Novel three-phase composites with excellent electromagnetic wave absorption properties based on carbon black (CB) and BaTiO3 (BT) nanoparticles embedded into polyvinylidene fluoride (PVDF) using a simple blending and hot-moulding technique. When the composites have filler contents of CB 10 wt% and BT 5 wt%, the reflection loss can reach −38.8 dB at 9.2 GHz, and the reflection loss is less than −10 dB in the frequency range from 3.5 to 18.0 GHz with an absorber thickness of 1.5–5.0 mm. Compared to the two-phase composites of CB/PVDF and BT/PVDF, the three-phase composites showed superior absorption properties.

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http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b08809?journalCode=jpccck

This paper may be of interest to you

http://www.sciencedirect.com/science/article/pii/S2352710215300516

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THanks Alfonso...Looks interesting. I will look into it.

RG