JPS5655503A - Production of metal magnetic powder of superior corrosion resistance - Google Patents
Production of metal magnetic powder of superior corrosion resistanceInfo
- Publication number
- JPS5655503A JPS5655503A JP12924179A JP12924179A JPS5655503A JP S5655503 A JPS5655503 A JP S5655503A JP 12924179 A JP12924179 A JP 12924179A JP 12924179 A JP12924179 A JP 12924179A JP S5655503 A JPS5655503 A JP S5655503A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- granules
- superior corrosion
- inert gas
- magnetic metal
- 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
- 239000002184 metal Substances 0.000 title abstract 5
- 229910052751 metal Inorganic materials 0.000 title abstract 5
- 230000007797 corrosion Effects 0.000 title abstract 3
- 238000005260 corrosion Methods 0.000 title abstract 3
- 239000006247 magnetic powder Substances 0.000 title abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 8
- 239000000843 powder Substances 0.000 abstract 6
- 229910052742 iron Inorganic materials 0.000 abstract 4
- 239000008187 granular material Substances 0.000 abstract 3
- 239000011261 inert gas Substances 0.000 abstract 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 2
- 229910001882 dioxygen Inorganic materials 0.000 abstract 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
Abstract
PURPOSE: To form an oxide film of superior corrosion resistance by oxidation- treatment of the magnetic metal powder comprising essentially iron or its granules at predetermined temperatures in an inert gas atmosphere.
CONSTITUTION: Magnetic metal powder comprising essentially iron or its granules are subjected to oxidation treatment at ≤200°C reaction temperature in an inert gas atmosphere which contains 100W10,000ppm oxygen gas and is of ≤5,000ppm steam concentration or an evacuated oxygen atmosphere of 10-2W10-4atm, whereby an oxide film is formed on powder particle surfaces. The resulted magnetic powder has passive state composition such as Fe3O4 and exhibits superior corrosion resostance. The magnetic metal powder includes powder of fine needle-like metal iron of about ≤1μ grain sizes and about ≥2 ratio of long axis/short axis and the powder comprising essentially iron and contg. Co, Ni, Cr, etc. or may be granules thereof. In addition, nitrogen gas is suitable for the inert gas mixed with oxygen gas. A fluidized bed apparatus is preferable as the reacting apparatus.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54129241A JPS5914081B2 (en) | 1979-10-05 | 1979-10-05 | Manufacturing method of metal magnetic powder with excellent corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54129241A JPS5914081B2 (en) | 1979-10-05 | 1979-10-05 | Manufacturing method of metal magnetic powder with excellent corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5655503A true JPS5655503A (en) | 1981-05-16 |
| JPS5914081B2 JPS5914081B2 (en) | 1984-04-03 |
Family
ID=15004673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54129241A Expired JPS5914081B2 (en) | 1979-10-05 | 1979-10-05 | Manufacturing method of metal magnetic powder with excellent corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5914081B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155354A (en) * | 1981-03-20 | 1982-09-25 | Hitachi Maxell Ltd | Manufacture of ferromagnetic powder |
| JPS58161711A (en) * | 1982-03-16 | 1983-09-26 | Hitachi Maxell Ltd | Production of magnetic metallic powder |
| JPS5959801A (en) * | 1982-09-28 | 1984-04-05 | Kanto Denka Kogyo Kk | Method for stabilizing metallic magnetic powder |
| JPS59110701A (en) * | 1982-12-16 | 1984-06-26 | Mitsui Toatsu Chem Inc | Stabilization of reduced iron powder for magnetic recording |
| JPS59207024A (en) * | 1983-05-10 | 1984-11-24 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPH0239504A (en) * | 1988-07-29 | 1990-02-08 | Ishihara Sangyo Kaisha Ltd | Manufacture of metallic magnetic powder for magnetic record |
| JPH02168415A (en) * | 1989-04-10 | 1990-06-28 | Konica Corp | Magnetic recording medium |
| US6827757B2 (en) | 2001-11-30 | 2004-12-07 | Jfe Steel Corporation | Magnetite-iron based composite powder, magnetite-iron based powder mixture, method for producing the same, method for remedying polluted soil, water or gases and electromagnetic wave absorber |
| WO2007119393A1 (en) | 2006-03-16 | 2007-10-25 | Matsushita Electric Industrial Co., Ltd. | Radial anisotropic magnet manufacturing method, permanent magnet motor using radial anisotropic magnet, iron core-equipped permanent magnet motor |
| EP2226814A1 (en) | 2009-02-27 | 2010-09-08 | MINEBEA Co., Ltd. | Rare-earth iron -based magnet with self-recoverability |
| DE102010037838A1 (en) | 2009-09-29 | 2011-03-31 | Minebea Co., Ltd. | Anisotropic resin bonded magnet based on rare earth iron |
| JP2016096289A (en) * | 2014-11-17 | 2016-05-26 | Tdk株式会社 | Film-forming type iron nitride based magnetic powder and magnet using the same |
| JP2018195802A (en) * | 2017-05-16 | 2018-12-06 | 株式会社デンソー | Magnetic powder and magnet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4879153A (en) * | 1971-12-30 | 1973-10-24 |
