Estimation of Microwave Absorption Properties of RGO-SiC-LLDPE Composites

Abstract:

The present work investigate the microwave absorption properties of reduced graphene oxide (RGO)-Silicon carbide (SiC)-Linear low-density polyethylene (LLDPE) composites prepared in different concentration of fillers(10, 20, 30, 40 wt. %) with LLDPE matrix. Synthesis of RGO is confirmed from XRD analysis and SiC is used as received from supplier. Complex permittivity of the composites is measured using Nicolson Ross method showing an increasing trend with increasing filler concentrations with maximum and for 40 wt. % composite sample. Based on transmission line theory and using measured value of complex permittivity, conductor backed single and double layer absorber is designed by thickness optimization. The calculated reflection loss (RLc) value of ~-71 dB at 11.23 GHz is observed for 40 wt. % composite sample of 7 mm thickness with -10 dB absorption bandwidth of 1.48 GHz and -20 dB bandwidth of 0.64 GHz.

• Periodical: Advanced Materials Research (Volume 1165)
• Pages: 87-97
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1165.87
• Online since: July 2021
• Authors: Pankaj Bora, Utpaljyoti Mahanta, Jayanta Kumar Sarmah, Jyoti Prasad Gogoi*
• Keywords: Dielectric Response, Microwave Absorber, Reduce Graphene Oxide, Silicon Carbide, Transmission Line

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