GB1482162A - Manufacture of ypsilon-iron(iii)oxide - Google Patents
Manufacture of ypsilon-iron(iii)oxideInfo
- Publication number
- GB1482162A GB1482162A GB4518474A GB4518474A GB1482162A GB 1482162 A GB1482162 A GB 1482162A GB 4518474 A GB4518474 A GB 4518474A GB 4518474 A GB4518474 A GB 4518474A GB 1482162 A GB1482162 A GB 1482162A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ferric oxide
- acicular
- magnetite
- oxide
- ypsilon
- 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
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title 1
- 238000004519 manufacturing process Methods 0.000 title 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-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 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 229910052598 goethite Inorganic materials 0.000 abstract 1
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
-
- 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
- G11B5/70647—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 with a skin
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
- C01P2002/52—Solid solutions containing elements as dopants
- C01P2002/54—Solid solutions containing elements as dopants one element only
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- General Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
Abstract
1482162 Acicular γ-ferric oxide BASF AG 18 Oct 1974 [19 Oct 1973] 45184/74 Heading C1A Acicular γ-ferric oxide of high coercivity is prepared by heating gaethite or acicular α- ferric oxide at a temperature of 500-800‹ C., and reducing the product to magnetite at 280-600‹ C., heating the magnetite at 400- 600‹ C. in an inert gas atmosphere, preferably nitrogen, followed by oxidation of the treated magnetite preferably at 200-400‹ C. in oxygen. The goethite may be modified with 0À5-25% by weight of cobalt based on the ferric oxide and the product is suitable for use in magnetic recording media.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732352440 DE2352440C2 (en) | 1973-10-19 | 1973-10-19 | Process for the production of γ-ferric oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1482162A true GB1482162A (en) | 1977-08-10 |
Family
ID=5895848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4518474A Expired GB1482162A (en) | 1973-10-19 | 1974-10-18 | Manufacture of ypsilon-iron(iii)oxide |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5719057B2 (en) |
| DE (1) | DE2352440C2 (en) |
| GB (1) | GB1482162A (en) |
| NL (1) | NL181099C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT345252B (en) * | 1975-10-31 | 1978-09-11 | Unibra Sa | METHOD FOR MANUFACTURING MAGNETOXIDS |
| DE2903593C3 (en) * | 1979-01-31 | 1982-05-06 | Bayer Ag, 5090 Leverkusen | Cobalt-doped ferrimagnetic iron oxides and processes for their production |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1250803B (en) * | 1964-01-30 | 1967-09-28 | Eastman Kodak Company, Rochester, N.Y. (V. St. A.) | Process for the production of y-FeaOs |
-
1973
- 1973-10-19 DE DE19732352440 patent/DE2352440C2/en not_active Expired
-
1974
- 1974-10-17 NL NL7413657A patent/NL181099C/en not_active IP Right Cessation
- 1974-10-18 GB GB4518474A patent/GB1482162A/en not_active Expired
- 1974-10-19 JP JP11991074A patent/JPS5719057B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL181099B (en) | 1987-01-16 |
| NL7413657A (en) | 1975-04-22 |
| JPS50112300A (en) | 1975-09-03 |
| JPS5719057B2 (en) | 1982-04-20 |
| DE2352440C2 (en) | 1983-11-03 |
| NL181099C (en) | 1987-06-16 |
| DE2352440A1 (en) | 1975-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |