DE3583047D1 - Verfahren zur herstellung von ferromagnetischem metallpulver. - Google Patents
Verfahren zur herstellung von ferromagnetischem metallpulver.Info
- Publication number
- DE3583047D1 DE3583047D1 DE8585102088T DE3583047T DE3583047D1 DE 3583047 D1 DE3583047 D1 DE 3583047D1 DE 8585102088 T DE8585102088 T DE 8585102088T DE 3583047 T DE3583047 T DE 3583047T DE 3583047 D1 DE3583047 D1 DE 3583047D1
- Authority
- DE
- Germany
- Prior art keywords
- metal powder
- ferromagnetic metal
- producing ferromagnetic
- producing
- 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.)
- Revoked
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/065—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder obtained by a reduction
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B15/00—Other processes for the manufacture of iron from iron compounds
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59035582A JPS60181210A (ja) | 1984-02-27 | 1984-02-27 | 強磁性金属粉末の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3583047D1 true DE3583047D1 (de) | 1991-07-11 |
Family
ID=12445758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8585102088T Revoked DE3583047D1 (de) | 1984-02-27 | 1985-02-26 | Verfahren zur herstellung von ferromagnetischem metallpulver. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4576635A (de) |
EP (1) | EP0154285B1 (de) |
JP (1) | JPS60181210A (de) |
DE (1) | DE3583047D1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01164006A (ja) * | 1987-09-02 | 1989-06-28 | Kao Corp | 強磁性金属粉末及びその製造方法 |
JPH01257309A (ja) * | 1988-04-07 | 1989-10-13 | Tdk Corp | 磁気記録媒体用磁性粉末とその製造方法 |
JPH02175806A (ja) * | 1988-12-27 | 1990-07-09 | Ishihara Sangyo Kaisha Ltd | 磁気記録用金属磁性粉末の製造方法 |
JP2918619B2 (ja) * | 1990-04-06 | 1999-07-12 | 花王株式会社 | 金属磁性粉末の製造方法及び磁気記録媒体用塗膜 |
JPH07116496B2 (ja) * | 1990-10-09 | 1995-12-13 | 三井金属鉱業株式会社 | 磁気記録用磁性金属粉末の製造方法 |
US5641470A (en) * | 1995-07-17 | 1997-06-24 | Minnesota Mining And Manufacturing Company | Process for making goethite |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4133677A (en) * | 1976-04-05 | 1979-01-09 | Toda Kogyo Corp. | Process for producing acicular magnetic metallic particle powder |
JPS52134858A (en) * | 1976-05-07 | 1977-11-11 | Kanto Denka Kogyo Kk | Method of making magnetic recording magnetic powder containing iron as main constituent |
JPS5585605A (en) * | 1978-12-20 | 1980-06-27 | Hitachi Ltd | Production of ferromagnetic metal powder |
DE3167164D1 (en) * | 1980-05-30 | 1984-12-20 | Hitachi Maxell | Process for preparing ferromagnetic particles comprising metallic iron |
EP0041727B1 (de) * | 1980-06-11 | 1987-09-09 | Hitachi Maxell Ltd. | Verfahren zur Herstellung von im wesentlichen aus metallischem Eisen bestehenden ferromagnetischen Teilchen |
JPS5919169B2 (ja) * | 1980-07-11 | 1984-05-02 | 日立マクセル株式会社 | 金属磁性粉末の製造方法 |
JPS5853688B2 (ja) * | 1980-08-05 | 1983-11-30 | 戸田工業株式会社 | Fe−Mgを主成分とする針状晶合金磁性粒子粉末の製造法 |
JPS5763605A (en) * | 1980-10-01 | 1982-04-17 | Kanto Denka Kogyo Kk | Manufacture of metallic magnetic powder |
US4400337A (en) * | 1981-01-10 | 1983-08-23 | Hitachi Maxell, Ltd. | Method for production of metal magnetic particles |
DE3245612A1 (de) * | 1981-12-10 | 1983-08-11 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | Verfahren zur herstellung eines ferromagnetischen metallpulvers und verwendung des pulvers fuer magnetische aufzeichnungsmaterialien |
DE3228669A1 (de) * | 1982-07-31 | 1984-02-02 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung nadelfoermiger, im wesentlichen aus eisen bestehender ferromagnetischer metallteilchen |
JPS5980901A (ja) * | 1982-11-01 | 1984-05-10 | Fuji Photo Film Co Ltd | 強磁性金属粉末の製造法 |
US4514216A (en) * | 1983-04-30 | 1985-04-30 | Toda Kogyo Corp. | Acicular ferromagnetic alloy particles for magnetic recording and process for producing the same |
-
1984
- 1984-02-27 JP JP59035582A patent/JPS60181210A/ja active Pending
-
1985
- 1985-02-26 EP EP85102088A patent/EP0154285B1/de not_active Expired - Lifetime
- 1985-02-26 DE DE8585102088T patent/DE3583047D1/de not_active Revoked
- 1985-02-27 US US06/705,975 patent/US4576635A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4576635A (en) | 1986-03-18 |
JPS60181210A (ja) | 1985-09-14 |
EP0154285A2 (de) | 1985-09-11 |
EP0154285B1 (de) | 1991-06-05 |
EP0154285A3 (en) | 1989-05-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8363 | Opposition against the patent | ||
8331 | Complete revocation |