| 摘要 |
PURPOSE:To obtain a magnetic material which assures low iron loss even in use at a frequency higher than 200kHz by adding the specified amounts of SnO2 and Li2CO3 to a material including the specified amounts of MnO, ZnO, Fe2O3, CaO and SiO2. CONSTITUTION:SnO2 of 0.50-1.00wt% and Li2CO3 of 0.09wt% (except for 0%) are added to the low-loss oxide magnetic material including, as the main elements, MnO of 30-37mol%, ZnO of 10-15mol% and Fe2O3 (remainder) and also including, as the sub-material, CaO of 0.04-0.10wt% and SiO2 of 0.015-0.100wt%. Thereby, a low-loss oxide magnetic material which sufficiently satisfies various characteristics required for switching power supply material and realizes power loss lower than that of the existing material at a frequency higher than 200kHz can be provided. This material is just suited for magnetic core material for high frequency and realizes reduction in size and light weight of transformer. |
