Magnetic Properties of Iron Core Compacted Powders Coated with Magnetic Insulative Film

Abstract

To improve the permeability and magnetic flux density of a powder magnetic core, we examined iron core compacted powders coated with spinel ferrite particles. Their permeability and magnetic flux density are higher than those of iron core compacted powders coated with nonmagnetic insulative film having equal resistivity: 1.4 T magnetic flux density B_2k, 7.79 Mg/m³ green density, and 70 µΩ·m resistivity were achieved.