JPS6455731A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS6455731A
JPS6455731A JP62212437A JP21243787A JPS6455731A JP S6455731 A JPS6455731 A JP S6455731A JP 62212437 A JP62212437 A JP 62212437A JP 21243787 A JP21243787 A JP 21243787A JP S6455731 A JPS6455731 A JP S6455731A
Authority
JP
Japan
Prior art keywords
layer
acicular
contg
coated
iron oxide
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
JP62212437A
Other languages
Japanese (ja)
Other versions
JP2583070B2 (en
Inventor
Tatsuya Nakamura
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
Priority to JP62212437A priority Critical patent/JP2583070B2/en
Priority to EP87309178A priority patent/EP0265189B1/en
Priority to DE8787309178T priority patent/DE3780903T2/en
Publication of JPS6455731A publication Critical patent/JPS6455731A/en
Priority to US07/559,426 priority patent/US5120604A/en
Application granted granted Critical
Publication of JP2583070B2 publication Critical patent/JP2583070B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To maintain an excellent erasing characteristic and to enhance coercive force by coating a resin compsn. contg. the acicular magnetic iron oxide particle powder the surfaces of which are coated with the double layers consisting of the lower layer which is a Co compd. layer and the upper layer which is a specific ferrite layer onto a substrate. CONSTITUTION:The resin compsn. contg. the acicular magnetic iron oxide particle powder the surfaces of which are coated with the double layers consisting of the lower layer which is the Co compd. layer and the upper layer which is the spinel type ferrite layer contg. Mn and Zn or any among Mn, Ni and Zn is coated on the substrate. Acicular maghemite particles, acicular magnetite particles and the particles contg. 1 or >=2 kinds among Co, Ni, Si, Al, Zn, P, etc., therein are used for the iron oxide particles. The ferrite layer is 1.0-10.0wt.% by the weight of Mn.Zn, Ni.Zn or Mn.Ni.Zn with respect to the weight of the acicular iron oxide particles coated with the Co compd. on the particle surfaces and the ratios of Mn.Ni and Mn.Ni are 0.1-80atm.% of Mn, Ni and Zn.
JP62212437A 1986-10-17 1987-08-25 Magnetic recording media Expired - Fee Related JP2583070B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62212437A JP2583070B2 (en) 1987-08-25 1987-08-25 Magnetic recording media
EP87309178A EP0265189B1 (en) 1986-10-17 1987-10-16 Acicular magnetic iron oxide particles, process for preparing the same, and magnetic recording media using such particles
DE8787309178T DE3780903T2 (en) 1986-10-17 1987-10-16 NEEDLE SHAPED MAGNETIC IRON OXIDE PARTICLES, METHOD FOR THE PRODUCTION THEREOF AND MAGNETIC RECORDING CARRIERS USING SUCH PARTICLES.
US07/559,426 US5120604A (en) 1986-10-17 1990-07-26 Acicular magnetic iron oxide particles and magnetic recording media using such particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62212437A JP2583070B2 (en) 1987-08-25 1987-08-25 Magnetic recording media

Publications (2)

Publication Number Publication Date
JPS6455731A true JPS6455731A (en) 1989-03-02
JP2583070B2 JP2583070B2 (en) 1997-02-19

Family

ID=16622590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62212437A Expired - Fee Related JP2583070B2 (en) 1986-10-17 1987-08-25 Magnetic recording media

Country Status (1)

Country Link
JP (1) JP2583070B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100616645B1 (en) * 2004-12-24 2006-08-28 삼성전기주식회사 Method of Manufacturing Magnetic Storage Device Having Single-Domain Ferrite Pillar Array

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100616645B1 (en) * 2004-12-24 2006-08-28 삼성전기주식회사 Method of Manufacturing Magnetic Storage Device Having Single-Domain Ferrite Pillar Array

Also Published As

Publication number Publication date
JP2583070B2 (en) 1997-02-19

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees