Fe_(78)Si_9B_(13)非晶磁粉芯工艺

研究了粉末制备方法、粉末粒度、绝缘剂添加量等因素对Fe78Si9B13非晶磁粉芯性能的影响.结果表明,气流磨法得到的粉末比机械法得到的粉末棱角少,多数粉末呈圆片状,利于绝缘包覆,因此,其粉芯磁性能比后者高;粉末粒度越大磁粉芯磁导率越高,但是损耗也越大,所以需要粒级调配,最终确定最佳配比为75~100μm占70%,61~75μm占10%,45~61μm占20%.添加绝缘剂可提高粉末的固有电阻,降低涡流损耗.但绝缘剂含量过大时会降低粉芯的磁导率,本实验确定最佳添加量为4%.

Technology of Fe78Si9B13Amorphous Magnetic Powder Core

The effects of powder preparation method,powder size and the addition amount of insulation agent on the performance of Fe78Si9B13 amorphous powder core were investigated.The results showed that the powders prepared by jet milling have fewer edges than those prepared by mechanical method.Most of the powders are roundel,which is more beneficial to insulation coating,so the properties are better.The powder grain size is greater,the magnetic powder core permeability is bigger,but the loss is bigger.As a result grain level deployment is needed.The best ratio is determined to be 70% of 75～100 μm powders,10% of 61～75 μm powders,and 20% of 45～61 μm powders.The addition of insulation agent can improve the inherent resistance and reduce powder eddy loss,but too much insulation agent content will reduce the permeability.The optimal addition amount is 4% in this experiment.