JPS5588307A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5588307A JPS5588307A JP16192278A JP16192278A JPS5588307A JP S5588307 A JPS5588307 A JP S5588307A JP 16192278 A JP16192278 A JP 16192278A JP 16192278 A JP16192278 A JP 16192278A JP S5588307 A JPS5588307 A JP S5588307A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- binder
- expressed
- mixing
- rare earth
- 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)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain a magnetic medium with high magnetic resistance capable of preventing a magnetic signal from being erased by externally disturbing field by mixing a magnetic powder of such composition as is expressed by a specific formula consisting of Y or rare earth element and Fe, Co, etc. in the binder.
CONSTITUTION: A magnetic powder of such composition as is expressed by a general formula RM5 or R2M17 (R being Y or rare earth element, M being Fe, Co, Fe-Co or that of being substituted with Cu partly therefor) is contained in a binder, thereby securing magnetic resistance Hc at about 3,000 Oe or over and a ratio of Hc to Q field value Hq at about 3 or over. For the magnetic powder, for example, SmCo5, YCo5, CeCo5, etc. are preferable. To obtain said characteristics, for example, an ingot of magnetic material is treated thermally at 800W1000°C cooled down quickly, ground to particles at 50Å up to 1μm, and a magnetic coating is prepared by mixing the binder so as to obtain a weight ratio of the magnetic particles to the binder at 20W1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53161922A JPS6033286B2 (en) | 1978-12-27 | 1978-12-27 | magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53161922A JPS6033286B2 (en) | 1978-12-27 | 1978-12-27 | magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5588307A true JPS5588307A (en) | 1980-07-04 |
JPS6033286B2 JPS6033286B2 (en) | 1985-08-02 |
Family
ID=15744575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53161922A Expired JPS6033286B2 (en) | 1978-12-27 | 1978-12-27 | magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6033286B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59201217A (en) * | 1983-04-28 | 1984-11-14 | Tohoku Metal Ind Ltd | Magnetic recording medium |
EP0137949A2 (en) * | 1983-08-19 | 1985-04-24 | Kabushiki Kaisha Toshiba | Magnetic recording medium |
US5230818A (en) * | 1991-12-20 | 1993-07-27 | Eastman Kodak Company | Coating compositions for master media for anhysteretic recording |
-
1978
- 1978-12-27 JP JP53161922A patent/JPS6033286B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59201217A (en) * | 1983-04-28 | 1984-11-14 | Tohoku Metal Ind Ltd | Magnetic recording medium |
EP0137949A2 (en) * | 1983-08-19 | 1985-04-24 | Kabushiki Kaisha Toshiba | Magnetic recording medium |
US5230818A (en) * | 1991-12-20 | 1993-07-27 | Eastman Kodak Company | Coating compositions for master media for anhysteretic recording |
Also Published As
Publication number | Publication date |
---|---|
JPS6033286B2 (en) | 1985-08-02 |
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