摘要
以微米级铁粉为原料,通过调控氮化温度,成功制备了一系列微米级铁氮化物磁粉,并对铁氮化物物相转化机制及磁性能进行了研究。结果表明,氮化温度直接影响氮化产物的物相组成,当氮化时间为10 h,氮化温度为300℃、400℃、500℃和600℃时所制备的粉末产物分别为Fe/Fe_(4)N复合物、Fe_(2)N、Fe_(3)N和Fe_(4)N。不同物相结构样品的磁结构、晶粒尺寸、磁晶各向异性、电阻率均不相同,由此决定了相应粉芯样品的磁性能随氮化温度升高呈现出不同变化规律。其中,氮化温度600℃对应的单相Fe_(4)N粉芯表现出较高的磁导率、相对最低的磁损耗、较高的饱和磁化强度(187.58 emu/g)和良好的直流偏置性能(直流偏置场为200 Oe时的有效磁导率百分比为89.36%),是一种在高频和高功率密度场景具有应用潜力的新型软磁材料。
A series of micron-sized magnetic iron nitride powders were prepared from micron-sized iron powders by adjusting the nitriding temperature.Phase transformation mechanism and magnetic properties of iron nitride were studied.It was found that nitriding temperature directly affects the phase composition of nitriding products.When the nitriding time is 10 h and the nitriding temperatures are 300℃,400℃,500℃and 600℃,the corresponding products are Fe/Fe_(4)N composite,Fe_(2)N,Fe_(3)N and Fe_(4)N,respectively.The powders with different phase structures have different magnetic structures,grain sizes,magnetocrystalline anisotropic fields and resistivities,which determines that the magnetic properties of the corresponding powder cores show different changes with the increase of nitriding temperature.Single-phase Fe_(4)N powder core corresponding to the nitriding temperature of 600℃ exhibits a moderate permeability,the relatively lowest magnetic loss,a high saturation magnetization(187.58 emu/g)and a good DC-bias performance(the effective permeability percentage at 200 Oe is 89.36%).This innovative soft magnetic material holds immense potential for applications in high frequency and high power density environments.
作者
徐澎鹏
黄紫怡
张华
张学斌
刘伟
邹中秋
苏海林
XU Peng-peng;HUANG Zi-yi;ZHANG Hua;ZHANG Xue-bin;LIU Wei;ZOU Zhong-qiu;SU Hai-lin(School of Materials Science and Engineering and Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices,Hefei University of Technology,Hefei 230009,China;Huaibei Red Magneto-electric Technology Co,Ltd,Huaibei 241002,China;Huaian Engineering Research Center of Soft Magnetic Powder Cores and Devices,Jiangsu Red Magnetic Materials Incorporation,Xuyi 211700,China)
出处
《磁性材料及器件》
2025年第2期1-7,共7页
Journal of Magnetic Materials and Devices
基金
淮安市重点研发计划(HAG202114)。
关键词
金属软磁粉芯
铁氮化物
Fe_(4)N
电阻率
高频磁性能
soft magnetic powder core
iron nitrides
Fe_(4)N
resistivity
high-frequency magnetic properties
