JPS6455732A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6455732A JPS6455732A JP21197887A JP21197887A JPS6455732A JP S6455732 A JPS6455732 A JP S6455732A JP 21197887 A JP21197887 A JP 21197887A JP 21197887 A JP21197887 A JP 21197887A JP S6455732 A JPS6455732 A JP S6455732A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic layer
- powder
- ratio
- org
- dispersing
- 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
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To attain a higher density and higher output by forming an under coating magnetic layer and top coating magnetic layer formed by dispersing hexagonal crystal type ferrite planar powder having specific shapes into org. binders on a substrate. CONSTITUTION:The under coating magnetic layer formed by dispersing the hexagonal crystal type ferrite planar powder having <=10 ratio of grain size and thickness together with the org. binder and coating the mixture is formed on the substrate and the top coating magnetic layer which is formed by dispersing and coating the hexagonal crystal type ferrite planar powder having >=15 ratio of the grain size and thickness together with the org. binder and is so oriented as to parallel the plate plane with the magnetic layer are is formed thereon. The hexagonal ferrite powder having the larger platy ratio is preferably incorporated into the shallow layer of the magnetic layers and the hexagonal ferrite powder having the smaller platy ratio into the deep layer. The grain size of the ferrite powder particles is preferably 0.05-0.3mum in order to improve C/N. In addition, the axis of easy magnetization is perpendicular to the surface and the coercive force is 300-800 ersted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21197887A JPH0770048B2 (en) | 1987-08-26 | 1987-08-26 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21197887A JPH0770048B2 (en) | 1987-08-26 | 1987-08-26 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6455732A true JPS6455732A (en) | 1989-03-02 |
JPH0770048B2 JPH0770048B2 (en) | 1995-07-31 |
Family
ID=16614859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21197887A Expired - Lifetime JPH0770048B2 (en) | 1987-08-26 | 1987-08-26 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0770048B2 (en) |
-
1987
- 1987-08-26 JP JP21197887A patent/JPH0770048B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0770048B2 (en) | 1995-07-31 |
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