DE3774584D1 - Plaettchenfoermige bariumferritteilchen und verfahren zu ihrer herstellung. - Google Patents
Plaettchenfoermige bariumferritteilchen und verfahren zu ihrer herstellung.Info
- Publication number
- DE3774584D1 DE3774584D1 DE8787300784T DE3774584T DE3774584D1 DE 3774584 D1 DE3774584 D1 DE 3774584D1 DE 8787300784 T DE8787300784 T DE 8787300784T DE 3774584 T DE3774584 T DE 3774584T DE 3774584 D1 DE3774584 D1 DE 3774584D1
- Authority
- DE
- Germany
- Prior art keywords
- ferride
- particles
- production
- plate
- shaped barium
- 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 - Lifetime
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/009—Compounds containing, besides iron, two or more other elements, with the exception of oxygen or hydrogen
-
- 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
-
- 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
- C01P2002/00—Crystal-structural characteristics
- C01P2002/30—Three-dimensional structures
- C01P2002/32—Three-dimensional structures spinel-type (AB2O4)
-
- 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
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- 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)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Composite Materials (AREA)
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61018833A JPS62176921A (ja) | 1986-01-29 | 1986-01-29 | 板状Baフエライト微粒子粉末の製造法 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3774584D1 true DE3774584D1 (de) | 1992-01-02 |
Family
ID=11982563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8787300784T Expired - Lifetime DE3774584D1 (de) | 1986-01-29 | 1987-01-29 | Plaettchenfoermige bariumferritteilchen und verfahren zu ihrer herstellung. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4752407A (de) |
EP (1) | EP0231128B1 (de) |
JP (1) | JPS62176921A (de) |
KR (1) | KR870007536A (de) |
DE (1) | DE3774584D1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4828916A (en) * | 1986-12-27 | 1989-05-09 | Toda Kogyo Corporation | Plate-like magnetoplumbite type ferrite particles for magnetic recording and magnetic recording media using the same |
US5075169A (en) * | 1988-06-08 | 1991-12-24 | Toda Kogyo Corp. | Plate-like composite ferrite particles for magnetic recording and process for producing the same |
JP2644322B2 (ja) * | 1989-03-31 | 1997-08-25 | 株式会社東芝 | 磁気記録媒体 |
JPH0672018B2 (ja) * | 1989-04-22 | 1994-09-14 | 戸田工業株式会社 | 磁気記録用板状複合フェライト微粒子粉末及びその製造法 |
JP5390756B2 (ja) * | 2007-08-02 | 2014-01-15 | 関東電化工業株式会社 | 薄片状Baフェライト微粒子の製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941806A (ja) * | 1982-08-31 | 1984-03-08 | Toda Kogyo Corp | 磁気記録用板状Baフエライト粒子粉末の製造法 |
JPS59161002A (ja) * | 1983-02-05 | 1984-09-11 | Toda Kogyo Corp | 磁気記録用板状Baフェライト微粒子粉末及びその製造法 |
US4493874A (en) * | 1983-03-08 | 1985-01-15 | Tokyo Shibaura Denki Kabushiki Kaisha | Production of a magnetic powder having a high dispersibility |
JPS59175707A (ja) * | 1983-03-26 | 1984-10-04 | Toda Kogyo Corp | 磁気記録用板状Baフエライト微粒子粉末及びその製造法 |
JPS6081804A (ja) * | 1983-10-12 | 1985-05-09 | Toda Kogyo Corp | 磁気記録用六角板状Baフエライト微粒子粉末及びその製造法 |
JPS6095902A (ja) * | 1983-10-31 | 1985-05-29 | Toda Kogyo Corp | 磁気記録用板状Baフエライト微粒子粉末の製造法 |
JPS60137002A (ja) * | 1983-12-26 | 1985-07-20 | Toda Kogyo Corp | 磁気記録用板状Baフエライト微粒子粉末の製造法 |
US4584242A (en) * | 1984-05-31 | 1986-04-22 | Toda Kogyo Corp. | Plate-like barium ferrite particles for magnetic recording and process for producing the same |
-
1986
- 1986-01-29 JP JP61018833A patent/JPS62176921A/ja active Pending
-
1987
- 1987-01-28 US US07/007,760 patent/US4752407A/en not_active Expired - Lifetime
- 1987-01-28 KR KR870000751A patent/KR870007536A/ko not_active Application Discontinuation
- 1987-01-29 EP EP87300784A patent/EP0231128B1/de not_active Expired - Lifetime
- 1987-01-29 DE DE8787300784T patent/DE3774584D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR870007536A (ko) | 1987-08-20 |
JPS62176921A (ja) | 1987-08-03 |
EP0231128A3 (en) | 1988-09-21 |
EP0231128A2 (de) | 1987-08-05 |
US4752407A (en) | 1988-06-21 |
EP0231128B1 (de) | 1991-11-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3871416D1 (de) | Mischvorrichtung und verfahren zu ihrer herstellung. | |
DE3780263D1 (de) | Imidazopyridinverbindungen und verfahren zu ihrer herstellung. | |
DE3682874D1 (de) | Pyranoindolizinderivate und verfahren zu ihrer herstellung. | |
DE3869701D1 (de) | Diffusions- und/oder filtrationsvorrichtung und verfahren zu ihrer herstellung. | |
DE3866744D1 (de) | Copolyaether-imide und verfahren zu ihrer herstellung. | |
DE3669758D1 (de) | Sicherungsmutter und verfahren zu ihrer herstellung. | |
DE3782994D1 (de) | Erythromycin-a-derivate und verfahren zu ihrer herstellung. | |
DE3782952D1 (de) | Supraleitende dipolmagnete und verfahren zu deren herstellung. | |
DE3381627D1 (de) | Cephemverbindungen und verfahren zu ihrer herstellung. | |
DE3878475D1 (de) | Organopolysiloxanemulsion und verfahren zu ihrer herstellung. | |
DE3878880D1 (de) | Metall-keramik-verbindung und verfahren zu ihrer herstellung. | |
DE3773008D1 (de) | Plaettchenfoermige bariumferritteilchen fuer magnetische aufzeichnung und verfahren zu ihrer herstellung. | |
DE3880287D1 (de) | Chlortrifluoraethylen-telomere und verfahren zu ihrer herstellung. | |
DE3776284D1 (de) | Hydrolase und verfahren zu ihrer herstellung. | |
DE3879335D1 (de) | Trifluorbenzolverbindungen und verfahren zu ihrer herstellung. | |
DE3685209D1 (de) | Urease und verfahren zu deren herstellung. | |
DE3765181D1 (de) | Isocarbacycline und verfahren zu ihrer herstellung. | |
DE3774584D1 (de) | Plaettchenfoermige bariumferritteilchen und verfahren zu ihrer herstellung. | |
DE3779946D1 (de) | Antibiotikum a42125 und verfahren zu dessen herstellung. | |
DE3685013D1 (de) | Amino-trifluormethylpyridinverbindung und verfahren zu ihrer herstellung. | |
DE3673515D1 (de) | Gonatrien-derivate und verfahren zu ihrer herstellung. | |
DE3762128D1 (de) | Polymerisierbare beta-glycerophospholipide und verfahren zu ihrer herstellung. | |
DE3778517D1 (de) | 7-brom-beta-carbolin-derivate und verfahren zu ihrer herstellung. | |
DE3581161D1 (de) | Ferrimagnetische teilchen und verfahren zu ihrer herstellung. | |
DE3677259D1 (de) | Chinazolinonverbindungen und verfahren zu ihrer herstellung. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |