Abstract
Graphene was incorporated into polyimide resin to obtain Polyimide-Graphene polymer sheet via in-situ polymerization method. FeCoB nanoparticles, generated by a high energetic cluster deposition system, were then deposited on the Polyimide-Graphene sheets by electric field assisted deposition technology to form FeCoB/Polyimide-Graphene ternary composites. An electric field of about 5–30 kV was applied on the sample platform when the composites were manufactured. The strong magnetic properties of the composites were revealed by the measurement of hysteresis loops at room temperature. Then the laminated FeCoB/Polyimide(-Graphene) composites were used to perform reflection loss scan. It is found that the addition of a small amount of graphene promote the improvement of electromagnetic properties by increasing dielectric loss. And the cover of FeCoB films can dramatically enhance the microwave absorption capacity by enriching interfacial polarization effect and electromagnetic match. The results prove that the electric field assisted deposition technique is a very attractive avenue to enhance the microwave absorption performance of the ternary composite expressed by tuning their dielectric and magnetic properties.
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