JPS55127003A - Manufacturing of magnetic powder with high coercive force - Google Patents
Manufacturing of magnetic powder with high coercive forceInfo
- Publication number
- JPS55127003A JPS55127003A JP3429579A JP3429579A JPS55127003A JP S55127003 A JPS55127003 A JP S55127003A JP 3429579 A JP3429579 A JP 3429579A JP 3429579 A JP3429579 A JP 3429579A JP S55127003 A JPS55127003 A JP S55127003A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- coercive force
- high coercive
- magnetic
- magnetic powder
- 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.)
- Pending
Links
Abstract
PURPOSE: To obtain magnetic powder with high coercive force superior in stability and suitable for a magnetic recording medium by using the mixed powder of γ- Fe2O3 and Fe3O4 as iron oxide powder when composing magnetic powder with high coercive force.
CONSTITUTION: When magnetic powder with high coercive force and superior magnetic stability is composed by forming a compound including Co as main ingredient on a surface layer of ferromagnetic iron oxide powder, the mixture of γ-Fe2O3 powder and a small amount of Fe3O4 powder is used as starting material. In such a manner, two kinds of ferromagnetic oxides are used in combination, so that it becomes possible to obtain magnetic powder with high coercive force, which is superior in stability against thermal change and durability against the repeated use, and suitable for a magnetic recording medium as a result of the above combination effect.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3429579A JPS55127003A (en) | 1979-03-26 | 1979-03-26 | Manufacturing of magnetic powder with high coercive force |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3429579A JPS55127003A (en) | 1979-03-26 | 1979-03-26 | Manufacturing of magnetic powder with high coercive force |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55127003A true JPS55127003A (en) | 1980-10-01 |
Family
ID=12410159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3429579A Pending JPS55127003A (en) | 1979-03-26 | 1979-03-26 | Manufacturing of magnetic powder with high coercive force |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55127003A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60170028A (en) * | 1984-02-14 | 1985-09-03 | Tdk Corp | Magnetic recording medium |
-
1979
- 1979-03-26 JP JP3429579A patent/JPS55127003A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60170028A (en) * | 1984-02-14 | 1985-09-03 | Tdk Corp | Magnetic recording medium |
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