Hybrid carbonaceous materials for radar absorbing poly(vinylidene fluoride) composites with multilayered structures

Poly(vinylidene fluoride) (PVDF) based composites loaded with 3 wt% of carbon black (CB), graphite (GF), and the hybrid CB/GF (1.5/1.5 wt%) were prepared by melt mixing tested as microwave absorbing material at X-band frequencies (8–12 GHz). The materials processed pressed 220°C into plates 20 × 0.1 cm3. Dielectric magnetic properties evaluated using wave-guide accessory to simulate reflectivity single-layered PVDF through impedance matching behavior. best achieved composite material, whose maximum radiation attenuation ?33 dB 9.3 GHz was predicted 4 mm thickness. Afterwards, sandwiched structures (20 cm2 in size) one-layer honeycomb core two measured. PVDF/HB-honeycomb-PVDF/HB structure reached reflection loss = ?12 (Ea 94%) on a broadband frequency. has promising future lightweight cost-effective for both telecommunication stealth technology.