DE69321531D1 - Granulierte Teilchen für magnetische Teilchen für magnetische Aufzeichnung und Verfahren für ihre Herstellung - Google Patents

Granulierte Teilchen für magnetische Teilchen für magnetische Aufzeichnung und Verfahren für ihre Herstellung

Info

Publication number
DE69321531D1
DE69321531D1 DE69321531T DE69321531T DE69321531D1 DE 69321531 D1 DE69321531 D1 DE 69321531D1 DE 69321531 T DE69321531 T DE 69321531T DE 69321531 T DE69321531 T DE 69321531T DE 69321531 D1 DE69321531 D1 DE 69321531D1
Authority
DE
Germany
Prior art keywords
particles
magnetic
production
magnetic recording
granular
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 - Fee Related
Application number
DE69321531T
Other languages
English (en)
Other versions
DE69321531T2 (de
Inventor
Kenji Okinaka
Yasutaka Ota
Kohji Mori
Hirofumi Kawasaki
Masayuki Uegami
Akio Mishima
Katsumi Yamashita
Minoru Yamasaki
Manabu Matsumoto
Kunihiro Kouchi
Hiroki Kamon
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
Application filed by Toda Kogyo Corp filed Critical Toda Kogyo Corp
Application granted granted Critical
Publication of DE69321531D1 publication Critical patent/DE69321531D1/de
Publication of DE69321531T2 publication Critical patent/DE69321531T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G11B5/714—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 dimension of the magnetic particles
    • 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
    • G11B5/70626—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 containing non-metallic substances
    • G11B5/70642—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 containing non-metallic substances iron oxides
    • G11B5/70647—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 containing non-metallic substances iron oxides with a skin
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Magnetic Record Carriers (AREA)
DE69321531T 1992-08-04 1993-08-02 Granulierte Teilchen für magnetische Teilchen für magnetische Aufzeichnung und Verfahren für ihre Herstellung Expired - Fee Related DE69321531T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP22921392 1992-08-04
JP28660492 1992-09-30

Publications (2)

Publication Number Publication Date
DE69321531D1 true DE69321531D1 (de) 1998-11-19
DE69321531T2 DE69321531T2 (de) 1999-03-04

Family

ID=26528689

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69321531T Expired - Fee Related DE69321531T2 (de) 1992-08-04 1993-08-02 Granulierte Teilchen für magnetische Teilchen für magnetische Aufzeichnung und Verfahren für ihre Herstellung

Country Status (3)

Country Link
US (1) US5531922A (de)
EP (1) EP0582452B1 (de)
DE (1) DE69321531T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5713982A (en) * 1995-12-13 1998-02-03 Clark; Donald W. Iron powder and method of producing such
US6056890A (en) * 1998-04-23 2000-05-02 Ferronics Incorporated Ferrimagnetic materials with temperature stability and method of manufacturing
US6475404B1 (en) * 2000-05-03 2002-11-05 Lord Corporation Instant magnetorheological fluid mix
US6827757B2 (en) * 2001-11-30 2004-12-07 Jfe Steel Corporation Magnetite-iron based composite powder, magnetite-iron based powder mixture, method for producing the same, method for remedying polluted soil, water or gases and electromagnetic wave absorber
AU2007202693B2 (en) * 2003-01-20 2009-12-10 Novartis Ag Process for modifying drug crystal formation
GB0301259D0 (en) * 2003-01-20 2003-02-19 Novartis Ag Organic compounds
TWI468167B (zh) 2007-11-16 2015-01-11 威佛（國際）股份有限公司 藥學組成物
WO2009155414A1 (en) * 2008-06-18 2009-12-23 Board Of Trustees Of The University Of Arkansas Microwave-assisted synthesis of carbon and carbon-metal composites from lignin, tannin and asphalt derivatives
US8920688B2 (en) * 2008-06-18 2014-12-30 Board Of Trustees Of The University Of Arkansas Microwave-assisted synthesis of transition metal phosphide
US8790615B2 (en) * 2008-06-18 2014-07-29 Board Of Trustees Of The University Of Arkansas Methods of synthesizing carbon-magnetite nanocomposites from renewable resource materials and application of same
US9643165B2 (en) 2008-06-18 2017-05-09 Board Of Trustees Of The University Of Arkansas Doped-carbon composites, synthesizing methods and applications of the same
WO2012048985A1 (de) * 2010-10-15 2012-04-19 Evonik Degussa Gmbh Umhüllte eisenoxidpartikel
WO2014181548A1 (ja) * 2013-05-10 2014-11-13 三井化学株式会社 反射材用ポリエステル樹脂組成物およびそれを含む反射板
US9458027B2 (en) * 2013-06-19 2016-10-04 New Technology Ventures, Inc. Sulfided iron (II) compound and method of manufacture
US9023237B2 (en) * 2013-06-19 2015-05-05 New Technology Ventures, Inc. Highly active nano iron catalyst for the absorption of hydrogen sulfide
CN107008573B (zh) * 2017-06-19 2019-05-03 中南大学 一种磁性淀粉选矿药剂的制备方法和应用

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5521146A (en) * 1978-08-01 1980-02-15 Tdk Corp Manufacturing method of magnetic powder
JPS606525B2 (ja) * 1978-12-19 1985-02-19 三菱マテリアル株式会社 磁気テ−プ用鉄粉および鉄↓−コバルト合金粉末の製造法
JPS5754205A (ja) * 1980-09-17 1982-03-31 Hitachi Maxell Ltd Jiseifunnoseizohoho
JPS57116706A (en) * 1981-01-10 1982-07-20 Hitachi Maxell Ltd Manufacture of metallic magnetic powder
JPS6388807A (ja) * 1986-10-02 1988-04-19 Mitsui Toatsu Chem Inc 磁性鉄粉の製造方法

Also Published As

Publication number Publication date
DE69321531T2 (de) 1999-03-04
EP0582452A1 (de) 1994-02-09
EP0582452B1 (de) 1998-10-14
US5531922A (en) 1996-07-02

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee