Title :
EMI Shielding Characteristics of Expanded Graphite/Novolac Phenolic Resin Composite for Applications in Wireless Communication
Author :
Gogoi, Jyoti Prasad ; Bhattacharyya, Nidhi Saxena
Author_Institution :
Dept. of Phys., Tezpur Univ., Tezpur, India
Abstract :
Expanded graphite (EG) flakes are synthesized from natural graphite flakes of size ~2 μm employing chemical oxidation and thermal treatment method. The surface morphology and structural characterization of EG flakes are investigated using scanning electron microscope and X-ray diffraction respectively. EG flakes are mechanically mixed with novolac phenolic resin (NPR) in different weight ratios (30 wt%, 40 wt % & 50 wt %) and compressed with thermal treatment to develop expanded graphite/novolac phenolic resin(EG/NPR) composites. Shielding effectiveness (SE) of developed composites measured in the frequency range of 8 to 12 GHz shows a maximum values of -48 dB for 50 wt% EG/NPR composites.
Keywords :
X-ray diffraction; electromagnetic interference; electromagnetic shielding; graphite; organic compounds; radiocommunication; resins; scanning electron microscopes; surface morphology; EG flake; EMI shielding characteristics; X-ray diffraction; chemical oxidation; expanded graphite; expanded graphite-novolac phenolic resin composite; frequency 8 GHz to 12 GHz; natural graphite flake; scanning electron microscope; shielding effectiveness; structural characterization; surface morphology; thermal treatment; thermal treatment method; wireless communication; Electromagnetic interference; Pollution measurement; Polymers; Resins; Scanning electron microscopy; X-ray diffraction;
Conference_Titel :
Devices and Communications (ICDeCom), 2011 International Conference on
Conference_Location :
Mesra
Print_ISBN :
978-1-4244-9189-6
DOI :
10.1109/ICDECOM.2011.5738512
