Abstract In this study, phytic acid (PA) surface treatment was used to prepare iron-based soft magnetic composites (SMCs). The composition and microstructure of the SMCs were analyzed to assess changes in the magnetic properties. As the treatment time increased, the insulating layer on the powder surface gradually thickened, changing the internal morphology and conductive path of the annular samples after compacting. The changes in the magnetic properties and core loss were attributed to the increased resistivity and enhancement of the magnetic dilution effect. The optimal soft magnetic performance (μm = 389, Pt = 235.1 mW/g measured at 100 kHz and 50 mT) was obtained by adjusting the processing time. This reduces the loss by 52.96% compared to the untreated sample and improves the application potential of soft magnetic composites at medium and high frequencies.

中文翻译：

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植酸表面处理制备铁基软磁复合材料的磁性能

摘要 本研究采用植酸（PA）表面处理制备铁基软磁复合材料（SMCs）。分析了 SMC 的组成和微观结构以评估磁性的变化。随着处理时间的增加，粉末表面的绝缘层逐渐增厚，改变了压实后环形样品的内部形貌和导电路径。磁性和磁芯损耗的变化归因于电阻率的增加和磁稀释效应的增强。通过调整处理时间获得最佳软磁性能（μm = 389，Pt = 235.1 mW/g，在 100 kHz 和 50 mT 下测量）。这将损失减少了 52。