Corp. Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung
JPH09504503A (ja) * 1993-11-01 1997-05-06 ミネソタ・マイニング・アンド・マニュファクチュアリング・カンパニー ゲータイトの製造方法
DE102006042843A1 (de) * 2006-09-08 2008-03-27 Nanogate Ag Elektretausrüstung
JP7172091B2 (ja) * 2018-03-28 2022-11-16 Tdk株式会社 複合磁性体

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1099221A (fr) * 1953-03-17 1955-08-31 Electro Chimie Soc D Procédé de production de poudres magnétisables et aimants permanents obtenus à partir de ces poudres
JPS508099A (de) * 1973-05-28 1975-01-28
JPS52155124A (en) * 1976-06-18 1977-12-23 Hitachi Metals Ltd Permanent magnetic alloy
JPS54122664A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
JPS54122663A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
US4289549A (en) * 1978-10-31 1981-09-15 Kabushiki Kaisha Suwa Seikosha Resin bonded permanent magnet composition
JPS5853688B2 (ja) * 1980-08-05 1983-11-30 戸田工業株式会社 Ｆｅ−Ｍｇを主成分とする針状晶合金磁性粒子粉末の製造法
US4400337A (en) * 1981-01-10 1983-08-23 Hitachi Maxell, Ltd. Method for production of metal magnetic particles
JPS57183626A (en) * 1981-05-07 1982-11-12 Fuji Photo Film Co Ltd Magnetic recording medium
JPS5920402A (ja) * 1982-07-26 1984-02-02 Fuji Photo Film Co Ltd 強磁性金属粉末
US4437881A (en) * 1982-07-31 1984-03-20 Toda Kogyo Corp. Acicular ferromagnetic alloy particles and process for producing said particles

Also Published As

Publication number Publication date
EP0148634A2 (de) 1985-07-17
US4773931A (en) 1988-09-27
EP0148634B1 (de) 1989-05-24
KR850004869A (ko) 1985-07-27
EP0148634A3 (en) 1986-06-25

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee