| 摘要 |
PURPOSE:To obtain cubic barium hexaferrite having 0.07-0.08mum of mean particle diameter by agitating polyvalency alcohol in which salt is dissolved and polyvalency alcohol in which small oxide alkali is dissolved, water-heat- treating the mixture, cleaning and drying its precipitate, surface treating it, and heat treating it. CONSTITUTION:Polyvalency alcohol solution in which iron and barium are dissolved and polyvalency alcohol solution in which hydroxide alkali having an equivalent or more with respect to the total amount of the iron and the barium are dissolved are mixed and agitated. Produced slurry is filled in an autoclave, and treated at 120-250 deg.C. Obtained precipitate is separated, cleaned and dried. The product is dipped in aqueous solution of silicon salt or aluminum salt, surface-treated, and then heattreated at 600-1000 deg.C. Thus, cubic barium hexaferrite having 0.07-0.08mum of mean particle diameter is obtained. |
