JPS5613409A - Manufacture of ferromagnetic alloy powder - Google Patents
Manufacture of ferromagnetic alloy powderInfo
- Publication number
- JPS5613409A JPS5613409A JP8611379A JP8611379A JPS5613409A JP S5613409 A JPS5613409 A JP S5613409A JP 8611379 A JP8611379 A JP 8611379A JP 8611379 A JP8611379 A JP 8611379A JP S5613409 A JPS5613409 A JP S5613409A
- Authority
- JP
- Japan
- Prior art keywords
- needle
- shaped
- manufacture
- alloy powder
- iron oxide
- 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.)
- Pending
Links
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To manufacture alloy powder having high reluctivity and high saturated magnetization without using intricated washing process unlike conventional method, by dispersing needle-shaped iron oxide powder in a suspension contg. slightly water- soluble cobalt salt, by heat-treating and reducing the dispersion.
CONSTITUTION: Iron oxide powder, for example needle-shaped γ-Fe2O3, needle- shaped Fe3O4 etc., is diffused in a suspension contg. slightly water-soluble cobalt salts, e.g., cobalt carbonate, cobalt oxalate etc., so as to be mixed. The mixture is then dehydrated and heat-treated at about 500W700°C temp. and is dry reduced with hydrogen. This method permits to eliminate washing process because no water soluble cobalt salt is used unlike in conventional method, and allows to manufacture ferromagnetic alloy powder of needle-shaped crystals having high reluctivity by simplified process.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8611379A JPS5613409A (en) | 1979-07-06 | 1979-07-06 | Manufacture of ferromagnetic alloy powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8611379A JPS5613409A (en) | 1979-07-06 | 1979-07-06 | Manufacture of ferromagnetic alloy powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5613409A true JPS5613409A (en) | 1981-02-09 |
Family
ID=13877635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8611379A Pending JPS5613409A (en) | 1979-07-06 | 1979-07-06 | Manufacture of ferromagnetic alloy powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5613409A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57113202A (en) * | 1981-01-05 | 1982-07-14 | Mitsui Toatsu Chem Inc | Manufacture of acicular ultrafine particle of iron oxyhydroxide |
JPH01257309A (en) * | 1988-04-07 | 1989-10-13 | Tdk Corp | Magnetic powder for magnetic recording medium and manufacture thereof |
JPH0218422U (en) * | 1988-07-22 | 1990-02-07 |
-
1979
- 1979-07-06 JP JP8611379A patent/JPS5613409A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57113202A (en) * | 1981-01-05 | 1982-07-14 | Mitsui Toatsu Chem Inc | Manufacture of acicular ultrafine particle of iron oxyhydroxide |
JPH0340485B2 (en) * | 1981-01-05 | 1991-06-19 | ||
JPH01257309A (en) * | 1988-04-07 | 1989-10-13 | Tdk Corp | Magnetic powder for magnetic recording medium and manufacture thereof |
JPH0218422U (en) * | 1988-07-22 | 1990-02-07 |
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