JPS5539662A - Magnetic metallic powder for magnetic recording and its manufacturing - Google Patents
Magnetic metallic powder for magnetic recording and its manufacturingInfo
- Publication number
- JPS5539662A JPS5539662A JP11282678A JP11282678A JPS5539662A JP S5539662 A JPS5539662 A JP S5539662A JP 11282678 A JP11282678 A JP 11282678A JP 11282678 A JP11282678 A JP 11282678A JP S5539662 A JPS5539662 A JP S5539662A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic
- solution
- ethanol
- polyphosphazene
- 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
- 239000000843 powder Substances 0.000 title abstract 5
- 238000004519 manufacturing process Methods 0.000 title 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 4
- 229920002627 poly(phosphazenes) Polymers 0.000 abstract 2
- 229920006395 saturated elastomer Polymers 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 1
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000006247 magnetic powder Substances 0.000 abstract 1
- GKTNLYAAZKKMTQ-UHFFFAOYSA-N n-[bis(dimethylamino)phosphinimyl]-n-methylmethanamine Chemical compound CN(C)P(=N)(N(C)C)N(C)C GKTNLYAAZKKMTQ-UHFFFAOYSA-N 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229920006267 polyester film Polymers 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
Landscapes
- Paints Or Removers (AREA)
- Powder Metallurgy (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To provide the high oxidation stability of the magnetic powder by effecting the wetting treatment of the powder by organic solvent containing polyphosphazene and covering the powder surface with phosphazene by evaporating treatment of the solvent in non-oxidizing gas.
CONSTITUTION: Polyphosphazene is dissolved in the 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 dispersed here to the abovementioned solution and agitated sufficiently and filtrated. Next, the solution is heated at 150°C in the nitrogen gas atmosphere during 6hours so as to evaporate the ethanol for removal. By doing so, saturated magnetizing amount and max. residual flux density are elevated and that the maintemence ratio even when leaving in the air reduces little. After that, using the powder the magnetic tape composing of polyester film can be made.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11282678A JPS5539662A (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 |
|---|---|---|---|
| JP11282678A JPS5539662A (en) | 1978-09-12 | 1978-09-12 | Magnetic metallic powder for magnetic recording and its manufacturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5539662A true JPS5539662A (en) | 1980-03-19 |
Family
ID=14596495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11282678A Pending JPS5539662A (en) | 1978-09-12 | 1978-09-12 | Magnetic metallic powder for magnetic recording and its manufacturing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5539662A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102240802A (en) * | 2010-05-12 | 2011-11-16 | 亚利桑那大学董事会 | Metallic magnetic powder and manufacturing method of the same, magnetic painting, magnetic powder for magnetic therapy, and magnetic recording medium |
-
1978
- 1978-09-12 JP JP11282678A patent/JPS5539662A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102240802A (en) * | 2010-05-12 | 2011-11-16 | 亚利桑那大学董事会 | Metallic magnetic powder and manufacturing method of the same, magnetic painting, magnetic powder for magnetic therapy, and magnetic recording medium |
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