| 摘要 |
PURPOSE:To provide a method of manufacturing an oxide magnetic material at high frequency, a low loss, and remaining magnetic density for use in a switching power supply, etc. CONSTITUTION:Fe, Mn, and Zn are mixed at a specific ratio in a type of a chloride solution, and sprayed and heat-dissolved in a spray calciner to form a mixed oxide powder comprising Fe2O3 71.5+ or -2%, MnO 22.5+ or -2%, and ZnO 6.0+ or -2%. Thereafter, they are heat-treated at 1000 deg.C or less and further SiO2 0.005 to 0.1%, CaO 0.01 to 0.5%, TiO2 0.01 to 0.5%, V2O5 0.005 to 0.1%, and Nb2O5 0.005 to 0.1% are used as sub-components and added simultaneously, and a calcine powder being controlled to be a mean particle diameter 0.3 to 1.0mum is used as a main material, and granulated and molded to burn at 1000 to 1200 deg.C. Thus, it is possible to obtain an oxide magnetic material having a small loss value, a great saturated magnetic flux density, and further small remaining magnetic flux density, suitable for a transformer material for a high frequency switching power supply. |
