| 摘要 |
PURPOSE:To enhance smoothness of the surface of a carrier by incorporating a specified amt. of one or both of oxides of Li and Ag in an Mg-Zn type ferrite contg. specified amts. of Fe2O3, MgO, and ZnO. CONSTITUTION:Spherical pellets are formed by incorporating on or both of oxides of Li and Ag in an Mg-Zn type ferrite compsn. contg. 45-65mol% Fe2O3, 26-32mol% MgO, and 18-22mol% ZnO, further in an amt. of 0.01-6wt%, mixing it with a binder, a dispersing agent, water or an org. solvent, etc., to form a slurry, and spray drying it. In these steps, the specific gravity of the pellet powder can be properly controlled, and a state of dispersion of void holes can be adjusted to a desired form. The obtained spherical particles are burned in a kiln or a furnace and classified by screening to obtain a carrier material having a desired particle size distribution. |
