COMPOSITE MAGNETIC BODY AND METHOD FOR PRODUCING THE SAME

摘要

A composite magnetic body is obtained by mixing Fe-Al-Si metal magnetic powders composed of 5.7 wt%=Al=8.5 wt%, 6.0 wt%=Si=9.5 wt%, and reminder Fe and an insulating binder, pressure-molding the mixed powders, and heat-treating the molding at a temperature of 600°C or more and 900°C or less. The sign of a crystal magnetic anisotropic constant of a metal magnetic powder in the composite magnetic body is negative at room temperature, and the sign of a magnetostriction constant is positive at room temperature. The temperature coefficient of a core loss at room temperature is negative. The composite magnetic body improves the temperature property of core loss, and has an excellent soft magnetic property with low loss and high magnetic permeability.