JPS5785901A - Method for stabilization of metallic magnetic powder - Google Patents
Method for stabilization of metallic magnetic powderInfo
- Publication number
- JPS5785901A JPS5785901A JP55159454A JP15945480A JPS5785901A JP S5785901 A JPS5785901 A JP S5785901A JP 55159454 A JP55159454 A JP 55159454A JP 15945480 A JP15945480 A JP 15945480A JP S5785901 A JPS5785901 A JP S5785901A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- groups
- steam
- powder
- contg
- 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 oxidize the surface of metallic magnetic powder safely and to provide high corrosion resistance by suspending the metallic magnetic powder in an org. solvent having no acidic groups and blowing a gas contg. at least steam into this suspension.
CONSTITUTION: Organic solvent contg. no acidic groups such as carboxy groups, sulfonic acid groups, and nitrate groups, for example, toluene, xylene, etc. are used for suspension and the amt. thereof is about 3W20 times of the weight of the metallic powder. The gas to be blown is an inert gas contg. 0.1W10vol% steam and the content of oxygen is about 1vol%. The flow rate of the gas contg. steam is about 1W200l/min/kg of Fe powder and the reaction temp. is preferably about 50W200°C for applications of magnetic powder for ordinary magnetic tapes. Thereby, the danger of explosion and combustin of the org. solvent are eliminated at all.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55159454A JPS5785901A (en) | 1980-11-14 | 1980-11-14 | Method for stabilization of metallic magnetic powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55159454A JPS5785901A (en) | 1980-11-14 | 1980-11-14 | Method for stabilization of metallic magnetic powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5785901A true JPS5785901A (en) | 1982-05-28 |
Family
ID=15694108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55159454A Pending JPS5785901A (en) | 1980-11-14 | 1980-11-14 | Method for stabilization of metallic magnetic powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5785901A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60174839A (en) * | 1984-02-17 | 1985-09-09 | Taiyo Yuden Co Ltd | Production of magnet consisting of rare earth cobalt |
-
1980
- 1980-11-14 JP JP55159454A patent/JPS5785901A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60174839A (en) * | 1984-02-17 | 1985-09-09 | Taiyo Yuden Co Ltd | Production of magnet consisting of rare earth cobalt |
JPS6312134B2 (en) * | 1984-02-17 | 1988-03-17 | Taiyo Yuden Kk |
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