New electromagnetic wave shielding effectiveness at microwave frequency of polyvinyl chloride reinforced graphite/copper nanoparticles
作者： A.A. Al-Ghamdi , Farid El-Tantawy
DOI: 10.1016/J.COMPOSITESA.2010.08.006
关键词: Dielectric 、 Permittivity 、 Fourier transform infrared spectroscopy 、 Composite material 、 Electromagnetic shielding 、 Materials science 、 Dissipation factor 、 Microstructure 、 Percolation threshold 、 Nanocomposite
摘要: A novel functional nanoconducting composite from polyvinyl chloride reinforced graphite-copper nanoparticles (PVC/GCu) was fabricated in order to produce a material suitable for electromagnetic interference (EMI) shielding applications. The microstructure of the nanocomposites investigated by means scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). thermal stability could improved with incorporation GCu nanoparticles. electrical conductivity increases increasing content within composites. percolation threshold composites is low about 2 wt.%. Hall-effect studies indicate that increase causes carrier concentration, mobility carriers behave as n-type semiconductor. showed high dielectric constant dissipation factor frequency range 1-20 GHz which makes it useful charge storing decoupling capacitors EMI effectiveness (SE) PVC/GCu tested over GHz, 22-70 dB efficiency obtained composites, suggesting they may be used an effective lightweight aerospace radar evasion
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