Magnetic powder and method of manufacturing the same
AssigneeFUJIFILM Corporation
InventorsKazufumi Omura, Masahiko Mori
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Abstract
An aspect of the present invention relates to a method of manufacturing magnetic powder, which comprises adding an alkali metal salt compound comprising a substituent selected from the group consisting of an alkali metal salt of a carboxyl group and an alkali metal salt of a hydroxyl group to a water-based magnetic liquid comprising magnetic particles dispersed in an acidic water-based solvent to cause the magnetic particles to aggregate in the water-based magnetic liquid; and collecting the aggregated magnetic particles to obtain the magnetic powder.
Claims9
A method of manufacturing a magnetic recording medium, which comprises:
- manufacturing magnetic powder by a manufacturing method comprising:
- adding an alkali metal salt compound comprising a substituent selected from the group consisting of an alkali metal salt of a carboxyl group and an alkali metal salt of a hydroxyl group to a water-based magnetic liquid comprising magnetic particles dispersed in an acidic water-based solvent to cause the magnetic particles to aggregate in the water-based magnetic liquid;
- and
- collecting the aggregated magnetic particles to obtain the magnetic powder;
- dispersing the magnetic powder that has been manufactured together with an organic solvent and a binder to prepare a magnetic coating material;
- and
- forming a magnetic layer with the magnetic coating material that has been prepared.
Dependencies are inferred from the claim text.