Study On Mieroweave Absorption Performance Base On Perrite And Carbon Nanotubes

Carbon nanotube (CNT) has attracted substantial interest for its use in microwavestealth field, it possesses many superior properties, e.g. high dielectric loss and uniquenano performance. CNT after the surface treatment, such as Ni-plating, could presenthigh permeability and possess the ferromagnetic performance. This kind of CNT hasbetter microwave absorption performance than that of traditional ferromagneticmaterials, offering foundation for the further use in microwave stealth area.This dissertation covers two kinds of microwave absorbing materials based on themicrowave absorbing mechanisms. Firstly the traditional ferromagneticmaterials/nitride rubber buna (NBR) composite has been fabricated with a thickness1mm, the microwave absorption performance has been measured and the absorbingcharacteristics were analyzed. Secondly, the mechanisms of Ni-plated CNT and thefactors that affect the quality of Ni-plated CNT have been investigated. Scanningelectron microscope (SEM), X-ray diffraction (XRD) and vector network analyzerwere used to characterize the morphology, crystal structure and electromagneticparameters respectively. It’s found that the absorbing bandwidth of CNT has beenwidened after Ni plated and the absorbing performance was improved, there was aremarkable peak of the magnetic loss, it implies that the magnetic loss performance hasbeen improved.