IT978774B - Metodo per la produzione di goethite in forma aciculare - Google Patents
Metodo per la produzione di goethite in forma aciculareInfo
- Publication number
- IT978774B IT978774B IT1998973A IT1998973A IT978774B IT 978774 B IT978774 B IT 978774B IT 1998973 A IT1998973 A IT 1998973A IT 1998973 A IT1998973 A IT 1998973A IT 978774 B IT978774 B IT 978774B
- Authority
- IT
- Italy
- Prior art keywords
- goethite
- production
- acicular form
- acicular
- Prior art date
Links
- 229910052598 goethite Inorganic materials 0.000 title 1
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 title 1
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
- 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
- G11B5/70652—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
-
- 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
- C01P2004/00—Particle morphology
- C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- 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)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Compounds Of Iron (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1294572A JPS5529577B2 (it) | 1972-02-04 | 1972-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
IT978774B true IT978774B (it) | 1974-09-20 |
Family
ID=11819406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT1998973A IT978774B (it) | 1972-02-04 | 1973-02-02 | Metodo per la produzione di goethite in forma aciculare |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5529577B2 (it) |
DE (1) | DE2305153A1 (it) |
FR (1) | FR2170278B1 (it) |
GB (1) | GB1418733A (it) |
IT (1) | IT978774B (it) |
NL (1) | NL7301614A (it) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941289B2 (ja) * | 1974-03-12 | 1984-10-05 | 富士写真フイルム株式会社 | 磁性酸化鉄の製造方法 |
JPS6011446B2 (ja) * | 1976-07-15 | 1985-03-26 | 日立マクセル株式会社 | 強磁性金属粉末の製造法 |
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 |
JPS53127400A (en) * | 1977-04-13 | 1978-11-07 | Nippon Telegr & Teleph Corp <Ntt> | Production of goethite |
JPS5562105A (en) * | 1978-10-30 | 1980-05-10 | Hitachi Maxell Ltd | Production of magnetic alloy powder |
JPS5571002A (en) * | 1978-11-24 | 1980-05-28 | Hitachi Ltd | Manufacture of magnetic powder for magnetic recording medium |
JPS5573803A (en) * | 1978-11-25 | 1980-06-03 | Hitachi Maxell Ltd | Production of magnetic alloy powder |
JPS583250A (ja) * | 1981-06-30 | 1983-01-10 | Toshiba Corp | 半導体装置の製造方法 |
AU548794B2 (en) | 1981-07-28 | 1986-01-02 | Ishihara Sangyo Kaisha Ltd. | Process for producing cobalt containing ferromagnetic iron oxides |
JPS5869964U (ja) * | 1981-11-06 | 1983-05-12 | 日本電気株式会社 | 太陽電池パネル |
JPS62127577U (it) * | 1986-02-06 | 1987-08-13 | ||
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 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3117933A (en) * | 1959-06-12 | 1964-01-14 | Bayer Ag | Process for the production of needleshaped, cobalt-containing gamma-ferric oxide crystalline particles |
DE1204644B (de) * | 1962-03-30 | 1965-11-11 | Basf Ag | Verfahren zur Herstellung von insbesondere als Ausgangsmaterial fuer die Herstellung von hochkoerzitivem ª†-Eisen(III)-oxyd geeignetem nadelfoermigem Eisenoxydgelb, alpha-OH |
DE1247026B (de) * | 1965-01-09 | 1967-08-10 | Basf Ag | Verfahren zur Herstellung von fuer die Herstellung von Magnetogrammtraegern geeigneten, magnetisierbaren metallischen Teilchen |
GB1212126A (en) * | 1967-08-07 | 1970-11-11 | Toda Kogyo Kabushiki Kaisha | A METHOD OF MANUFACTURING gamma-Fe2O3 PARTICLES |
-
1972
- 1972-02-04 JP JP1294572A patent/JPS5529577B2/ja not_active Expired
-
1973
- 1973-01-31 GB GB479473A patent/GB1418733A/en not_active Expired
- 1973-02-02 DE DE19732305153 patent/DE2305153A1/de not_active Ceased
- 1973-02-02 IT IT1998973A patent/IT978774B/it active
- 1973-02-05 FR FR7304009A patent/FR2170278B1/fr not_active Expired
- 1973-02-05 NL NL7301614A patent/NL7301614A/xx not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
NL7301614A (it) | 1973-08-07 |
FR2170278B1 (it) | 1978-04-21 |
FR2170278A1 (it) | 1973-09-14 |
DE2305153A1 (de) | 1973-08-16 |
JPS4882395A (it) | 1973-11-02 |
JPS5529577B2 (it) | 1980-08-05 |
GB1418733A (en) | 1975-12-24 |
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