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Title:
METHOD FOR MANUFACTURING HEXAGONAL FERRITE AND MAGNETIC RECORDING MEDIUM USING THE SAME
Document Type and Number:
Japanese Patent JP2003197413
Kind Code:
A
Abstract:

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.

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.


Inventors:
JINBO NOBORU
Application Number:
JP2001389938A
Publication Date:
July 11, 2003
Filing Date:
December 21, 2001
Export Citation:
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Assignee:
FUJI PHOTO FILM CO LTD
International Classes:
C01G49/00; G11B5/706; G11B5/842; H01F1/11; (IPC1-7): H01F1/11; C01G49/00; G11B5/706; G11B5/842
Attorney, Agent or Firm:
Shohei Oguri (4 outside)