JPS55104922A - Cobalt compounded ferrimagnetic iron oxide and its manufacture - Google Patents
Cobalt compounded ferrimagnetic iron oxide and its manufactureInfo
- Publication number
- JPS55104922A JPS55104922A JP841080A JP841080A JPS55104922A JP S55104922 A JPS55104922 A JP S55104922A JP 841080 A JP841080 A JP 841080A JP 841080 A JP841080 A JP 841080A JP S55104922 A JPS55104922 A JP S55104922A
- Authority
- JP
- Japan
- Prior art keywords
- compounded
- cobalt
- manufacture
- iron oxide
- ferrimagnetic iron
- 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
Classifications
-
- 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
- G11B5/70678—Ferrites
- G11B5/70684—Ferro-ferrioxydes
- G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
Landscapes
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2903593A DE2903593C3 (de) | 1979-01-31 | 1979-01-31 | Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55104922A true JPS55104922A (en) | 1980-08-11 |
JPS6320771B2 JPS6320771B2 (ja) | 1988-04-30 |
Family
ID=6061787
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP841080A Granted JPS55104922A (en) | 1979-01-31 | 1980-01-29 | Cobalt compounded ferrimagnetic iron oxide and its manufacture |
JP61238208A Granted JPS62183025A (ja) | 1979-01-31 | 1986-10-08 | 磁気的信号記録用テ−プ |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61238208A Granted JPS62183025A (ja) | 1979-01-31 | 1986-10-08 | 磁気的信号記録用テ−プ |
Country Status (5)
Country | Link |
---|---|
US (1) | US4297395A (ja) |
EP (1) | EP0014363B1 (ja) |
JP (2) | JPS55104922A (ja) |
DE (2) | DE2903593C3 (ja) |
PL (1) | PL121668B1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5825202A (ja) * | 1981-07-21 | 1983-02-15 | Ishihara Sangyo Kaisha Ltd | 磁気記録材料用針状α−FeOOHの製造方法 |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57158015A (en) * | 1981-03-26 | 1982-09-29 | Tdk Corp | Magnetic recording medium |
NL8204897A (nl) * | 1982-12-20 | 1984-07-16 | Philips Nv | Magneetkop met een kern van mn-zn-co-ferroferriet. |
DE3413752A1 (de) * | 1984-04-12 | 1985-10-24 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung isotroper magnetischer, kobalthaltiger eisenoxide |
DE3500471A1 (de) * | 1985-01-09 | 1986-07-10 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung von isometrischen magnetischen eisenoxidpigmenten |
DE3500470A1 (de) * | 1985-01-09 | 1986-07-10 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung heller farbreiner eisenoxidrotpigmente |
DE3516885A1 (de) * | 1985-05-10 | 1986-11-13 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung nadelfoermiger, kobalthaltiger ferrimagnetischer eisenoxide |
US4770951A (en) * | 1985-08-16 | 1988-09-13 | Graham Magnetics, Inc. | Magnetic flexible disks |
JPS62108737A (ja) * | 1985-11-08 | 1987-05-20 | Fuji Photo Film Co Ltd | 強磁性酸化鉄粉末の製造方法 |
DE3619746A1 (de) * | 1986-06-12 | 1987-12-17 | Basf Ag | Superparamagnetische feststoffteilchen |
DE3631193A1 (de) * | 1986-09-13 | 1988-03-24 | Bayer Ag | Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung |
DE3631194A1 (de) * | 1986-09-13 | 1988-03-24 | Bayer Ag | Magnetische eisenoxidpigmente sowie verfahren zu ihrer herstellung |
DE3910782C2 (de) * | 1988-12-24 | 2003-08-28 | Toda Kogyo Corp | Verfahren zur Herstellung von magnetischen Eisenoxiden und so erhaltene Pigmente |
DE68923544T2 (de) * | 1988-12-29 | 1996-03-28 | Toda Kogyo Corp | Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. |
MY107614A (en) * | 1990-09-26 | 1996-05-15 | Ishihara Sangyo Kaisha | Acicular ferromagnetic iron oxide particles and process for producing the same |
JP2974452B2 (ja) * | 1991-06-19 | 1999-11-10 | キヤノン株式会社 | 磁性トナー |
DE4319572A1 (de) * | 1993-06-14 | 1994-12-15 | Toda Kogyo Corp | Co-haltige Eisenoxidpigmente, Verfahren zu ihrer Herstellung und diese enthaltende magnetische Medien |
