JPS5630707A - Manufacture of ferromagnetic metal powder, ferromagnetic metal powder and magnetic recording medium - Google Patents
Manufacture of ferromagnetic metal powder, ferromagnetic metal powder and magnetic recording mediumInfo
- Publication number
- JPS5630707A JPS5630707A JP10650779A JP10650779A JPS5630707A JP S5630707 A JPS5630707 A JP S5630707A JP 10650779 A JP10650779 A JP 10650779A JP 10650779 A JP10650779 A JP 10650779A JP S5630707 A JPS5630707 A JP S5630707A
- Authority
- JP
- Japan
- Prior art keywords
- metal powder
- ferromagnetic metal
- prescribed
- powder
- dry
- 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.)
- Granted
Links
- 239000000843 powder Substances 0.000 title abstract 9
- 239000002184 metal Substances 0.000 title abstract 7
- 229910052751 metal Inorganic materials 0.000 title abstract 7
- 230000005294 ferromagnetic effect Effects 0.000 title abstract 6
- 230000005291 magnetic effect Effects 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- 230000006866 deterioration Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- 230000006641 stabilisation Effects 0.000 abstract 2
- 238000011105 stabilization Methods 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000011812 mixed powder Substances 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 150000002978 peroxides Chemical class 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910003145 α-Fe2O3 Inorganic materials 0.000 abstract 1
- 229910006540 α-FeOOH Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/065—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder obtained by a reduction
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Paints Or Removers (AREA)
- Powder Metallurgy (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE:To attempt the stabilization of the ferromagnetic metal powder without deterioration of magnetic characteristics by a method wherein after the ferromagnetic metal powder is obtained by a prescribed dry process, slow oxidation treatment is performed as occasion demands and is treated with a peroxide. CONSTITUTION:Needlelike alpha-FeOOH containing a prescribed quantity of cobalt is heated in air at a prescribed temperature to obtain alpha-Fe2O3 having not high crystallization. The mixed powder is put on a board and is treated with reduction treatment in hydrogen atmosphere to convert into a black powder. The temperature of a furnace is made to be about 80 deg.C, the powder is made to dry in the furnace keeping the rising speed of partial pressure of oxygen not to exceed a prescribed value, and is made to absorb a mixed gas of air and N2. The slow oxidation treatment is performed, and the ferromagnetic metal powder obtained by this treatment is dipped in a prescribed quantity of hydrogen peroxide. The ferromagnetic metal powder obtained by this way is separated by suction filtering process and is made to dry at a prescribed temperature to remove water completely to attempt the stabilization of the metal powder without the deterioration of magnetic characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10650779A JPS5630707A (en) | 1979-08-21 | 1979-08-21 | Manufacture of ferromagnetic metal powder, ferromagnetic metal powder and magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10650779A JPS5630707A (en) | 1979-08-21 | 1979-08-21 | Manufacture of ferromagnetic metal powder, ferromagnetic metal powder and magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5630707A true JPS5630707A (en) | 1981-03-27 |
| JPS6133241B2 JPS6133241B2 (en) | 1986-08-01 |
Family
ID=14435334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10650779A Granted JPS5630707A (en) | 1979-08-21 | 1979-08-21 | Manufacture of ferromagnetic metal powder, ferromagnetic metal powder and magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5630707A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119609A (en) * | 1982-01-11 | 1983-07-16 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS61260423A (en) * | 1985-05-14 | 1986-11-18 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPH03120704A (en) * | 1989-10-03 | 1991-05-22 | Fuji Photo Film Co Ltd | Method for processing ferromagnetic metal powder and magnetic recording medium |
| JPH08329446A (en) * | 1994-10-24 | 1996-12-13 | Fuji Photo Film Co Ltd | Reproducing method of video image |
| WO2011125914A1 (en) * | 2010-03-31 | 2011-10-13 | Ｄｏｗａエレクトロニクス株式会社 | Metallic magnetic powder, process for producing same, magnetic coating composition, and magnetic recording medium |
| JP2015502326A (en) * | 2011-12-22 | 2015-01-22 | セントル ナショナル ドゥ ラ ルシェルシュ シアンティフィック（シー．エヌ．アール．エス．） | Method for preparing magnetic talc composition and magnetic talc composition |
-
1979
- 1979-08-21 JP JP10650779A patent/JPS5630707A/en active Granted
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119609A (en) * | 1982-01-11 | 1983-07-16 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPH0412009B2 (en) * | 1982-01-11 | 1992-03-03 | Fuji Photo Film Co Ltd | |
| JPS61260423A (en) * | 1985-05-14 | 1986-11-18 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPH0435807B2 (en) * | 1985-05-14 | 1992-06-12 | Konishiroku Photo Ind | |
| JPH03120704A (en) * | 1989-10-03 | 1991-05-22 | Fuji Photo Film Co Ltd | Method for processing ferromagnetic metal powder and magnetic recording medium |
| JPH08329446A (en) * | 1994-10-24 | 1996-12-13 | Fuji Photo Film Co Ltd | Reproducing method of video image |
| WO2011125914A1 (en) * | 2010-03-31 | 2011-10-13 | Ｄｏｗａエレクトロニクス株式会社 | Metallic magnetic powder, process for producing same, magnetic coating composition, and magnetic recording medium |
| JP5731483B2 (en) * | 2010-03-31 | 2015-06-10 | Ｄｏｗａエレクトロニクス株式会社 | Metal magnetic powder and method for producing the same, magnetic paint, and magnetic recording medium |
| EP2555194A4 (en) * | 2010-03-31 | 2016-01-27 | Dowa Electronics Materials Co Ltd | Metallic magnetic powder, process for producing same, magnetic coating composition, and magnetic recording medium |
| US9311947B2 (en) | 2010-03-31 | 2016-04-12 | Dowa Electronics Materials Co., Ltd. | Metal magnetic powder and process for producing the same, magnetic coating material, and magnetic recording medium |
| JP2015502326A (en) * | 2011-12-22 | 2015-01-22 | セントル ナショナル ドゥ ラ ルシェルシュ シアンティフィック（シー．エヌ．アール．エス．） | Method for preparing magnetic talc composition and magnetic talc composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6133241B2 (en) | 1986-08-01 |
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