摘要
利用Na2SiO3水溶液对羰基铁粉(Fe)和FeSiCrB纳米晶合金粉进行表面绝缘处理,制备不同质量比Fe/FeSiCrB的复合磁心,考察了两种磁粉质量比对复合磁心微观结构、磁性能和力学性能的影响。随着羰基铁粉占比的增大,复合磁心的密度提高、内部孔隙率降低,有效磁导率相应提高,直流偏置性能呈现小幅降低,压溃强度增大。当Fe:FeSiCrB质量比为6:4时,复合磁心在1 MHz处有效磁导率为33.9,在100 Oe偏置场作用下μ(H)/μ(0)为86.4%。基于上述复合磁心的一体成型电感仿真结果显示,电感值随着羰基铁粉占比增大相应提高,同时电感外部的漏感能量分布比例逐渐降低。
Carbonyl iron powders(Fe)and FeSiCrB nanocrystalline alloy powders were insulated by Na2SiO3 aqueous solution,respectively,and then Fe/FeSiCrB composite cores with different mass ratios were prepared.The effects of mass ratios of the two kinds of magnetic powders on the microstructure,magnetic properties and mechanical properties of the composite cores have been investigated.With increasing proportion of carbonyl iron powders,the density of the composite core increases,while the internal porosity decreases.The effective permeability increases correspondingly,but the DC-bias properties decreases slightly.Moreover,the crushing strength shows an obvious increase.When the mass ratio of Fe:FeSiCrB is 6:4,the effective permeability of the composite core is 33.9 at 1 MHz,and theμ(H)/μ(0)is 86.4%under 100 Oe DC-bias field,respectively.The simulation results of the molding inductors based on the above composite cores show that the inductance value increases with the increasing proportion of carbonyl iron powders,meanwhile the distribution proportion of leakage inductance energy outside the inductor decreases gradually.
作者
董博儒
覃维
王鲜
聂彦
冯则坤
龚荣洲
DONG Bo-ru;QIN Wei;WANG Xian;NIE Yan;FENG Ze-kun;GONG Rong-zhou(School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《磁性材料及器件》
CAS
CSCD
2021年第5期28-33,共6页
Journal of Magnetic Materials and Devices
关键词
软磁复合材料
羰基铁粉
纳米晶合金
磁导率
直流偏置
漏感
soft magnetic composite
carbonyl iron powder
nanocrystalline alloy
permeability
DC-bias properties
leakage inductance