JPS5485200A - Production of ferromagnetic powder - Google Patents
Production of ferromagnetic powderInfo
- Publication number
- JPS5485200A JPS5485200A JP15374777A JP15374777A JPS5485200A JP S5485200 A JPS5485200 A JP S5485200A JP 15374777 A JP15374777 A JP 15374777A JP 15374777 A JP15374777 A JP 15374777A JP S5485200 A JPS5485200 A JP S5485200A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- iron oxide
- ether
- magnetic powder
- cocl
- 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
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain Co-contg. iron oxide ferromagnetic powder for recording of magnetic recording media by dispersing iron oxide magnetic powder in a soln. of CoCl2 in a high b.p. ether such as diethylene glycol monoethyl ether, followed by heating.
CONSTITUTION: Iron oxide magnetic powder such as needle-like γ-Fe2O3 powder is dispersed in a soln. of CoCl2 in a high b.p. ether such as diethylene glycol monoethyl ether, followed by heat treatment at 160W250, pref. 180W200°C. Thus, modified magnetic powder is obtd. having a uniform shape, high coercive force and good dispersibility.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15374777A JPS5485200A (en) | 1977-12-20 | 1977-12-20 | Production of ferromagnetic powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15374777A JPS5485200A (en) | 1977-12-20 | 1977-12-20 | Production of ferromagnetic powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5485200A true JPS5485200A (en) | 1979-07-06 |
Family
ID=15569221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15374777A Pending JPS5485200A (en) | 1977-12-20 | 1977-12-20 | Production of ferromagnetic powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5485200A (en) |
-
1977
- 1977-12-20 JP JP15374777A patent/JPS5485200A/en active Pending
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