JPS56203A - Manufacture of alloy magnetic powder composed primarily of metallic iron or iron - Google Patents
Manufacture of alloy magnetic powder composed primarily of metallic iron or ironInfo
- Publication number
- JPS56203A JPS56203A JP7730179A JP7730179A JPS56203A JP S56203 A JPS56203 A JP S56203A JP 7730179 A JP7730179 A JP 7730179A JP 7730179 A JP7730179 A JP 7730179A JP S56203 A JPS56203 A JP S56203A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- particles
- magnetic powder
- alloy
- manufacture
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract 8
- 229910052742 iron Inorganic materials 0.000 title abstract 4
- 239000006247 magnetic powder Substances 0.000 title abstract 3
- 229910045601 alloy Inorganic materials 0.000 title abstract 2
- 239000000956 alloy Substances 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 10
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 2
- -1 etc. Inorganic materials 0.000 abstract 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 229910001111 Fine metal Inorganic materials 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 abstract 1
- 239000002923 metal particle Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- 229910006540 α-FeOOH Inorganic materials 0.000 abstract 1
Landscapes
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To manufacture a metal magnetic powder having excellent magnetic characteristics on a stable basis by a procedure in which the surface of an alloy magnetic powder composed primarily of metallic iron or iron, as a magnetic recording medium, is coated with Fe3O4 and then the surface of the Fe3O4 is further coated with Fe2O3.
CONSTITUTION: The fine particles of a Fe-alloy oxide containing an iron oxide, e.g., needlelike alpha-FeOOH, etc., or a metal element, e.g., Co, etc., are reduced at 150W700°C in an atmosphere of hydrogen gas, together with water vapor [in an amount such as to produce a water vapor partial pressure (PH2O/PH2) of 10W100%], in a retort in order to form Fe3O4 film on the surface of the Fe-alloy particles. Then, the particles are treated at a temperature of 100°C or less in an oxygen- containing gas, e.g., air, etc., to oxidize the surface portion of the Fe3O4 film to stable Fe2O3. Thus, fine metal particles for magnetic recording medium, having a high saturated magnetization rate because of the Fe3O4 and without the danger of explosively developed oxidation by air, can be stably manufactured.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54077301A JPS5852522B2 (en) | 1979-06-18 | 1979-06-18 | Production method of metallic iron or alloy magnetic powder mainly composed of iron |
| US06/157,115 US4318735A (en) | 1979-06-18 | 1980-06-06 | Process for preparing magnetic particles with metallic region therein, and magnetic particles prepared by the process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54077301A JPS5852522B2 (en) | 1979-06-18 | 1979-06-18 | Production method of metallic iron or alloy magnetic powder mainly composed of iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56203A true JPS56203A (en) | 1981-01-06 |
| JPS5852522B2 JPS5852522B2 (en) | 1983-11-24 |
Family
ID=13630071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54077301A Expired JPS5852522B2 (en) | 1979-06-18 | 1979-06-18 | Production method of metallic iron or alloy magnetic powder mainly composed of iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5852522B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0239504A (en) * | 1988-07-29 | 1990-02-08 | Ishihara Sangyo Kaisha Ltd | Manufacture of metallic magnetic powder for magnetic record |
| JPH0258809A (en) * | 1988-08-24 | 1990-02-28 | Dowa Mining Co Ltd | Manufacture of metallic magnetic powder for magnetic recording medium |
| EP3542895A1 (en) | 2015-04-29 | 2019-09-25 | SCW Systems B.V. | Apparatus for and method of processing a slurry containing organic components |
-
1979
- 1979-06-18 JP JP54077301A patent/JPS5852522B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0239504A (en) * | 1988-07-29 | 1990-02-08 | Ishihara Sangyo Kaisha Ltd | Manufacture of metallic magnetic powder for magnetic record |
| JPH0258809A (en) * | 1988-08-24 | 1990-02-28 | Dowa Mining Co Ltd | Manufacture of metallic magnetic powder for magnetic recording medium |
| EP3542895A1 (en) | 2015-04-29 | 2019-09-25 | SCW Systems B.V. | Apparatus for and method of processing a slurry containing organic components |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5852522B2 (en) | 1983-11-24 |
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