FR2517292B1 - Procede de preparation de a-feooh aciculaire pour une matiere d'enregistrement magnetique - Google Patents
Procede de preparation de a-feooh aciculaire pour une matiere d'enregistrement magnetiqueInfo
- Publication number
- FR2517292B1 FR2517292B1 FR8219987A FR8219987A FR2517292B1 FR 2517292 B1 FR2517292 B1 FR 2517292B1 FR 8219987 A FR8219987 A FR 8219987A FR 8219987 A FR8219987 A FR 8219987A FR 2517292 B1 FR2517292 B1 FR 2517292B1
- Authority
- FR
- France
- Prior art keywords
- feooh
- acicular
- preparation
- magnetic recording
- recording material
- 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
Classifications
-
- 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
-
- 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
- G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
-
- 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
- H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- 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
- C01P2004/51—Particles with a specific particle size distribution
-
- 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
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- 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)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56190166A JPS5891039A (ja) | 1981-11-27 | 1981-11-27 | 磁気記録材料用針状α−FeOOHの製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2517292A1 FR2517292A1 (fr) | 1983-06-03 |
FR2517292B1 true FR2517292B1 (fr) | 1988-09-30 |
Family
ID=16253523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8219987A Expired FR2517292B1 (fr) | 1981-11-27 | 1982-11-29 | Procede de preparation de a-feooh aciculaire pour une matiere d'enregistrement magnetique |
Country Status (6)
Country | Link |
---|---|
US (1) | US4560544A (fr) |
JP (1) | JPS5891039A (fr) |
KR (1) | KR890000703B1 (fr) |
DE (1) | DE3243868C2 (fr) |
FR (1) | FR2517292B1 (fr) |
GB (1) | GB2111471B (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60255673A (ja) * | 1984-01-31 | 1985-12-17 | 三菱マテリアル株式会社 | 酸窒化チタン焼結体の製造方法 |
DE3413752A1 (de) * | 1984-04-12 | 1985-10-24 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung isotroper magnetischer, kobalthaltiger eisenoxide |
DE4310864A1 (de) * | 1993-04-02 | 1994-10-06 | Basf Ag | Verfahren zur Herstellung von transparenten Eisenoxid-Gelbpigmenten |
EP0726878B1 (fr) * | 1993-11-01 | 1999-05-12 | Minnesota Mining And Manufacturing Company | Procede de fabrication de goethite |
DE19601412C2 (de) * | 1996-01-17 | 1999-07-22 | Emtec Magnetics Gmbh | Ferromagnetische Pigmente |
CN112340829A (zh) * | 2020-10-26 | 2021-02-09 | 广东省科学院生态环境与土壤研究所 | 磷酸盐在促进绿锈活化分子氧中的应用 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1357866A (fr) * | 1963-03-29 | 1964-04-10 | Basf Ag | Procédé pour la production d'oxyde de fer jaune alpha aciculaire, convenant notamment comme matière de départ pour la production d'oxyde de fer-iii-gamma hautement coercitif |
FR1363027A (fr) * | 1963-07-16 | 1964-06-05 | Bayer Ag | Procédé de préparation d'oxyde ferrique gamma ferromagnétique |
DE1592398A1 (de) * | 1967-02-08 | 1970-12-17 | Bayer Ag | Verwendung von hochkoerzitivem nadelfoermigem gamma-Fe2O3 zur Herstellung von Magnetogrammtraegern |
GB1385777A (en) * | 1971-05-06 | 1975-02-26 | Bayer Ag | Magnetic iron oxides and a process for their production |
JPS5854487B2 (ja) * | 1977-08-29 | 1983-12-05 | 戸田工業株式会社 | 磁気記録材料用針状磁性酸化鉄粒子粉末の製造法 |
DE2815712A1 (de) * | 1978-04-12 | 1979-10-25 | Bayer Ag | Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung |
-
1981
- 1981-11-27 JP JP56190166A patent/JPS5891039A/ja active Granted
-
1982
- 1982-11-26 DE DE3243868A patent/DE3243868C2/de not_active Expired - Lifetime
- 1982-11-26 KR KR8205333A patent/KR890000703B1/ko active
- 1982-11-29 FR FR8219987A patent/FR2517292B1/fr not_active Expired
- 1982-11-29 GB GB08233959A patent/GB2111471B/en not_active Expired
-
1984
- 1984-12-10 US US06/680,241 patent/US4560544A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2517292A1 (fr) | 1983-06-03 |
US4560544A (en) | 1985-12-24 |
DE3243868C2 (de) | 1994-01-20 |
KR890000703B1 (ko) | 1989-03-27 |
GB2111471A (en) | 1983-07-06 |
JPS5891039A (ja) | 1983-05-30 |
GB2111471B (en) | 1985-09-25 |
JPS6135135B2 (fr) | 1986-08-11 |
DE3243868A1 (de) | 1983-06-01 |
KR840002327A (ko) | 1984-06-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |