GB1441183A - Magnetic recording particles - Google Patents

Magnetic recording particles

Info

Publication number
GB1441183A
GB1441183A GB983874A GB983874A GB1441183A GB 1441183 A GB1441183 A GB 1441183A GB 983874 A GB983874 A GB 983874A GB 983874 A GB983874 A GB 983874A GB 1441183 A GB1441183 A GB 1441183A
Authority
GB
United Kingdom
Prior art keywords
particles
iron oxide
cobalt
magnetic recording
march
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
GB983874A
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 GB1441183A publication Critical patent/GB1441183A/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
    • 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
    • G11B5/70652—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 gamma - Fe2 O3
    • G11B5/70657—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 gamma - Fe2 O3 with a skin

Landscapes

  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
GB983874A 1973-03-05 1974-03-05 Magnetic recording particles Expired GB1441183A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2515973A JPS5321118B2 (enrdf_load_stackoverflow) 1973-03-05 1973-03-05

Publications (1)

Publication Number Publication Date
GB1441183A true GB1441183A (en) 1976-06-30

Family

ID=12158232

Family Applications (1)

Application Number Title Priority Date Filing Date
GB983874A Expired GB1441183A (en) 1973-03-05 1974-03-05 Magnetic recording particles

Country Status (3)

Country Link
JP (1) JPS5321118B2 (enrdf_load_stackoverflow)
DE (1) DE2410517C3 (enrdf_load_stackoverflow)
GB (1) GB1441183A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2380225A1 (fr) * 1977-02-12 1978-09-08 Basf Ag Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt
US4287233A (en) 1979-02-13 1981-09-01 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
US4296149A (en) 1979-02-13 1981-10-20 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
US4631140A (en) * 1984-10-18 1986-12-23 Basf Aktiengesellschaft Ferrimagnetic particles and their preparation
US4923519A (en) * 1986-09-13 1990-05-08 Bayer Aktiengesellschaft Magnetic iron oxide pigments and a process for their preparation
CN112374877A (zh) * 2020-10-09 2021-02-19 河南师范大学 具有磁阻转换行为的CoFe2O4-CrO2复合材料的制备方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5259894A (en) * 1975-11-13 1977-05-17 Tdk Corp Magnetic material
US4137342A (en) * 1976-10-29 1979-01-30 Minnesota Mining And Manufacturing Company Cobalt-doped acicular hyper-magnetite particles
JPS5939814B2 (ja) * 1978-03-16 1984-09-26 ティーディーケイ株式会社 磁気記録媒体の製造方法
JPS5852806A (ja) * 1981-09-24 1983-03-29 Hitachi Maxell Ltd 磁気記録媒体
JPS6018609B2 (ja) * 1981-10-01 1985-05-11 工業技術院長 強磁性粉末およびその製造方法
US4944985A (en) * 1988-04-11 1990-07-31 Leach & Garner Method for electroless plating of ultrafine or colloidal particles and products produced thereby
DE3910782C2 (de) * 1988-12-24 2003-08-28 Toda Kogyo Corp Verfahren zur Herstellung von magnetischen Eisenoxiden und so erhaltene Pigmente

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA902968A (en) * 1972-06-20 Sony Corporation Method of making acicular cobalt-modified maghemite powder
JPS4974400U (enrdf_load_stackoverflow) * 1972-10-12 1974-06-27
JPS5224238A (en) * 1972-12-11 1977-02-23 Toshiyuki Oota Dip coating of aluminum

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2380225A1 (fr) * 1977-02-12 1978-09-08 Basf Ag Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt
US4287233A (en) 1979-02-13 1981-09-01 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
US4296149A (en) 1979-02-13 1981-10-20 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
US4631140A (en) * 1984-10-18 1986-12-23 Basf Aktiengesellschaft Ferrimagnetic particles and their preparation
US4923519A (en) * 1986-09-13 1990-05-08 Bayer Aktiengesellschaft Magnetic iron oxide pigments and a process for their preparation
CN112374877A (zh) * 2020-10-09 2021-02-19 河南师范大学 具有磁阻转换行为的CoFe2O4-CrO2复合材料的制备方法
CN112374877B (zh) * 2020-10-09 2022-05-13 河南师范大学 具有磁阻转换行为的CoFe2O4-CrO2复合材料的制备方法

Also Published As

Publication number Publication date
JPS49113199A (enrdf_load_stackoverflow) 1974-10-29
DE2410517A1 (de) 1974-09-12
DE2410517C3 (de) 1979-09-27
DE2410517B2 (de) 1979-02-01
JPS5321118B2 (enrdf_load_stackoverflow) 1978-06-30

Similar Documents

Publication Publication Date Title
US4050962A (en) Manufacture of ferromagnetic, acicular metallic iron particles by hydrogen reduction
US3702270A (en) Method of making a magnetic powder
GB1441183A (en) Magnetic recording particles
GB1392980A (en) Production of acicular magnetic iron oxides
GB1264994A (enrdf_load_stackoverflow)
GB1432643A (en) Manufacture of cobalt-modified ypsilon-iron-iii-oxides
GB1347615A (en) Cobalt doped magnetic iron oxide particles
GB1597680A (en) Manufacture of acicular ferromagnetic pigment particles
GB1269859A (en) Magnetisable particulate material
GB1437843A (en) Magnetic powder and the preparation thereof
KR850003025A (ko) 자기기록을 위한 육각판형 바륨페라이트입자 및 그 제조방법
KR850008031A (ko) 자기 기록용 판상 아철산 바륨입자와 그 제조방법
GB1430676A (en) Magnetizable particles
EP0279626B1 (en) Plate-like magnetite particles, plate-like maghemite particles and process for producing the same
US4010310A (en) Magnetic powder
GB1268458A (en) Improvements in and relating to the preparation of cobalt doped gamma ferric oxide
KR870007539A (ko) 자기 기록용 판상 바륨 페라이트 입자 및 그의 제조방법
US3958068A (en) Process for the production of powdered magnetic material
US3243375A (en) Precipitation process for preparing acicular magnetic metal oxide particles
GB1125093A (en) Production of magnetizable metallic particles suitable for the production of magnetic recording media
US3873462A (en) Cobalt modified iron oxides
GB1395704A (en) Magnetic materials
GB1458623A (en) Production of acicular cobalt-containing ferri-magnetic iron oxides
JPS54122103A (en) Magnetic recording medium and production of the same
JPS57198607A (en) Manufacture of magnetic iron oxide particle powder for magnetic recording material

Legal Events

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

Effective date: 19940304