FR2714205A1 (fr) * | 1993-12-17 | 1995-06-23 | Atg Sa | Matériau composite pour l'enregistrement magnéto-optique, sa préparation et son utilisation. |
CN114621298B (zh) * | 2022-03-25 | 2024-04-19 | 宿迁学院 | 具有高亚铁磁有序温度的钴有机膦酸化合物及其制备方法 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3573980A (en) * | 1968-02-19 | 1971-04-06 | Minnesota Mining & Mfg | Method of making magnetic particles and recording tape |
GB1268458A (en) * | 1969-05-07 | 1972-03-29 | Ampex | Improvements in and relating to the preparation of cobalt doped gamma ferric oxide |
BE790376A (fr) * | 1971-10-27 | 1973-02-15 | Ampex | Particules d'oxyde de fer magnétique dopé au cobalt |
JPS4887397A (ja) * | 1972-02-23 | 1973-11-16 | ||
JPS5321119B2 (ja) * | 1973-03-20 | 1978-06-30 | ||
DE2243231C2 (de) * | 1972-09-01 | 1982-01-28 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von Cobalt-dotiertem γ-Eisen(III)oxid |
DE2254810C2 (de) * | 1972-11-09 | 1985-12-12 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Verbesserung der magnetischen Eigenschaften von Gamma-Eisen (III)oxiden |
JPS5242363B2 (ja) * | 1973-03-20 | 1977-10-24 | ||
US3931025A (en) * | 1973-09-21 | 1976-01-06 | Bayer Aktiengesellschaft | Magnetic iron oxides with improved orientability and a process for their production |
US4052326A (en) * | 1973-10-19 | 1977-10-04 | Basf Aktiengesellschaft | Manufacture of γ-iron(III) oxide |
DE2352440C2 (de) * | 1973-10-19 | 1983-11-03 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von γ- Eisen(III)oxid |
JPS5719049B2 (ja) * | 1974-06-13 | 1982-04-20 | ||
JPS604566B2 (ja) * | 1974-06-28 | 1985-02-05 | 富士写真フイルム株式会社 | 強磁性粉末及びこれを使用した磁気記録体の安定化方法 |
DE2507420A1 (de) * | 1975-02-21 | 1976-08-26 | Bayer Ag | Remanenzstabilisierte hochkoerzitive cobalthaltige magnetische eisenoxide |
JPS525497A (en) * | 1975-07-02 | 1977-01-17 | Fuji Photo Film Co Ltd | Ferromagnetic grit manufacturing process |
AT345252B (de) * | 1975-10-31 | 1978-09-11 | Unibra Sa | Verfahren zur herstellung von magnetoxiden |
JPS5319998A (en) * | 1976-08-09 | 1978-02-23 | Toda Kogyo Corp | Process for preparing cobalttdoped acicular magnetite particle having magnetic stability |
DE2705967C2 (de) * | 1977-02-12 | 1990-01-04 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
JPS5413997A (en) * | 1977-07-04 | 1979-02-01 | Sony Corp | Magnetic recording medium and its manufacture |
DE2801395C2 (de) * | 1978-01-13 | 1982-04-22 | Bayer Ag, 5090 Leverkusen | Thermisch stabilisiertes ferrimagnetisches Eisenoxid |
-
1979
- 1979-01-31 DE DE2903593A patent/DE2903593C3/de not_active Expired
-
1980
- 1980-01-10 US US06/110,876 patent/US4297395A/en not_active Expired - Lifetime
- 1980-01-21 DE DE8080100264T patent/DE3061081D1/de not_active Expired
- 1980-01-21 EP EP80100264A patent/EP0014363B1/de not_active Expired
- 1980-01-28 PL PL1980221636A patent/PL121668B1/pl unknown
- 1980-01-29 JP JP841080A patent/JPS55104922A/ja active Granted
-
1986
- 1986-10-08 JP JP61238208A patent/JPS62183025A/ja active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5825202A (ja) * | 1981-07-21 | 1983-02-15 | Ishihara Sangyo Kaisha Ltd | 磁気記録材料用針状α−FeOOHの製造方法 |
JPS6334608B2 (ja) * | 1981-07-21 | 1988-07-11 | Ishihara Sangyo Kaisha |
Also Published As
Publication number | Publication date |
---|---|
JPS6320771B2 (ja) | 1988-04-30 |
EP0014363B1 (de) | 1982-11-17 |
JPS62183025A (ja) | 1987-08-11 |
DE2903593B2 (de) | 1981-07-30 |
US4297395A (en) | 1981-10-27 |
DE2903593A1 (de) | 1980-08-07 |
DE2903593C3 (de) | 1982-05-06 |
DE3061081D1 (en) | 1982-12-23 |
JPH0247010B2 (ja) | 1990-10-18 |
PL221636A1 (ja) | 1980-11-03 |
PL121668B1 (en) | 1982-05-31 |
EP0014363A1 (de) | 1980-08-20 |
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