Preparation and Magnetic Properties of Fe@SiO₂ Soft Magnetic Composites

Abstract:

In this work, the insulating SiO₂ was coated successfully on the surface of reduced iron particles by a sol-gel method to decrease the core loss at low frequency. The scanning electron microscope images and elements analysis confirm that the surface of iron powders particles were covered by a thin insulating layer in the form of uniform core-shell structure. The samples were annealed at 400 °C in N₂ atmosphere to obtain better magnetic properties. The annealed SMCs with 10 mL/h dropping rate of TEOS have optimum magnetic properties with low core loss P_s of 280.89 W/kg and high saturation magnetic flux density B_s of 1.038 T at 1000 Hz.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 638-645
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.638
• Online since: May 2020
• Authors: Shuai Feng, Yan An, Zong Xiang Wang, Kai Sun*, Run Hua Fan
• Keywords: Core-Shell Structure, Magnetic Properties, Soft Magnetic Materials

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