| 摘要 |
PURPOSE:To achieve a low power loss by a method wherein SiC and CaO are added to main composition composed of specific contents of Fe2O3, MnO and ZnO and, further, one or more small quantity additives among various oxides are added. CONSTITUTION:0.001-0.030wt.% of SiC and 0.02-0.30wt.% of CaO are added to basic composition composed of 52.0-54.7mol% of Fe2O3, 31-40mol% of MnO and 6-15mol% of ZnO and, further, specific respective contents of one or more small quantity additives among niobium oxide, titanium oxide, antimony oxide, tantalum oxide, vanadium oxide, zirconium oxide, tin oxide, aluminum oxide, cobalt oxide, copper oxide, hafnium oxide and silicon oxide to obtain Mn-Zn based ferrite. With this constitution, an Mn-Zn based ferrite core which shows little power loss can be obtained as the transformer core for various radio frequency power supplies such as a switching power supply. |
