钝化剂加入量对铁硅粉末绝缘包覆形貌及磁芯损耗的影响  

Effect of passivator dosage on insulation coating morphology and core loss of Fe-Si powder core

作　　者：李伟健 段金柱[1] 邢冰冰[1] 盖鹏祥 LI Wei-jian;DUAN Jin-zhu;XING Bing-bing;GE Peng-xiang(TDG Holding Co,Ltd,Haining 314400,China)

机构地区：[1]天通控股股份有限公司,浙江海宁314400

出　　处：《磁性材料及器件》2023年第1期89-93,共5页Journal of Magnetic Materials and Devices

摘　　要：以气雾化铁硅粉末为原料,利用自制的复合钝化剂对粉末进行不同条件钝化,并压制成磁(芯)环。采用扫描电镜观察钝化粉末的表面形貌,并测试磁环性能。结果表明,粉末经过复合钝化后,可以形成絮状的绝缘包覆膜层。钝化粉末压制的磁环密度、磁导率随着钝化剂加入量的增加而降低,直流叠加随着钝化剂加入量的增加而增加。磁芯损耗随着钝化剂加入量的增加先降低后升高,低频损耗低至550 kW/m3,以磁滞损耗为主。铁硅材料损耗较高,因此采用损耗分离进行数据拟合误差较小。铁硅磁芯室温及高温条件下损耗接近,说明损耗的温度稳定性比较好。The atomized iron silicon powder was passivated under different conditions with self-made compound passivator and pressed into magnetic(core)ring.The surface morphology of passivated powder was observed by scanning electron microscope and the magnetic ring properties were tested.The results show that flocculent insulating film can be formed after compound passivation.The magnetic ring density and magnetic permeability of passivating powder decreased with the increase of passivating agent,while the DC superposition increased with the increase of passivating agent.The core loss decreases first and then increases with the addition of passivator,and the low frequency loss is as low as 550 kW/m3,mainly hysteresis loss.The loss of iron and silicon materials is high,so the error of data fitting by loss separation is small.The loss of Fe-Si core at room temperature is similar to that at high temperature,indicating that the loss has good temperature stability.

关 键 词：铁硅粉末 钝化剂 磁芯 损耗 

分 类 号：TM271.2[一般工业技术—材料科学与工程]