Abstract

In this study, polymer composites containing amorphous Fe­B particles with large particle size distribution were fabricated. A polymer composite of mixed particles showed a high relative permeability of ®r = 9.3 at 1GHz. In addition, the composite exhibited good microwave absorption properties (R.L. < 120 dB) in the frequency range of 0.6­1.1GHz for absorber thickness of 2.4­4.2mm. Thus, this polymer composite can be used for fabricating microwave absorbers that are effect in the 0.7­1.0GHz band, and would result in microwave absorbers thinner than any other microwave absorbers reported to date. [doi:10.2320/matertrans.MAW201203]

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