GB1432643A - Manufacture of cobalt-modified ypsilon-iron-iii-oxides - Google Patents
Manufacture of cobalt-modified ypsilon-iron-iii-oxidesInfo
- Publication number
- GB1432643A GB1432643A GB4107273A GB4107273A GB1432643A GB 1432643 A GB1432643 A GB 1432643A GB 4107273 A GB4107273 A GB 4107273A GB 4107273 A GB4107273 A GB 4107273A GB 1432643 A GB1432643 A GB 1432643A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cobalt
- iron
- oxide
- iii
- magnetite
- 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.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 6
- 239000010941 cobalt Substances 0.000 abstract 4
- 229910017052 cobalt Inorganic materials 0.000 abstract 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 4
- 229910001566 austenite Inorganic materials 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 150000001869 cobalt compounds Chemical class 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052796 boron Inorganic materials 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 150000004679 hydroxides Chemical class 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 239000011574 phosphorus Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000012266 salt solution Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
- 229910006540 α-FeOOH Inorganic materials 0.000 abstract 1
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
- G11B5/70652—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
- G11B5/70673—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 containing Co
-
- 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
- G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
Landscapes
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722243231 DE2243231C2 (de) | 1972-09-01 | 1972-09-01 | Verfahren zur Herstellung von Cobalt-dotiertem γ-Eisen(III)oxid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1432643A true GB1432643A (en) | 1976-04-22 |
Family
ID=5855337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4107273A Expired GB1432643A (en) | 1972-09-01 | 1973-08-31 | Manufacture of cobalt-modified ypsilon-iron-iii-oxides |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5737532B2 (enrdf_load_stackoverflow) |
| DE (1) | DE2243231C2 (enrdf_load_stackoverflow) |
| FR (1) | FR2197818B3 (enrdf_load_stackoverflow) |
| GB (1) | GB1432643A (enrdf_load_stackoverflow) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4287233A (en) | 1979-02-13 | 1981-09-01 | Basf Aktiengesellschaft | Manufacture of acicular cobalt-containing magnetic iron oxide |
| US4296149A (en) | 1979-02-13 | 1981-10-20 | Basf Aktiengesellschaft | Manufacture of acicular cobalt-containing magnetic iron oxide |
| US4501774A (en) * | 1981-10-12 | 1985-02-26 | Ishihara Sangyo Kaisha, Ltd. | Process for the production of cobalt-containing magnetic iron oxide powder |
| US4631140A (en) * | 1984-10-18 | 1986-12-23 | Basf Aktiengesellschaft | Ferrimagnetic particles and their preparation |
| EP0158240A3 (de) * | 1984-04-12 | 1988-07-06 | BASF Aktiengesellschaft | Verfahren zur Herstellung isotroper magnetischer, kobalthaltiger Eisenoxide |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719049B2 (enrdf_load_stackoverflow) * | 1974-06-13 | 1982-04-20 | ||
| DE2625106C2 (de) * | 1976-06-04 | 1982-03-11 | Bayer Ag, 5090 Leverkusen | Eisenoxidschwarz-Pigmente mit verbesserter Oxidationsbeständigkeit und Verfahren zu ihrer Herstellung |
| 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 |
| DE2743298A1 (de) * | 1977-09-27 | 1979-04-05 | Basf Ag | Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen und verfahren zu deren herstellung |
| DE2815712A1 (de) * | 1978-04-12 | 1979-10-25 | Bayer Ag | Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung |
| US4276183A (en) * | 1978-10-25 | 1981-06-30 | Pfizer Inc. | Cobalt modified magnetic iron oxide |
| DE2903593C3 (de) * | 1979-01-31 | 1982-05-06 | Bayer Ag, 5090 Leverkusen | Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung |
| JPS55149137A (en) * | 1979-05-11 | 1980-11-20 | Tdk Corp | High performance high coercive force powder and its manufacture |
| JPS5626729A (en) * | 1979-08-11 | 1981-03-14 | Tdk Corp | Powdered magnetic material for magnetic recording medium |
| JPS5819733A (ja) * | 1981-07-28 | 1983-02-04 | Toshiba Corp | 磁気記録媒体及びその製造方法 |
| AU555302B2 (en) * | 1981-12-25 | 1986-09-18 | Ishihara Sangyo Kaisha Ltd. | Cobalt containing iron oxide powder |
| JPS59107924A (ja) * | 1982-12-08 | 1984-06-22 | Ishihara Sangyo Kaisha Ltd | コバルト含有磁性酸化鉄粉末の製造方法 |
| JPS6187302A (ja) * | 1985-10-18 | 1986-05-02 | Sony Corp | 磁気記録媒体の製法 |
| DE3631193A1 (de) * | 1986-09-13 | 1988-03-24 | Bayer Ag | Magnetische eisenoxidpigmente und 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1592214C3 (de) * | 1967-11-25 | 1979-10-18 | Agfa-Gevaert Ag, 5090 Leverkusen | Verfahren zur Herstellung von magnetischem γ -Fe2 O3 durch Konvertierung von a -FeOOH-Teilchen |
| GB1268458A (en) * | 1969-05-07 | 1972-03-29 | Ampex | Improvements in and relating to the preparation of cobalt doped gamma ferric oxide |
-
1972
- 1972-09-01 DE DE19722243231 patent/DE2243231C2/de not_active Expired
-
1973
- 1973-08-30 JP JP9678673A patent/JPS5737532B2/ja not_active Expired
- 1973-08-31 GB GB4107273A patent/GB1432643A/en not_active Expired
- 1973-09-03 FR FR7331734A patent/FR2197818B3/fr not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4287233A (en) | 1979-02-13 | 1981-09-01 | Basf Aktiengesellschaft | Manufacture of acicular cobalt-containing magnetic iron oxide |
| US4296149A (en) | 1979-02-13 | 1981-10-20 | Basf Aktiengesellschaft | Manufacture of acicular cobalt-containing magnetic iron oxide |
| US4501774A (en) * | 1981-10-12 | 1985-02-26 | Ishihara Sangyo Kaisha, Ltd. | Process for the production of cobalt-containing magnetic iron oxide powder |
| EP0158240A3 (de) * | 1984-04-12 | 1988-07-06 | BASF Aktiengesellschaft | Verfahren zur Herstellung isotroper magnetischer, kobalthaltiger Eisenoxide |
| US4631140A (en) * | 1984-10-18 | 1986-12-23 | Basf Aktiengesellschaft | Ferrimagnetic particles and their preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2243231C2 (de) | 1982-01-28 |
| FR2197818A1 (enrdf_load_stackoverflow) | 1974-03-29 |
| FR2197818B3 (enrdf_load_stackoverflow) | 1976-08-06 |
| DE2243231A1 (de) | 1974-03-21 |
| JPS5737532B2 (enrdf_load_stackoverflow) | 1982-08-10 |
| JPS4969588A (enrdf_load_stackoverflow) | 1974-07-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |