JPS5719301A - Modifying method of ferromagnetic metallic powder - Google Patents
Modifying method of ferromagnetic metallic powderInfo
- Publication number
- JPS5719301A JPS5719301A JP9265480A JP9265480A JPS5719301A JP S5719301 A JPS5719301 A JP S5719301A JP 9265480 A JP9265480 A JP 9265480A JP 9265480 A JP9265480 A JP 9265480A JP S5719301 A JPS5719301 A JP S5719301A
- Authority
- JP
- Japan
- Prior art keywords
- metallic powder
- contact
- gas
- ferromagnetic
- obtd
- 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 7
- 230000005294 ferromagnetic effect Effects 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 3
- 239000007789 gas Substances 0.000 abstract 3
- 239000011261 inert gas Substances 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000008246 gaseous mixture Substances 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
Landscapes
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To simplify operation control compared with an oxidation method using O2 and to form an oxidized film on a ferromagnetic metallic powder safely and in a short time by bringing said metallic powder into contact with gaseous mixture of inert gases and steam at a prescribed temp.
CONSTITUTION: A ferromagnetic metallic powder which is obtd. by heat decomposition of org. acid salt of said ferromagnetic metal and reduction by reducing gas such as H2 is treated in a following way. Namely, said metallic powder is allowed to contact with a gas which is obtd. by mixing inert gas of ≥1 kinds of N2, rare gas, CO2 with 500W5,000vol. ppm steam. In this case, contacting is performed by using bed, fluid bed or the like and its contact temp. is regulated to 150W300°. As a result, formation time of oxidized film for the metallic powder is shortened remarkably to about 30minW6hr compared with a conventional method. Then danger of mixing O2 to H2 using is producing the magnetic metallic powder by erroneous operation is eliminated, and therefore this method is advantageous in prevention of disasters.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9265480A JPS5719301A (en) | 1980-07-09 | 1980-07-09 | Modifying method of ferromagnetic metallic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9265480A JPS5719301A (en) | 1980-07-09 | 1980-07-09 | Modifying method of ferromagnetic metallic powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5719301A true JPS5719301A (en) | 1982-02-01 |
| JPS6136044B2 JPS6136044B2 (en) | 1986-08-16 |
Family
ID=14060449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9265480A Granted JPS5719301A (en) | 1980-07-09 | 1980-07-09 | Modifying method of ferromagnetic metallic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5719301A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62156201A (en) * | 1985-12-27 | 1987-07-11 | Mitsui Toatsu Chem Inc | Ferromagnetic metallic powder treated with carbon dioxide |
| JPS6343303A (en) * | 1986-08-11 | 1988-02-24 | Mitsui Toatsu Chem Inc | Preserving method for ferromagnetic metal powder |
| JPH02303006A (en) * | 1989-05-17 | 1990-12-17 | Kao Corp | Manufacture of ferromagnetic metallic powder |
| US5003919A (en) * | 1987-02-12 | 1991-04-02 | Chisso Corporation | Apparatus for stabilization treatment of ferromagnetic metal powder |
| US5735969A (en) * | 1996-03-07 | 1998-04-07 | Imation Corp. | Method of producing acicular magnetic alloy particles |
-
1980
- 1980-07-09 JP JP9265480A patent/JPS5719301A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62156201A (en) * | 1985-12-27 | 1987-07-11 | Mitsui Toatsu Chem Inc | Ferromagnetic metallic powder treated with carbon dioxide |
| JPS6343303A (en) * | 1986-08-11 | 1988-02-24 | Mitsui Toatsu Chem Inc | Preserving method for ferromagnetic metal powder |
| US5003919A (en) * | 1987-02-12 | 1991-04-02 | Chisso Corporation | Apparatus for stabilization treatment of ferromagnetic metal powder |
| JPH02303006A (en) * | 1989-05-17 | 1990-12-17 | Kao Corp | Manufacture of ferromagnetic metallic powder |
| US5735969A (en) * | 1996-03-07 | 1998-04-07 | Imation Corp. | Method of producing acicular magnetic alloy particles |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6136044B2 (en) | 1986-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5317566A (en) | Denitration method for of exhaust gas | |
| JPS5719301A (en) | Modifying method of ferromagnetic metallic powder | |
| JPS56501565A (en) | ||
| ES472199A1 (en) | Removal of contaminant oxides from gas mixtures | |
| JPS5725386A (en) | Carbon deposition-preventing apparatus | |
| JPS5259103A (en) | Process for preparation of tetrachloroalkane | |
| JPS5320769A (en) | Plasma etching method of metal electrodes | |
| JPS5489994A (en) | Ferromagnetic activated carbon forming method | |
| JPS51143570A (en) | A method for reduction of nitrogen oxides in exhaust gas | |
| JPS565910A (en) | Dephosphorizing method of pig iron containing chromium | |
| JPS5269902A (en) | Prevention of spontaneous heat evolution of heaped coal | |
| JPS579803A (en) | Sintering method | |
| JPS5256077A (en) | Process of oxidation at low temperature | |
| JPS51128676A (en) | A method of treating gas containing nitrogen oxides | |
| JPS5637089A (en) | Treating method for water | |
| JPS5232874A (en) | Treating method of waste fluid | |
| JPS5567335A (en) | Regeneration of oxidizing catalyst | |
| JPS5229495A (en) | Process for oxidizing nitrogen monoxide | |
| JPS527864A (en) | Method for treatment of waste gas containing nitrogen oxides | |
| JPS5249973A (en) | Decreasing method of nox in boilr exhaust gas | |
| JPS5795803A (en) | Production of hydrogen | |
| JPS5342477A (en) | Process for treating electrode component of bulb | |
| JPS56130467A (en) | Gas nitriding method for manganese-containing steel product | |
| JPS5317567A (en) | Treating method for exhaust gas containing nitrogen oxides and sulfur oxides by use of catalist unit wit electrodeposited manganese oxide | |
| JPS55152528A (en) | Removal of nitrogen oxides in waste gas |