Author(s)

Ahmed A. Al-Ghamdi¹, Omar A. Al-Hartomy¹, Falleh R. Al-Solamy², Nikolay T. Dishovsky³, Petrunka Malinova³, Nikolay T. Atanasov^4,5, Gabriela L. Atanasova^4,5

¹Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, KSA.
²Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, KSA.
³Department of Polymer Engineering, University of Chemical Technology and Metallurgy, Sofia, Bulgaria.
⁴Department of Telecommunications, Faculty of Telecommunications and Management, University of Telecommunications and Post, Sofia, Bulgaria.
⁵Department of Communication and Computer Engineering, Faculty of Engineering, South-West University ‘Neofit Rilski’, Blagoevgrad, Bulgaria.

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.

Composite Materials, Correlation, Electrical Conductivity, Shielding Effectiveness

Al-Ghamdi, A. , Al-Hartomy, O. , Al-Solamy, F. , Dishovsky, N. , Malinova, P. , Atanasov, N. and Atanasova, G. (2016) Correlation between Electrical Conductivity and Microwave Shielding Effectiveness of Natural Rubber Based Composites, Containing Different Hybrid Fillers Obtained by Impregnation Technology. Materials Sciences and Applications, 7, 496-509. doi: 10.4236/msa.2016.79043.