JPS6410604A - Magnetic powder and manufacture thereof; magnetic recording medium using same - Google Patents
Magnetic powder and manufacture thereof; magnetic recording medium using sameInfo
- 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
Links
Landscapes
- 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.
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)
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)
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 |
-
1987
- 1987-07-03 JP JP62166591A patent/JP2659957B2/en not_active Expired - Lifetime
Patent Citations (1)
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)
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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