High frequency complex permeability of flake-shaped Fe74Cr2Mo2Sn2P10Si4B4C2 particle composite material

A composite consisting of flake-shaped Fe74Cr2Mo2Sn2P10Si4B4C2 particles was prepared. The flake-shaped particles included in the composite were prepared by planetary ball milling. The complex permeability of the composite material was measured at frequency range from 10 MHz to 8.5 GHz. The permeability of the composite containing flake-shaped particles was much higher than that of the spherical particles. The permeability of particles was improved by means of heat-treatment. In contrast to the random-spatial-distributed flake-shaped particle composites, the oriented-distributed ones had a higher effective permeability. A model was proposed considering the orientation ratio, and our calculation agreed well with the experimental data.