JPS5548833A - Magnetic recording media - Google Patents
Magnetic recording mediaInfo
- Publication number
- JPS5548833A JPS5548833A JP12303778A JP12303778A JPS5548833A JP S5548833 A JPS5548833 A JP S5548833A JP 12303778 A JP12303778 A JP 12303778A JP 12303778 A JP12303778 A JP 12303778A JP S5548833 A JPS5548833 A JP S5548833A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- powder
- magnetic
- scattered
- transforming
- 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 increase the copying and erasing characteristics by lowering the surface electric resistance through the use of mixture of magnetic powder transforming the surface of needle iron oxide magnetic powder with Co and magnetic powder transforming the surface of the said magnetic powder with Co and ferric oxide.
CONSTITUTION: The magnetic powder obtained with partial reduction of γ-Fe2O3 powder, coercive force 330 Oe, saturation magnetization 74emu/g, and particle diameter about 0.3μ for example, under hydrogen gas flow, is scattered in NaOH solution with cobalt sulfate, and the magnetic powder is picked up after treating at 100°C. The magnetic powder 40W80wt% including Co and the said γ-Fe2O3 powder are scattered in NaOH solution with cobalt sulfate and ferrous sulfate for the surface layer obtained from water cleaning and drying from the said powder. The magnetic paint including the mixture magnetic powder with the magnetic powder 60W20wt% formed with Co and ferric oxide for the surface obtained with similar treatment as the said surface, is painted on tape material to obtain magnetic tape. Thus, various electromagnetic conversion characteristics can be increased.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12303778A JPS5548833A (en) | 1978-10-04 | 1978-10-04 | Magnetic recording media |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12303778A JPS5548833A (en) | 1978-10-04 | 1978-10-04 | Magnetic recording media |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5548833A true JPS5548833A (en) | 1980-04-08 |
Family
ID=14850639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12303778A Pending JPS5548833A (en) | 1978-10-04 | 1978-10-04 | Magnetic recording media |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548833A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6371799A (en) * | 1986-09-13 | 1988-04-01 | 松下電工株式会社 | Crime prevention alarm |
-
1978
- 1978-10-04 JP JP12303778A patent/JPS5548833A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6371799A (en) * | 1986-09-13 | 1988-04-01 | 松下電工株式会社 | Crime prevention alarm |
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