| 摘要 |
PURPOSE:To make it possible to obtain a low loss oxide magnetic material having a low iron loss even when the material is used at high frequency by a method wherein potassium oxide of 0.15wt.% or less is added as an additive. CONSTITUTION:The potassium oxide (K2O) of 0.15wt.% or less (does not contain 0%) is added to the low loss oxide magnetic material mainly composed of manganese monoxide (MnO) of 30-37mol%, zinc oxide (ZnO) of 10-15mol%, and ferric oxide (Fe2O3) for the remainder, and also containing subsidiary components of calcium oxide (CaO) of 0.04-0.10wt.% and silicon oxide (SiO2) of 0.05-0.100wt.%. Besides, when the quantity of the additive of potassium becomes larger than 0.015wt.%, the powder loss becomes larger than that of the magnetic material containing no additive K2O. As a result, the reduction in power loss can be achieved in the high frequency of the frequency of 100kHz or above. |