-
1979
- 1979-10-05 JP JP54129241A patent/JPS5914081B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4879153A (en) * | 1971-12-30 | 1973-10-24 |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155354A (en) * | 1981-03-20 | 1982-09-25 | Hitachi Maxell Ltd | Manufacture of ferromagnetic powder |
| JPH0470363B2 (en) * | 1982-03-16 | 1992-11-10 | Hitachi Maxell | |
| JPS58161711A (en) * | 1982-03-16 | 1983-09-26 | Hitachi Maxell Ltd | Production of magnetic metallic powder |
| JPS5959801A (en) * | 1982-09-28 | 1984-04-05 | Kanto Denka Kogyo Kk | Method for stabilizing metallic magnetic powder |
| JPH0219161B2 (en) * | 1982-09-28 | 1990-04-27 | Kanto Denka Kogyo Kk | |
| JPS59110701A (en) * | 1982-12-16 | 1984-06-26 | Mitsui Toatsu Chem Inc | Stabilization of reduced iron powder for magnetic recording |
| JPS59207024A (en) * | 1983-05-10 | 1984-11-24 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
| JPS6322366B2 (en) * | 1983-05-10 | 1988-05-11 | Konika Kk | |
| JPH0239504A (en) * | 1988-07-29 | 1990-02-08 | Ishihara Sangyo Kaisha Ltd | Manufacture of metallic magnetic powder for magnetic record |
| JPH02168415A (en) * | 1989-04-10 | 1990-06-28 | Konica Corp | Magnetic recording medium |
| US6827757B2 (en) | 2001-11-30 | 2004-12-07 | Jfe Steel Corporation | Magnetite-iron based composite powder, magnetite-iron based powder mixture, method for producing the same, method for remedying polluted soil, water or gases and electromagnetic wave absorber |
| WO2007119393A1 (en) | 2006-03-16 | 2007-10-25 | Matsushita Electric Industrial Co., Ltd. | Radial anisotropic magnet manufacturing method, permanent magnet motor using radial anisotropic magnet, iron core-equipped permanent magnet motor |
| US8072109B2 (en) | 2006-03-16 | 2011-12-06 | Panasonic Corporation | Radial anisotropic magnet manufacturing method, permanent magnet motor using radial anisotropic magnet, and iron core-equipped permanent magnet motor |
| US8183732B2 (en) | 2006-03-16 | 2012-05-22 | Panasonic Corporation | Radial anisotropic magnet manufacturing method, permanent magnet motor using radial anisotropic magnet, and iron core-equipped permanent magnet motor |
| EP2226814A1 (en) | 2009-02-27 | 2010-09-08 | MINEBEA Co., Ltd. | Rare-earth iron -based magnet with self-recoverability |
| DE102010037838A1 (en) | 2009-09-29 | 2011-03-31 | Minebea Co., Ltd. | Anisotropic resin bonded magnet based on rare earth iron |
| US8329056B2 (en) | 2009-09-29 | 2012-12-11 | Minebea Co., Ltd. | Anisotropic rare earth-iron based resin bonded magnet |
| JP2016096289A (en) * | 2014-11-17 | 2016-05-26 | Tdk株式会社 | Film-forming type iron nitride based magnetic powder and magnet using the same |
| JP2018195802A (en) * | 2017-05-16 | 2018-12-06 | 株式会社デンソー | Magnetic powder and magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5914081B2 (en) | 1984-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5655503A (en) | Production of metal magnetic powder of superior corrosion resistance | |
| JPS55154322A (en) | Manufacture of iron oxide | |
| US4420330A (en) | Stabilization of pyrophoric ferromagnetic acicular metal particles consisting essentially of iron | |
| US4073977A (en) | Stabilization of pyrophoric metal powders with alkylene oxide polymers | |
| GB1198650A (en) | Passivation of Ferrous Metals. | |
| GB1496890A (en) | Manufacture of magnetic materials which exhibit exchange anisotropy | |
| US2656595A (en) | Chromium-alloyed corrosion-resist | |
| JPS57164958A (en) | Manufacture of sintered high-alloy steel | |
| GB2058845A (en) | Method of producing fine metal particles | |
| GB1280073A (en) | Improvements in or relating to catalysts | |
| JPS5673408A (en) | Magnetic powder for magnetic recording and magnetic tape employing that magnetic powder | |
| ATE74038T1 (en) | PROCESS FOR THE PRODUCTION OF IRON POWDER SUITABLE FOR POWDER METALLURGY FROM FINE IRON OXIDE POWDER BY REDUCTION WITH HOT GASES. | |
| Murthy et al. | Synthesis and sintering of active manganese (II) zinc ferrite powders. | |
| US3956151A (en) | Method for producing a ferromagnetic chromium oxide | |
| JPS5852522B2 (en) | Production method of metallic iron or alloy magnetic powder mainly composed of iron | |
| JPS5672142A (en) | Manufacture of magnesium alloy | |
| US3582316A (en) | Process for storing partially oxidized lead powders | |
| JPS5544567A (en) | Production of sintered parts | |
| Barshchevskaya et al. | Process of coreduction of iron and chromium oxides with hydrogen: I. Process kinetics | |
| JPS56150154A (en) | Preparation of sintered steel | |
| JPS57116709A (en) | Manufacture of metallic magnetic powder | |
| JPS55154506A (en) | Production of metal magnetic material particle | |
| Salak et al. | The Effect of Recrystallization Annealing on Structural and Technological Properties of the Hametah Iron Powder | |
| JPS5562705A (en) | Magnet and its preparation | |
| JPS5616604A (en) | Manufacture of ferromagnetic iron-cobalt alloy powder |