| 摘要 |
<p>PURPOSE:To provide spherical magnetic particles having homogeneity, high saturation magnetization and uniform particle diameter. CONSTITUTION:When magnetic particles are produced by dispersing magnetic powder in resin particles, the magnetic powder is composed of two or more kinds of magnetic powders different from each other in particle diameter. The particle diameter of the magnetic powder having the max. particle diameter is <=1mum and the ratio of the particle diameter of the magnetic powder having the max. particle diameter to that of the magnetic powder having the min. particle diameter is >=2.</p> |
