TITLE:
Correlation between Electrical Conductivity and Microwave Shielding Effectiveness of Natural Rubber Based Composites, Containing Different Hybrid Fillers Obtained by Impregnation Technology
AUTHORS:
Ahmed A. Al-Ghamdi, Omar A. Al-Hartomy, Falleh R. Al-Solamy, Nikolay T. Dishovsky, Petrunka Malinova, Nikolay T. Atanasov, Gabriela L. Atanasova
KEYWORDS:
Composite Materials, Correlation, Electrical Conductivity, Shielding Effectiveness
JOURNAL NAME:
Materials Sciences and Applications,
Vol.7 No.9,
September
8,
2016
ABSTRACT: The paper presents the synthesis and characterization of carbon black/silicone dioxide hybrid fillers obtained by an impregnation technology. The electromagnetic interference shielding effectiveness of the composites filled with carbon black/silicone dioxide hybrid fillers was measured in wide frequency range of 1 - 12 GHz. The dc and ac electrical conductivity of composites also have been investigated. The relationship between electrical (dc and ac) conductivity and shielding effectiveness was analyzed. A positive correlation was found between the absorptive shielding effectiveness and ac conductivity for composites comprising conductive carbon black/silica filler, when the filler loading is above the percolation threshold.