JPS5763605A - Manufacture of metallic magnetic powder - Google Patents
Manufacture of metallic magnetic powderInfo
- Publication number
- JPS5763605A JPS5763605A JP55137418A JP13741880A JPS5763605A JP S5763605 A JPS5763605 A JP S5763605A JP 55137418 A JP55137418 A JP 55137418A JP 13741880 A JP13741880 A JP 13741880A JP S5763605 A JPS5763605 A JP S5763605A
- Authority
- JP
- Japan
- Prior art keywords
- silicon compound
- needlelike
- iron oxyhydroxide
- manufacture
- magnetic 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
Landscapes
- Paints Or Removers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain ferromagnetic metallic powder for a magnetic recording body with high coercive force and saturation magnetic flux density suitable especially for high density recording by treating needlelike iron oxyhydroxide with a silicon compound followed by filtration, washing, calcination and reduction.
CONSTITUTION: Needlelike iron oxyhydroxide such as α-, β- γ-FeOOH or a mixture thereof is suspended in water, and a silicon compound such as Na2SiO3 is dissolved in the suspension, wall agitated, and mixed. The preferred amount of the silicon compound for the treatment is 0.1W10wt% to the amount of the iron oxyhydroxide as Fe2O3. The treated material is filtered with a filter or the like and washed. The resulting needlelike ironoxyhydroxide is calcinet at 400W800°C. The calcined material is then reduced at ≤600°C in a hydrogen atmosphere to manufacture the desired metallic magnetic powder.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55137418A JPS5763605A (en) | 1980-10-01 | 1980-10-01 | Manufacture of metallic magnetic powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55137418A JPS5763605A (en) | 1980-10-01 | 1980-10-01 | Manufacture of metallic magnetic powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5763605A true JPS5763605A (en) | 1982-04-17 |
JPS6349722B2 JPS6349722B2 (en) | 1988-10-05 |
Family
ID=15198160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55137418A Granted JPS5763605A (en) | 1980-10-01 | 1980-10-01 | Manufacture of metallic magnetic powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5763605A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4487627A (en) * | 1982-11-01 | 1984-12-11 | Fuji Photo Film Co., Ltd. | Method for preparing ferromagnetic metal particles |
EP0154285A2 (en) * | 1984-02-27 | 1985-09-11 | Fuji Photo Film Co., Ltd. | Process for producing ferromagnetic metal powder |
JPH02175806A (en) * | 1988-12-27 | 1990-07-09 | Ishihara Sangyo Kaisha Ltd | Manufacture of metal magnetic powder for magnetic recorder |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4883100A (en) * | 1972-01-21 | 1973-11-06 | ||
JPS5177900A (en) * | 1974-11-29 | 1976-07-06 | Montedison Spa | |
JPS534895A (en) * | 1976-06-16 | 1978-01-17 | Fujitsu Ltd | Manufacture of needle-shaped magnetic iron particles |
JPS5422958A (en) * | 1977-07-20 | 1979-02-21 | Matsushita Electric Ind Co Ltd | Dust remover for vacuum cleaner |
-
1980
- 1980-10-01 JP JP55137418A patent/JPS5763605A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4883100A (en) * | 1972-01-21 | 1973-11-06 | ||
JPS5177900A (en) * | 1974-11-29 | 1976-07-06 | Montedison Spa | |
JPS534895A (en) * | 1976-06-16 | 1978-01-17 | Fujitsu Ltd | Manufacture of needle-shaped magnetic iron particles |
JPS5422958A (en) * | 1977-07-20 | 1979-02-21 | Matsushita Electric Ind Co Ltd | Dust remover for vacuum cleaner |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4487627A (en) * | 1982-11-01 | 1984-12-11 | Fuji Photo Film Co., Ltd. | Method for preparing ferromagnetic metal particles |
EP0154285A2 (en) * | 1984-02-27 | 1985-09-11 | Fuji Photo Film Co., Ltd. | Process for producing ferromagnetic metal powder |
JPS60181210A (en) * | 1984-02-27 | 1985-09-14 | Fuji Photo Film Co Ltd | Manufacture of ferromagnetic metallic powder |
JPH02175806A (en) * | 1988-12-27 | 1990-07-09 | Ishihara Sangyo Kaisha Ltd | Manufacture of metal magnetic powder for magnetic recorder |
Also Published As
Publication number | Publication date |
---|---|
JPS6349722B2 (en) | 1988-10-05 |
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