Manganese zinc group ferrite for ferrite cores used in transformers of electric power unit, contains predetermined amount of oxides of iron, zinc, manganese, calcium, silicon and nickel

摘要

The manganese zinc group (MnZn) ferrite contains 52.5-54 mol% of iron oxide (by Fe2O3 conversion), 7.7-10.8 mol% of zinc oxide (by ZnO conversion), 350-700 ppm of silica (by SiO2 conversion), 60-140 ppm of calcium oxide (by CaO conversion), 4500 ppm or less or nickel oxide (by NiO conversion) and remainder of manganese oxide as principal component.