JPS6410604A - Magnetic powder and manufacture thereof; magnetic recording medium using same - Google Patents

Magnetic powder and manufacture thereof; magnetic recording medium using same

Info

Publication number
JPS6410604A
JPS6410604A JP62166591A JP16659187A JPS6410604A JP S6410604 A JPS6410604 A JP S6410604A JP 62166591 A JP62166591 A JP 62166591A JP 16659187 A JP16659187 A JP 16659187A JP S6410604 A JPS6410604 A JP S6410604A
Authority
JP
Japan
Prior art keywords
refers
magnetic
magnetic powder
whose
element selected
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
JP62166591A
Other languages
Japanese (ja)
Other versions
JP2659957B2 (en
Inventor
Shinichi Kitahata
Mikio Kishimoto
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP62166591A priority Critical patent/JP2659957B2/en
Publication of JPS6410604A publication Critical patent/JPS6410604A/en
Application granted granted Critical
Publication of JP2659957B2 publication Critical patent/JP2659957B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Abstract

PURPOSE:To obtain a magnetic powder which is composed of a substitution-type hexagonal-system ferrite having an appropriate coercive force and a high saturated magnetization degree and to obtain a magnetic recording medium whose magnetic flux density is large, whose electromagnetic conversion characteristic is excellent, whose surface electrical resistance is low and which is suitable for a perpendicular magnetic recording system by using the magnetic powder. CONSTITUTION:A magnetic layer which is composed mainly of a magnetic powder and a binder is formed on a non-magnetic support substance. The magnetic powder is composed of sheet-like particles whose alpha-Fe ratio obtained by the X-ray diffraction intensity is 2-20wt.% and whose remaining part is a hexagonal-system ferrite. A suitable material for this magnetic powder has a composition as expressed by a general formula on the right. The material composed of the sheet-like particles whose one part of Fe in the formula is in said alpha-Fe ratio can be enumerated. In the formula, A refers to at least one element selected from Ba, Sr, Pb and Ca; M<2+> refers to a bivalent ion of at least one element selected from Cu, Mn, Co, Zn, Ni and Ng; M<4+> refers to a guadrivalent ion of at least one element selected from Ti, Zr and Sn; n refers to a real number of 3-7; X refers to 0-0.2; y refers to 0-0.2; z refers to 0.03-0.26.
JP62166591A 1987-07-03 1987-07-03 Magnetic powder, manufacturing method thereof, and magnetic recording medium using the magnetic powder Expired - Lifetime JP2659957B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62166591A JP2659957B2 (en) 1987-07-03 1987-07-03 Magnetic powder, manufacturing method thereof, and magnetic recording medium using the magnetic powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62166591A JP2659957B2 (en) 1987-07-03 1987-07-03 Magnetic powder, manufacturing method thereof, and magnetic recording medium using the magnetic powder

Publications (2)

Publication Number Publication Date
JPS6410604A true JPS6410604A (en) 1989-01-13
JP2659957B2 JP2659957B2 (en) 1997-09-30

Family

ID=15834119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62166591A Expired - Lifetime JP2659957B2 (en) 1987-07-03 1987-07-03 Magnetic powder, manufacturing method thereof, and magnetic recording medium using the magnetic powder

Country Status (1)

Country Link
JP (1) JP2659957B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6442104A (en) * 1987-08-08 1989-02-14 Toshiba Corp Magnetic powder for magnetic recording
JPH0378115A (en) * 1989-08-21 1991-04-03 Matsushita Electric Ind Co Ltd Magnetic recording medium
US5858265A (en) * 1994-11-25 1999-01-12 The University Of Birmingham Hexaferrite materials
JP2012160486A (en) * 2010-01-21 2012-08-23 Fujifilm Corp Magnetic particle and method for preparing the same, and magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61152003A (en) * 1984-12-26 1986-07-10 Toshiba Corp Hexagonal system ferrite magnetic powder for magnetic recording

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61152003A (en) * 1984-12-26 1986-07-10 Toshiba Corp Hexagonal system ferrite magnetic powder for magnetic recording

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6442104A (en) * 1987-08-08 1989-02-14 Toshiba Corp Magnetic powder for magnetic recording
JPH0378115A (en) * 1989-08-21 1991-04-03 Matsushita Electric Ind Co Ltd Magnetic recording medium
US5858265A (en) * 1994-11-25 1999-01-12 The University Of Birmingham Hexaferrite materials
JP2012160486A (en) * 2010-01-21 2012-08-23 Fujifilm Corp Magnetic particle and method for preparing the same, and magnetic recording medium

Also Published As

Publication number Publication date
JP2659957B2 (en) 1997-09-30

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