JPS56166310A - Manufacture of needlelike iron-base ferromagnetic metallic powder - Google Patents
Manufacture of needlelike iron-base ferromagnetic metallic powderInfo
- Publication number
- JPS56166310A JPS56166310A JP6793880A JP6793880A JPS56166310A JP S56166310 A JPS56166310 A JP S56166310A JP 6793880 A JP6793880 A JP 6793880A JP 6793880 A JP6793880 A JP 6793880A JP S56166310 A JPS56166310 A JP S56166310A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- needlelike
- ferromagnetic metallic
- metallic powder
- powder
- 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
Abstract
PURPOSE: To obtain needlelike iron-base ferromagnetic metallic powder with high coercive force and high squareness by sticking a tungstic acid compound to needlelike iron oxyhydroxide or oxide powder and heat reducing the powder to prevent a decrease of the sintering and reducing speeds of the particles.
CONSTITUTION: Needlelike iron oxyhydroxide or oxide powder is suspended in an aqueous soln. of a tungstic acid compound such as ammonium metatungstate and dispersed with stirring to stick the tungstic acid compound to the surfaces of the iron compound particles. The particles are then filtered and dried. The amount of the stuck compound is about 0.01W5% as (W/Fe+W)×100%. By this method needlelike iron-base ferromagnetic metallic powder useful as a powdered material for magnetic recording is obtd. economically.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55067938A JPS5919164B2 (en) | 1980-05-23 | 1980-05-23 | Manufacturing method of acicular iron-based ferromagnetic metal powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55067938A JPS5919164B2 (en) | 1980-05-23 | 1980-05-23 | Manufacturing method of acicular iron-based ferromagnetic metal powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56166310A true JPS56166310A (en) | 1981-12-21 |
JPS5919164B2 JPS5919164B2 (en) | 1984-05-02 |
Family
ID=13359363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55067938A Expired JPS5919164B2 (en) | 1980-05-23 | 1980-05-23 | Manufacturing method of acicular iron-based ferromagnetic metal powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5919164B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58176902A (en) * | 1982-04-09 | 1983-10-17 | Sony Corp | Manufacture of magnetic powder |
WO1995032510A1 (en) * | 1994-05-24 | 1995-11-30 | Daikin Industries, Ltd. | Fine coated particle, process for producing the same, and use thereof |
-
1980
- 1980-05-23 JP JP55067938A patent/JPS5919164B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58176902A (en) * | 1982-04-09 | 1983-10-17 | Sony Corp | Manufacture of magnetic powder |
WO1995032510A1 (en) * | 1994-05-24 | 1995-11-30 | Daikin Industries, Ltd. | Fine coated particle, process for producing the same, and use thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS5919164B2 (en) | 1984-05-02 |
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