JPS5525854A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5525854A JPS5525854A JP9849878A JP9849878A JPS5525854A JP S5525854 A JPS5525854 A JP S5525854A JP 9849878 A JP9849878 A JP 9849878A JP 9849878 A JP9849878 A JP 9849878A JP S5525854 A JPS5525854 A JP S5525854A
- Authority
- JP
- Japan
- Prior art keywords
- iron oxide
- powder
- magnetic
- oxide powder
- weight
- 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
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To obtain the excellent electromagnetic conversion property as well as to reduce the electrification property by using together both the iron oxide magnetic powder containing Co and the magnetic iron oxide powder containing the bivalent ion.
CONSTITUTION: The γ-Fe203 powder is diffused into the aqueous solution containing Co salt and its equivalent alkali and the treated at the temperature lower than the boilding point of the dispersion solution. Thus the Co-containing iron oxide layer is formed on the iron oxide powder. Then the mixture magnetic powder composed of 70W97 parts by weight of the Co-containing iron oxide powder and 3W30 parts by weight of the magnetic iron oxide powder which contains over 0.05 of the bivalent Fe in the powder particle and in the form of Fe2+/Fe3+ and features a low intrinsic electric resistance is coated on the substrate along with the bonding agent.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9849878A JPS5525854A (en) | 1978-08-11 | 1978-08-11 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9849878A JPS5525854A (en) | 1978-08-11 | 1978-08-11 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5525854A true JPS5525854A (en) | 1980-02-23 |
Family
ID=14221297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9849878A Pending JPS5525854A (en) | 1978-08-11 | 1978-08-11 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5525854A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57110256A (en) * | 1980-12-28 | 1982-07-09 | Terumo Corp | Porous hollow yarn type artificial lung |
-
1978
- 1978-08-11 JP JP9849878A patent/JPS5525854A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57110256A (en) * | 1980-12-28 | 1982-07-09 | Terumo Corp | Porous hollow yarn type artificial lung |
JPS6317465B2 (en) * | 1980-12-28 | 1988-04-13 | Terumo Corp |
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