GB1437843A - Magnetic powder and the preparation thereof - Google Patents

Magnetic powder and the preparation thereof

Info

Publication number
GB1437843A
GB1437843A GB1246374A GB1246374A GB1437843A GB 1437843 A GB1437843 A GB 1437843A GB 1246374 A GB1246374 A GB 1246374A GB 1246374 A GB1246374 A GB 1246374A GB 1437843 A GB1437843 A GB 1437843A
Authority
GB
United Kingdom
Prior art keywords
cobalt
powder
heating
iron oxide
cobalt compound
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
GB1246374A
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Publication of GB1437843A publication Critical patent/GB1437843A/en
Expired 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
    • G11B5/706—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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70689—Magnetite
    • 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
    • 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide

Landscapes

  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Record Carriers (AREA)
GB1246374A 1973-03-20 1974-03-20 Magnetic powder and the preparation thereof Expired GB1437843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3148673A JPS5321119B2 (nl) 1973-03-20 1973-03-20

Publications (1)

Publication Number Publication Date
GB1437843A true GB1437843A (en) 1976-06-03

Family

ID=12332588

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1246374A Expired GB1437843A (en) 1973-03-20 1974-03-20 Magnetic powder and the preparation thereof

Country Status (3)

Country Link
JP (1) JPS5321119B2 (nl)
DE (1) DE2413430C3 (nl)
GB (1) GB1437843A (nl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829344A1 (de) * 1977-07-04 1979-01-25 Sony Corp Verfahren zur herstellung von magnetischen pulvern
US4371567A (en) * 1980-04-28 1983-02-01 Rhone-Poulenc Industries High coercivity, cobalt-doped ferrimagnetic iron oxide particulates
US4741921A (en) * 1977-04-20 1988-05-03 Hitachi Maxell, Ltd. Method for preparing cobalt-containing iron oxide magnetic particles
GB2240336B (en) * 1990-01-29 1993-12-22 Mitsubishi Materials Corp Ceramic composite powders

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324639B2 (nl) * 1974-12-13 1978-07-21
JPS5523451B2 (nl) * 1975-02-20 1980-06-23
JPS608606B2 (ja) * 1975-07-02 1985-03-04 富士写真フイルム株式会社 強磁性粉末の製法
JPS525497A (en) * 1975-07-02 1977-01-17 Fuji Photo Film Co Ltd Ferromagnetic grit manufacturing process
JPS5853493B2 (ja) * 1975-07-02 1983-11-29 富士写真フイルム株式会社 キヨウジセイフンマツノセイホウ
JPS5814729B2 (ja) * 1975-08-01 1983-03-22 富士写真フイルム株式会社 キヨウジセイフンマツノセイゾウホウホウ
JPS6034244B2 (ja) * 1977-06-23 1985-08-07 日立マクセル株式会社 強磁性粉末の製造方法
JPS5853494B2 (ja) * 1977-04-20 1983-11-29 日立マクセル株式会社 磁気記録用強磁性粉末の製造方法
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
JPS5677926A (en) * 1979-11-28 1981-06-26 Tdk Corp Magnetic recording medium using cobalt adhesion type iron oxide
US20100199406A1 (en) 2009-02-06 2010-08-12 Nike, Inc. Thermoplastic Non-Woven Textile Elements
US9682512B2 (en) 2009-02-06 2017-06-20 Nike, Inc. Methods of joining textiles and other elements incorporating a thermoplastic polymer material
CN114226744A (zh) * 2021-11-25 2022-03-25 中国科学院金属研究所 一种形状可控的坡莫合金粉体微波吸收剂的制备方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573980A (en) * 1968-02-19 1971-04-06 Minnesota Mining & Mfg Method of making magnetic particles and recording tape

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741921A (en) * 1977-04-20 1988-05-03 Hitachi Maxell, Ltd. Method for preparing cobalt-containing iron oxide magnetic particles
US4857417A (en) * 1977-04-20 1989-08-15 Hitachi Maxell, Ltd. Cobalt-containing iron oxide magnetic particles and method for the preparation of the same
DE2829344A1 (de) * 1977-07-04 1979-01-25 Sony Corp Verfahren zur herstellung von magnetischen pulvern
US4371567A (en) * 1980-04-28 1983-02-01 Rhone-Poulenc Industries High coercivity, cobalt-doped ferrimagnetic iron oxide particulates
GB2240336B (en) * 1990-01-29 1993-12-22 Mitsubishi Materials Corp Ceramic composite powders

Also Published As

Publication number Publication date
JPS49119196A (nl) 1974-11-14
DE2413430C3 (de) 1981-05-27
JPS5321119B2 (nl) 1978-06-30
DE2413430B2 (de) 1980-07-03
DE2413430A1 (de) 1974-10-03

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940319