JPS6439302A - Production of magnetized iron powder - Google Patents
Production of magnetized iron powderInfo
- Publication number
- JPS6439302A JPS6439302A JP62194422A JP19442287A JPS6439302A JP S6439302 A JPS6439302 A JP S6439302A JP 62194422 A JP62194422 A JP 62194422A JP 19442287 A JP19442287 A JP 19442287A JP S6439302 A JPS6439302 A JP S6439302A
- Authority
- JP
- Japan
- Prior art keywords
- iron powder
- gas
- magnetized iron
- steam
- magnetized
- 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
- Powder Metallurgy (AREA)
Abstract
PURPOSE:To prevent deterioration of organic solvent at the time of producing a magnetic recording medium and to produce magnetized iron powder without any change of surface characteristic by treating the metal powder with gas containing steam after surface-oxidizing the metal powder containing iron as main component. CONSTITUTION:The surface oxidizing treatment is executed to the metal powder containing Fe as the main component produced by dry type reduction method under inert gas atmosphere containing oxygen gas. Next, the magnetized iron powder is produced by bringing into contact with gas of nitrogen gas, etc., containing the steam. It is desirable that steam partial pressure of the gas containing the steam is at about 0.01-10% and the treating temp. is at <=about 100 deg.C. Further, moisture content in the magnetized iron powder after treatment is desirable to be at <about 1%. The obtd. magnetized iron powder has non-active surface and excellent stability even in the organic solvent. This magnetized iron powder is suitable to produce magnetized coating for the magnetic recording medium.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194422A JPS6439302A (en) | 1987-08-05 | 1987-08-05 | Production of magnetized iron powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194422A JPS6439302A (en) | 1987-08-05 | 1987-08-05 | Production of magnetized iron powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439302A true JPS6439302A (en) | 1989-02-09 |
Family
ID=16324342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62194422A Pending JPS6439302A (en) | 1987-08-05 | 1987-08-05 | Production of magnetized iron powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439302A (en) |
-
1987
- 1987-08-05 JP JP62194422A patent/JPS6439302A/en active Pending
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