JPS57116706A - Manufacture of metallic magnetic powder - Google Patents
Manufacture of metallic magnetic powderInfo
- Publication number
- JPS57116706A JPS57116706A JP56002312A JP231281A JPS57116706A JP S57116706 A JPS57116706 A JP S57116706A JP 56002312 A JP56002312 A JP 56002312A JP 231281 A JP231281 A JP 231281A JP S57116706 A JPS57116706 A JP S57116706A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- iron
- under heating
- metallic
- reduction under
- 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 metallic magnetic powder with superior magnetic characteristics by sticking an Si compound to powder of a metallic compound consisting essentially of iron oxyhydroxide or iron oxide, granulating the powder, and carrying out reduction under heating.
CONSTITUTION: An Si compound is stuck to the particle surfaces os powder of a metallic compound consisting essentially of iron oxyhydroxide or iron oxide. The powder is heat treated at 200W1,000°C, granulated, and optionally heat treated at 200W1,000°C. Reduction under heating is then carried out at about 300W600°C in a reducting atmosphere of gaseous hydrogen or the like. By this method the reduction under heating can be caried out sufficiently and uniformly while effectively inhibiting sintering among the gruanules and the particles of the powder and the deformation of the particles. As a reusult, iron-base metallic magnetic powder with superior magnetic characteristics is obtd.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56002312A JPS57116706A (en) | 1981-01-10 | 1981-01-10 | Manufacture of metallic magnetic powder |
US06/337,149 US4400337A (en) | 1981-01-10 | 1982-01-05 | Method for production of metal magnetic particles |
EP82100091A EP0056257B1 (en) | 1981-01-10 | 1982-01-08 | Method for production of metal magnetic particles |
DE8282100091T DE3261979D1 (en) | 1981-01-10 | 1982-01-08 | Method for production of metal magnetic particles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56002312A JPS57116706A (en) | 1981-01-10 | 1981-01-10 | Manufacture of metallic magnetic powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57116706A true JPS57116706A (en) | 1982-07-20 |
JPH0152441B2 JPH0152441B2 (en) | 1989-11-08 |
Family
ID=11525824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56002312A Granted JPS57116706A (en) | 1981-01-10 | 1981-01-10 | Manufacture of metallic magnetic powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57116706A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5531922A (en) * | 1992-08-04 | 1996-07-02 | Toda Kogyo Corporation | Granulated particles for magnetic particles for magnetic recording, and process for producing the same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52153198A (en) * | 1976-06-14 | 1977-12-20 | Toda Kogyo Corp | Method of manufacturing needleetype crystall iron magneticcparticle powder |
-
1981
- 1981-01-10 JP JP56002312A patent/JPS57116706A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52153198A (en) * | 1976-06-14 | 1977-12-20 | Toda Kogyo Corp | Method of manufacturing needleetype crystall iron magneticcparticle powder |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5531922A (en) * | 1992-08-04 | 1996-07-02 | Toda Kogyo Corporation | Granulated particles for magnetic particles for magnetic recording, and process for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0152441B2 (en) | 1989-11-08 |
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