JPS5860504A - 針状の磁性粉末 - Google Patents

針状の磁性粉末

Info

Publication number
JPS5860504A
JPS5860504A JP56158129A JP15812981A JPS5860504A JP S5860504 A JPS5860504 A JP S5860504A JP 56158129 A JP56158129 A JP 56158129A JP 15812981 A JP15812981 A JP 15812981A JP S5860504 A JPS5860504 A JP S5860504A
Authority
JP
Japan
Prior art keywords
magnetic powder
rare earth
powder
iron
atomic
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.)
Granted
Application number
JP56158129A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6244842B2 (enrdf_load_stackoverflow
Inventor
Yoshiharu Shimokawa
下川　善春
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.)
Chiyoda Corp
Original Assignee
Chiyoda Chemical Engineering and Construction Co Ltd
Chiyoda 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 Chiyoda Chemical Engineering and Construction Co Ltd, Chiyoda Corp filed Critical Chiyoda Chemical Engineering and Construction Co Ltd
Priority to JP56158129A priority Critical patent/JPS5860504A/ja
Publication of JPS5860504A publication Critical patent/JPS5860504A/ja
Publication of JPS6244842B2 publication Critical patent/JPS6244842B2/ja
Granted 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
    • G11B5/70652—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
    • G11B5/70668—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 containing a dopant
    • G11B5/70673—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 containing a dopant containing Co

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Magnetic Record Carriers (AREA)
JP56158129A 1981-10-06 1981-10-06 針状の磁性粉末 Granted JPS5860504A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56158129A JPS5860504A (ja) 1981-10-06 1981-10-06 針状の磁性粉末

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56158129A JPS5860504A (ja) 1981-10-06 1981-10-06 針状の磁性粉末

Publications (2)

Publication Number Publication Date
JPS5860504A true JPS5860504A (ja) 1983-04-11
JPS6244842B2 JPS6244842B2 (enrdf_load_stackoverflow) 1987-09-22

Family

ID=15664915

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56158129A Granted JPS5860504A (ja) 1981-10-06 1981-10-06 針状の磁性粉末

Country Status (1)

Country Link
JP (1) JPS5860504A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010092587A (ja) * 2010-01-27 2010-04-22 Dowa Holdings Co Ltd 強磁性金属粉末及びそれを用いた磁気記録媒体
JP2011162882A (ja) * 2011-03-11 2011-08-25 Dowa Holdings Co Ltd 強磁性金属粉末及びそれを用いた磁気記録媒体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010092587A (ja) * 2010-01-27 2010-04-22 Dowa Holdings Co Ltd 強磁性金属粉末及びそれを用いた磁気記録媒体
JP2011162882A (ja) * 2011-03-11 2011-08-25 Dowa Holdings Co Ltd 強磁性金属粉末及びそれを用いた磁気記録媒体

Also Published As

Publication number Publication date
JPS6244842B2 (enrdf_load_stackoverflow) 1987-09-22

Similar Documents

Publication Publication Date Title
JPH0722224A (ja) 強磁性金属粉末
JPH0625702A (ja) 金属磁性粉末及びその製造方法
JPS5860504A (ja) 針状の磁性粉末
JP3337046B2 (ja) コバルトと鉄とを主成分とする紡錘状金属磁性粒子粉末及びその製造法
JP2003247002A (ja) 鉄を主成分とする金属磁性粒子粉末及びその製造法並びに磁気記録媒体
JP3164355B2 (ja) 針状合金磁性粉末の製造方法
JP3144683B2 (ja) 紡錘形を呈した鉄を主成分とする金属磁性粒子粉末
JP3303896B2 (ja) 紡錘状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
JP3264374B2 (ja) 紡錘形を呈した鉄を主成分とする金属磁性粒子粉末の製造法
JPH032321B2 (enrdf_load_stackoverflow)
JP2852460B2 (ja) 紡錘形を呈した鉄を主成分とする金属磁性粒子粉末の製造法
JP2678480B2 (ja) 金属磁性粉
US4497654A (en) Ferromagnetic metallic powders useful for magnetic recording and processes for producing said metallic powders
JPH1083906A (ja) 磁気記録用金属粉末及びその製造法
JP3092649B2 (ja) 鉄を主成分とする紡錘状金属磁性粒子粉末の製造法
JP2002050508A (ja) 磁性粉末の製造方法
JPS61141627A (ja) 針状α−ＦｅＯＯＨ製造方法
JPH0598321A (ja) 金属磁性粉末の製造法
JP3141907B2 (ja) 紡錘状を呈した鉄を主成分とする金属磁性粒子粉末の製造法
JP2925561B2 (ja) 紡錘形を呈した磁性酸化鉄粒子粉末
JPS58159311A (ja) 金属磁性粉末の製造方法
JP2852459B2 (ja) 紡錘形を呈した鉄を主成分とする金属磁性粒子粉末の製造法
JPH08165117A (ja) コバルトを含有する紡錘状ゲータイト粒子粉末及びその製造法
JP3087808B2 (ja) 磁気記録用磁性粒子粉末の製造法
JP3446960B2 (ja) α−オキシ水酸化鉄を用いた磁気記録用磁性金属粉末の製造方法