JPS5690904A - Production of ferromagnetic metal powder - Google Patents
Production of ferromagnetic metal powderInfo
- Publication number
- JPS5690904A JPS5690904A JP16768279A JP16768279A JPS5690904A JP S5690904 A JPS5690904 A JP S5690904A JP 16768279 A JP16768279 A JP 16768279A JP 16768279 A JP16768279 A JP 16768279A JP S5690904 A JPS5690904 A JP S5690904A
- Authority
- JP
- Japan
- Prior art keywords
- reduction
- oxide powder
- reducing
- group
- reducing gas
- 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
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain ferromagnetic metal powder of good needle characteristics by mixing water vapor into a reducing gas in the front half of reducing period in the heating reduction of oxide powder of iron or water-contg. metal oxide powder.
CONSTITUTION: At the time of making heating reduction of oxide powder of iron or water-contg. metal oxide powder with a reducing gas consisting essentially of hydrogen, water vapor is mixed into the reducing gas in the front half of the reduction period in which the rate of reduction is about 75%. Particularly before about 30% of the rate of reduction is desirable, and the reducing temp. is preferably about 300W500°C, and pressure about 0W100kg/cm2G. If necessary, it is also desirable to use metals of periodic table Ib group, II group and VIII group and α-Fe2O3 or α-FOOH whitch contain one or two or more kinds selected from Sn, Mn, Ti, Si, B, Al, Bi Pb, P, Sb, Cr, Mo, W. Thereby, the metal powder of improved coercive force and square ratio and well shaped particles is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16768279A JPS5690904A (en) | 1979-12-25 | 1979-12-25 | Production of ferromagnetic metal powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16768279A JPS5690904A (en) | 1979-12-25 | 1979-12-25 | Production of ferromagnetic metal powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5690904A true JPS5690904A (en) | 1981-07-23 |
JPS6136048B2 JPS6136048B2 (en) | 1986-08-16 |
Family
ID=15854264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16768279A Granted JPS5690904A (en) | 1979-12-25 | 1979-12-25 | Production of ferromagnetic metal powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5690904A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS596502A (en) * | 1982-07-05 | 1984-01-13 | Mitsui Toatsu Chem Inc | Manufacture of improved ferromagnetic iron powder |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH055200U (en) * | 1991-07-04 | 1993-01-26 | 森平舞台機構株式会社 | The approaching horizontal lifting balancer |
-
1979
- 1979-12-25 JP JP16768279A patent/JPS5690904A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS596502A (en) * | 1982-07-05 | 1984-01-13 | Mitsui Toatsu Chem Inc | Manufacture of improved ferromagnetic iron powder |
JPH0341963B2 (en) * | 1982-07-05 | 1991-06-25 |
Also Published As
Publication number | Publication date |
---|---|
JPS6136048B2 (en) | 1986-08-16 |
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