Study on the Fe-based Magnetic Powder Cores of FeSiB,Fe75Ga6B15Nb3Cu1and Fe73.5Si7.5Nb3B9Cu1Ga6 Fe-based Core Magnetic Powders
Author of the article:GUO Qi;DENG Zhiwang;ZHU Qianke;CHEN Fenghua;HU Yong;ZHANG Kewei
Author's Workplace：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
Key Words：magnetic powder magnetic power core permeability magnetic loss
Abstract：
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.
