Nanoscale · 2014 · 89 citations · 28 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ChemistryMicrowave EngineeringNanomaterialsCarbon NanotubesComposite MaterialsDielectricsMicrowave MaterialsNanocompositesNanotubesBandwidthCarbon Nanotube CompositesCharacteristic ImpedanceConjugated PolymersMechanical StrengthMicrowave Absorbing MaterialsMicrowave AbsorptionMulti-walled Carbon Nanotubes
Ferromagnetic γ-Fe2O3 nanoparticles were successfully loaded into multi-walled carbon nanotubes (MWNTs) as probed by transmission electron microscopy. Upon incorporation of the γ-Fe2O3-MWNTs into poly(p-phenylenebenzobisoxazole) (PBO), a conjugated polymer with high mechanical strength and outstanding thermal and oxidative stability, microwave absorbing materials were obtained. Attributed to the special structure of the γ-Fe2O3-MWNTs, synergistic effects on dielectric loss and magnetic loss, and a better matched characteristic impedance of the composites were achieved. The optimal minimum reflection loss reached -32.7 dB at 12.09 GHz on a composite containing 12 wt% γ-Fe2O3-MWNTs with a thickness of 2.7 mm, and the corresponding bandwidth below -5 dB was 6.2 GHz. This demonstrated its potential applications as a low-density microwave absorbing material operating under extreme environments.
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Genban Sun, Bingxiang Dong, Minhua Cao et al. · Chemistry of Materials · 2011 · 981 citations
Natural Sciences, Materials Engineering, Materials Science +17