| 摘要 |
PURPOSE:To obtain magnetic powder with which dispersion processes are easy and a degree of dispersion is excellent by a method wherein at least a group IIa element and a group IIIb element exist on a surface of a hexagonal ferrite magnetic powder. CONSTITUTION:A magnetic powder surface is coated with a group IIIb element and a group IIa element. Incidentally, the group IIa element is selected out of Be, Mg, Ca, Sr, Ra and Ba. Further, it is possible to enhance a wetting characteristic and affinity between magnetic powder and a solvent without reducing attraction activation marks enhancing a dispersion easiness of magnetic powder. As a result, it is possible to enhance not only a dispersion easiness but also a degree of dispersion, an orientation and an electric characteristic. |
