摘要 |
PURPOSE:To obtain a low loss oxide magnetic material ensuring a small loss even in use at such high switching frequency as >=100kHz and capable of being put to practical use. CONSTITUTION:This magnetic material contains, by mol, 50-56% Fe2O3, 30-45% MnO and 5-20% ZnO as principal components and further contains, by weight, 0.03-0.1% CaO, <=0.05% SiO2, <=0.4% TiO2 and <=0.7% La2O3 as subsidiary components. |