BE727606A - - Google Patents
Info
- Publication number
- BE727606A BE727606A BE727606DA BE727606A BE 727606 A BE727606 A BE 727606A BE 727606D A BE727606D A BE 727606DA BE 727606 A BE727606 A BE 727606A
- Authority
- BE
- Belgium
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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70605—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys
- G11B5/70615—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys containing Fe metal or alloys
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
- G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
- G11B5/70668—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant
Landscapes
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Paints Or Removers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6801383.A NL160106C (nl) | 1968-01-31 | 1968-01-31 | Werkwijze ter bereiding van een in hoofdzaak uit ijzer bestaand magnetisch stabiel poeder, voor magnetische registratie. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE727606A true BE727606A (US07714131-20100511-C00038.png) | 1969-07-29 |
Family
ID=19802639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE727606D BE727606A (US07714131-20100511-C00038.png) | 1968-01-31 | 1969-01-29 |
Country Status (9)
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3902888A (en) * | 1971-08-19 | 1975-09-02 | Fuji Photo Film Co Ltd | Process for preparing ferromagnetic alloy powder |
| DE2212933A1 (de) * | 1972-03-17 | 1973-09-20 | Philips Nv | Verfahren zur herstellung eines im wesentlichen aus eisen bestehenden metallpulvers |
| NL167729C (nl) * | 1973-05-03 | 1982-01-18 | Philips Nv | Werkwijze voor het bereiden van een hoofdzakelijk uit ijzer bestaand metaalpoeder. |
| DE2361539C2 (de) * | 1973-12-11 | 1984-06-20 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Verfahren zur Herstellung eines ferromagnetischen, überwiegend aus Eisen bestehenden Materials |
| IT1026663B (it) * | 1974-11-29 | 1978-10-20 | Montedison Spa | Procedimento per preparare polve ri metalliche a base di ferro per registrzione hagnetica |
| US3967986A (en) * | 1975-01-27 | 1976-07-06 | U.S. Philips Corporation | Method of preparing ferromagnetic material |
| US4043846A (en) * | 1975-03-17 | 1977-08-23 | Hitachi, Ltd. | Method of producing ferromagnetic metal powder by gaseous reduction of silicon compound-coated raw material |
| JPS6044805B2 (ja) * | 1976-08-27 | 1985-10-05 | 日本ビクター株式会社 | 磁気記録媒体の製造方法 |
| DE2646348C2 (de) * | 1976-10-14 | 1986-08-28 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigen, ferromagnetischen, im wesentlichen aus Eisen bestehenden Metallteilchen und deren Verwendung zur Herstellung von magnetischen Aufzeichnungsträgern |
| JPS5376957A (en) * | 1976-12-20 | 1978-07-07 | Hitachi Maxell | Magnetic metal iron powder and said manufacturing process |
| JPS54122664A (en) * | 1978-03-16 | 1979-09-22 | Kanto Denka Kogyo Kk | Production of magnetic powder for magnetic recording based on iron |
| JPS54122663A (en) * | 1978-03-16 | 1979-09-22 | Kanto Denka Kogyo Kk | Production of magnetic powder for magnetic recording based on iron |
| US4165232A (en) * | 1978-09-15 | 1979-08-21 | Basf Aktiengesellschaft | Manufacture of ferromagnetic metal particles essentially consisting of iron |
| DE2909480A1 (de) * | 1979-03-10 | 1980-09-11 | Bayer Ag | Ferromagnetisches, im wesentlichen aus eisen bestehendes metallpigment und verfahren zu dessen herstellung |
| EP0041257B1 (en) * | 1980-05-30 | 1984-11-14 | Hitachi Maxell Ltd. | Process for preparing ferromagnetic particles comprising metallic iron |
| US4305753A (en) * | 1980-07-31 | 1981-12-15 | Hercules Incorporated | Process for producing ferromagnetic metallic particles |
| US4400337A (en) * | 1981-01-10 | 1983-08-23 | Hitachi Maxell, Ltd. | Method for production of metal magnetic particles |
| US4437881A (en) * | 1982-07-31 | 1984-03-20 | Toda Kogyo Corp. | Acicular ferromagnetic alloy particles and process for producing said particles |
| JPS5980901A (ja) * | 1982-11-01 | 1984-05-10 | Fuji Photo Film Co Ltd | 強磁性金属粉末の製造法 |
| US5110658A (en) * | 1987-10-19 | 1992-05-05 | Konica Corporation | Magnetic recording medium |
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1968
- 1968-01-31 NL NL6801383.A patent/NL160106C/xx not_active IP Right Cessation
- 1968-12-24 FR FR1602579D patent/FR1602579A/fr not_active Expired
-
1969
- 1969-01-17 DE DE1902270A patent/DE1902270B2/de not_active Ceased
- 1969-01-28 SE SE01130/69A patent/SE352768B/xx unknown
- 1969-01-28 GB GB4582/69A patent/GB1192167A/en not_active Expired
- 1969-01-28 CH CH128269A patent/CH510118A/de not_active IP Right Cessation
- 1969-01-28 AT AT83669A patent/AT313337B/de not_active IP Right Cessation
- 1969-01-29 US US795078*A patent/US3598568A/en not_active Expired - Lifetime
- 1969-01-29 BE BE727606D patent/BE727606A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE1902270A1 (de) | 1969-09-04 |
| FR1602579A (US07714131-20100511-C00038.png) | 1970-12-28 |
| SE352768B (US07714131-20100511-C00038.png) | 1973-01-08 |
| US3598568A (en) | 1971-08-10 |
| NL6801383A (US07714131-20100511-C00038.png) | 1969-08-04 |
| NL160106C (nl) | 1979-09-17 |
| CH510118A (de) | 1971-07-15 |
| DE1902270B2 (de) | 1975-04-30 |
| AT313337B (de) | 1974-02-11 |
| GB1192167A (en) | 1970-05-20 |
| NL160106B (nl) | 1979-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: PHILIPS N.V. Effective date: 19840129 |