JPS5539661A - Magnetic metallic powder for magnetic recording and its manufacturing - Google Patents
Magnetic metallic powder for magnetic recording and its manufacturingInfo
- Publication number
- JPS5539661A JPS5539661A JP11282578A JP11282578A JPS5539661A JP S5539661 A JPS5539661 A JP S5539661A JP 11282578 A JP11282578 A JP 11282578A JP 11282578 A JP11282578 A JP 11282578A JP S5539661 A JPS5539661 A JP S5539661A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic
- solution
- oil
- phosphazene
- 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 powder by organic solvent containing silicone oil and polyphosphazene and covering the powder surface with oil and phosphazene by the evaporating treatment of solvent in non-oxidizing gas.
CONSTITUTION: A small amount of polyphoshpazene as shown in the righthand formula and silicone oil, is dissolved in ethanol to adjust the solution and then magnetic metallic powder having such magnetic characteristics like particle diameter of 0.3μm, axis ratio of 7, saturated magnetizing amount of 160emu/g and coercive force of 1080oersted, is charged in abovementioned solution and then filtrated. Next, the solution is heated at 150°C in the nitrogen gas atmosphere during 6hours in such a way that ethanol is evaporated and phosphazene and oil are attached in the powder surface. By doing so, the maintemence ratio of saturated magnetizing amount and max. residual flux density even when leaving in the air, is reduced a little.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11282578A JPS5539661A (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 |
|---|---|---|---|
| JP11282578A JPS5539661A (en) | 1978-09-12 | 1978-09-12 | Magnetic metallic powder for magnetic recording and its manufacturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5539661A true JPS5539661A (en) | 1980-03-19 |
Family
ID=14596468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11282578A Pending JPS5539661A (en) | 1978-09-12 | 1978-09-12 | Magnetic metallic powder for magnetic recording and its manufacturing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5539661A (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 |
| EP0440570A1 (en) * | 1990-02-02 | 1991-08-07 | PECHINEY RECHERCHE (Groupement d'Intérêt Economique régi par l'Ordonnance du 23 Septembre 1967) Immeuble Balzac | Process for sintering powders of metals, metal alloys, ceramics or cermets |
| US5587217A (en) * | 1994-07-01 | 1996-12-24 | Hmt Technology Corporation | Lubricant composition and method |
-
1978
- 1978-09-12 JP JP11282578A patent/JPS5539661A/en active Pending
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 |
| EP0440570A1 (en) * | 1990-02-02 | 1991-08-07 | PECHINEY RECHERCHE (Groupement d'Intérêt Economique régi par l'Ordonnance du 23 Septembre 1967) Immeuble Balzac | Process for sintering powders of metals, metal alloys, ceramics or cermets |
| US5587217A (en) * | 1994-07-01 | 1996-12-24 | Hmt Technology Corporation | Lubricant composition and method |
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