In this study, we demonstrate a hybrid multimodal soft magnetic composite (SMC) comprising gas-atomized spherical amorphous powder (AP) and carbonyl-iron powder (CIP), and present its enhanced electromagnetic properties. CIP is selectively incorporated into voids between AP, and deforms during compression, effectively reducing the pores, resulting in high packing density of the core, where CIP magnetically bridges AP and helps magnetic domain rotation much efficiently. The hybrid SMC with the addition of 20 wt.% CIP showed constant effective permeability of 57 up to 1 MHz, a remarkable 63% increase compared with the AP core, while DC bias superimposing retention level of 61% was secured with the help of high magnetization of CIP. In addition, the effect of SiO2 surface insulation, prepared by the sol-gel process, on the high-frequency magnetic properties of hybrid SMCs, was also evaluated. It is thus revealed that the high-frequency dynamic loss of the hybrid core, originating from intra-particle eddy current loss and anomalous loss component, and inter-particle eddy currents are negligibly small. We believe that our approach using AP/CIP multimodal hybrid SMCs is an effective way of achieving high permeability as well as high DC bias characteristics at high frequencies. This process will be highly beneficial for the miniaturization of power inductors.

中文翻译：

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通过在颗粒间空隙中选择性掺入羰基铁粉实现铁基非晶粉芯的增强渗透性

在这项研究中，我们展示了一种包含气体雾化球形无定形粉末 (AP) 和羰基铁粉末 (CIP) 的混合多峰软磁复合材料 (SMC)，并展示了其增强的电磁性能。CIP 选择性地结合到 AP 之间的空隙中，并在压缩过程中变形，有效地减少孔隙，导致核心的高填充密度，其中 CIP 磁性桥接 AP 并有效地帮助磁畴旋转。添加了 20 wt.% CIP 的混合 SMC 在高达 1 MHz 的频率下显示出 57 的恒定有效磁导率，与 AP 磁芯相比显着增加了 63%，而在高频率的帮助下确保了 61% 的直流偏置叠加保持水平。 CIP 的磁化。此外，通过溶胶-凝胶工艺制备的 SiO2 表面绝缘的效果，还评估了混合 SMC 的高频磁性能。因此表明，源自粒子内涡流损耗和异常损耗分量以及粒子间涡流的混合核的高频动态损耗小到可以忽略不计。我们相信，我们使用 AP/CIP 多峰混合 SMC 的方法是在高频下实现高磁导率和高直流偏置特性的有效方法。该工艺将有利于功率电感器的小型化。我们相信，我们使用 AP/CIP 多峰混合 SMC 的方法是在高频下实现高磁导率和高直流偏置特性的有效方法。该工艺将有利于功率电感器的小型化。我们相信，我们使用 AP/CIP 多峰混合 SMC 的方法是在高频下实现高磁导率和高直流偏置特性的有效方法。该工艺将非常有利于功率电感器的小型化。