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FeSiB、Fe75Ga6B15Nb3Cu1和Fe73.5Si7.5Nb3B9Cu1Ga6铁基磁粉芯的制备及其磁性能研究
Study on the Fe-based Magnetic Powder Cores of FeSiB,Fe75Ga6B15Nb3Cu1and Fe73.5Si7.5Nb3B9Cu1Ga6 Fe-based Core Magnetic Powders
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- DOI:
- 作者:
- 郭琦 邓志旺 朱乾科 陈峰华 胡勇 张克维
GUO Qi;DENG Zhiwang;ZHU Qianke;CHEN Fenghua;HU Yong;ZHANG Kewei
- 作者单位:
- 太原科技大学材料科学与工程学院 山西省磁电功能材料及其应用重点实验室
Taiyuan University of Science&Technology,School of Materials Science and Engineering,Taiyuan 030024,China;Shanxi Key Laboratory of Magnetoelectric Functional Material and Their Application,Taiyuan 030024,China
- 关键词:
- 磁粉芯 磁导率 磁损耗
magnetic powder magnetic power core permeability magnetic loss
- 摘要:
- 采用雾化法制备FeSiB粉末、机械球磨法制备Fe75Ga6B15Nb3Cu1粉末和Fe73.5Si7.5Nb3B9Cu1Ga6粉末,将这3种合金粉末压制成型得到磁粉芯。利用X射线衍射仪(X-ray diffraction,XRD)、振动样品磁强计(Vibrating Sample Magnetometer,VSM)和软磁交流分析仪对退火前后磁粉芯的相组成和磁性能进行检测分析。结果表明:未退火状态下3种粉末均发生略微晶化,矫顽力较大,饱和磁感应强度较低。随着绝缘剂包覆量的增加,退火后磁粉芯的密度、饱和磁感应强度、磁导率、磁损耗均降低,1%为最佳的绝缘剂包覆含量。而磁粉芯成型压强的增大,会导致磁粉芯的密度、饱和磁感应强度和磁导率增加,磁损耗降低,2000 MPa为最佳成型压强。在绝缘剂包覆量为1%,成型压强为2000 MPa时,退火后3种磁粉芯均发生明显的晶化且饱和磁感应强度和有效磁导率较高,磁损耗较低。其中,Fe75Ga6B15Nb3Cu1磁粉芯的有效磁导率最高,约为69.4,其磁损耗最低。综上所述,Fe75Ga6B15Nb3Cu1磁粉芯磁性能较为优异,是一种理想的复合软磁材料。The three kinds of powders,which are FeSiB powders produced by atomization technology,Fe75Ga6 B15Nb3 Cu1 powders and Fe73.5Si7.5Nb3 B9 Cu1 Ga6 powders prepared by mechanical ball grinding method,are pressed into core magnetic powders.X-ray diffraction,Vibrating sample magnetometerand Soft magnetic communication analyzer are used to analyze phase composition and magnetic properties of unannealed and annealed core magnetic powders.The results show that the three kinds of unannealed powders,which are slightly crystallized,lower saturation magnetization,and higher coercivity.The density,saturation magnetization,magnetic permeability,and magnetic loss of the annealed core magnetic powders will reduce,while the coating amount of the insulating agent increase,and the optimal coating content of the insulating agent is1 wt.%.The increase of the molding pressure of the core magnetic powders result in the higher density,saturation magnetization and magnetic permeability,and lower magnetic loss,2000 MPa is the optimal molding pressure.When the coating content of the insulating agent is 1 wt.%and the molding pressure is 2000 MPa,the three kinds of annealed core magnetic powders,which are totally crystallized,have higher saturation magnetization,higher the effective magnetic permeability and lower the magnetic loss.The Fe75Ga6 B15Nb3 Cu1 core magnetic powders have highesteffective permeability,which reaches 69.4 and have lowest magnetic loss.In summary,the Fe75Ga6 B15Nb3 Cu1 core magnetic powders have excellent magnetic properties,which is an ideal novel composite soft magnetic material.