| 摘要 |
PURPOSE:To obtain an Mn-Zn soft ferrite with a uniform crystal organization and a crystal grain boundary as well as an improved magnetic characteristics and a low iron loss value by adding an aqueous solution Ca compound as a Ca source and an aqueous solution Si compound as SiO2 source to a calcination blend material consisting of Fe2O3, Mno and Zno obtained at the calcination process and then grinding-mixing it in water slurry shape. CONSTITUTION:Fe2O3 is used as a main material and the one where Mn and Zn oxides (ZnO and Zn3O4) are mixed by a specified amount is ground and mixed by a ball mill or a vibrating mill and then is calcined. Then, with a calcination powder as 50 to 70% concentration water slurry, grinding mixing is made at warm temperature using a device such as the ball mill, attriter, etc. Aqueous solution CaCl2 and Si compound are blended as CaO and SiO2 sources, which are added by a specified amount as an aqueous solution to this grinding mixing process. These additives become CaO and SiO2 due to oxidation on calcination, are deposited in a thin film shape at a grain boundary of a sintered body, and increases grain boundary resistance, thus efficiently operating on reducing iron loss in high-frequency range. |
