JPS5539660A - Magnetic metallic powder for magnetic recording and its manufacturing - Google Patents
Magnetic metallic powder for magnetic recording and its manufacturingInfo
- Publication number
- JPS5539660A JPS5539660A JP11282478A JP11282478A JPS5539660A JP S5539660 A JPS5539660 A JP S5539660A JP 11282478 A JP11282478 A JP 11282478A JP 11282478 A JP11282478 A JP 11282478A JP S5539660 A JPS5539660 A JP S5539660A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic
- fatty acid
- silicone oil
- solvent
- 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 provide the high oxidation stability of the magnetic powder by effecting the wetting treatment of the magnetic metallic powder with organic solvent containing silicone oil and fatty acid and covering the powder surface with the oil and fatty acid evaporizing the solvent in a non-oxidizing gas.
CONSTITUTION: In the ethanol solution dissolving 0.2% in weight of silicone oil and stearic acid respectively, the metallic magnetic powder having the particle diameter of about 0.3μm, axis ratio of about 7, saturated magnetizing amount of 160emu/g and coercive force of 1080 oersted, is charged to be dispersed and then filtrated. Then, the powder is heated at 150°C in the nitrogen gas atmosphere during 4 hours and the solvent is evaporated and cooled in such a way that the film composing of silicone oil and fatty acid is attached in the powder surface. By doing so, the saturated magnetizing amount when leaving in the air can remarkably reduced and storage stability can be improved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11282478A JPS5539660A (en) | 1978-09-12 | 1978-09-12 | Magnetic metallic powder for magnetic recording and its manufacturing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11282478A JPS5539660A (en) | 1978-09-12 | 1978-09-12 | Magnetic metallic powder for magnetic recording and its manufacturing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5539660A true JPS5539660A (en) | 1980-03-19 |
Family
ID=14596443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11282478A Pending JPS5539660A (en) | 1978-09-12 | 1978-09-12 | Magnetic metallic powder for magnetic recording and its manufacturing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5539660A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4475946A (en) * | 1982-09-08 | 1984-10-09 | Fuji Photo Film Co., Ltd. | Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, Sb and Ag coated with mono- or dialkoxysilanes |
JPS63175160A (en) * | 1987-01-12 | 1988-07-19 | サムエンジニアリング株式会社 | Foam washing machine |
JPH01142488U (en) * | 1988-03-22 | 1989-09-29 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52155398A (en) * | 1976-05-20 | 1977-12-23 | Hitachi Maxell | Metallic magneticcpowder for magnetic recording which has excellent oxidation stability and method of manufacture thereof |
-
1978
- 1978-09-12 JP JP11282478A patent/JPS5539660A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52155398A (en) * | 1976-05-20 | 1977-12-23 | Hitachi Maxell | Metallic magneticcpowder for magnetic recording which has excellent oxidation stability and method of manufacture thereof |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4475946A (en) * | 1982-09-08 | 1984-10-09 | Fuji Photo Film Co., Ltd. | Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, Sb and Ag coated with mono- or dialkoxysilanes |
JPS63175160A (en) * | 1987-01-12 | 1988-07-19 | サムエンジニアリング株式会社 | Foam washing machine |
JPH01142488U (en) * | 1988-03-22 | 1989-09-29 | ||
JPH0339514Y2 (en) * | 1988-03-22 | 1991-08-20 |
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