METHOD FOR MANUFACTURING HEXAGONAL FERRITE AND MAGNETIC RECORDING MEDIUM USING THE SAME
PROBLEM TO BE SOLVED: To provide a method for manufacturing a hexagonal ferrite powder, in which a magnetic recording medium having superior electromagnetic transducing characteristic, superior still durability and superior running durability with respect to head contamination can be obtained, and t...
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| creator | JINBO NOBORU |
| description | PROBLEM TO BE SOLVED: To provide a method for manufacturing a hexagonal ferrite powder, in which a magnetic recording medium having superior electromagnetic transducing characteristic, superior still durability and superior running durability with respect to head contamination can be obtained, and to provide a magnetic recording medium, using the ferrite powder. SOLUTION: In the method for manufacturing the hexagonal ferrite powder, a process, in which a hexagonal ferrite powder having 10 to 40 nm average particle size and 135 to 400 kA/m coercive force Hc is treated in a slurry state with an organic phosphorous compound, one end of the bivalent organic group of which has a group derived from phosphoric acid and the other end of which has an amino group or a group having an alcoholic hydroxy group, is included. The ferrite power is used for the magnetic recording medium. COPYRIGHT: (C)2003,JPO |
| format | Patent |
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SOLUTION: In the method for manufacturing the hexagonal ferrite powder, a process, in which a hexagonal ferrite powder having 10 to 40 nm average particle size and 135 to 400 kA/m coercive force Hc is treated in a slurry state with an organic phosphorous compound, one end of the bivalent organic group of which has a group derived from phosphoric acid and the other end of which has an amino group or a group having an alcoholic hydroxy group, is included. The ferrite power is used for the magnetic recording medium. 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SOLUTION: In the method for manufacturing the hexagonal ferrite powder, a process, in which a hexagonal ferrite powder having 10 to 40 nm average particle size and 135 to 400 kA/m coercive force Hc is treated in a slurry state with an organic phosphorous compound, one end of the bivalent organic group of which has a group derived from phosphoric acid and the other end of which has an amino group or a group having an alcoholic hydroxy group, is included. The ferrite power is used for the magnetic recording medium. 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SOLUTION: In the method for manufacturing the hexagonal ferrite powder, a process, in which a hexagonal ferrite powder having 10 to 40 nm average particle size and 135 to 400 kA/m coercive force Hc is treated in a slurry state with an organic phosphorous compound, one end of the bivalent organic group of which has a group derived from phosphoric acid and the other end of which has an amino group or a group having an alcoholic hydroxy group, is included. The ferrite power is used for the magnetic recording medium. COPYRIGHT: (C)2003,JPO</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ELECTRICITY INDUCTANCES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INORGANIC CHEMISTRY MAGNETS METALLURGY PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS |
| title | METHOD FOR MANUFACTURING HEXAGONAL FERRITE AND MAGNETIC RECORDING MEDIUM USING THE SAME |
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