Title :
Microwave response properties of epoxy resin composites filled with graphitic fillers
Author :
Bellucci, Stefano ; Bistarelli, S. ; Cataldo, A. ; Micciulla, F. ; Macutkevic, J. ; Kranauskaite, I. ; Banys, J. ; Kuzhir, P. ; Volynets, N. ; Paddubskaya, A. ; Bychanok, D. ; Maksimenko, S. ; Fierro, V. ; Celzard, A.
Author_Institution :
Lab. Naz. di Frascati, INFN, Frascati, Italy
Abstract :
Composite materials based on epoxy resin filled with various kinds of graphite particles: exfoliated graphite (EG), natural graphite, and coarse, medium and fine artificial graphites have been prepared. The dielectric permittivity strongly increases with graphite particle size. This effect is related to the distance of the investigated filler concentrations to the composites´ percolation threshold. Microwave experiments show that exfoliated graphite is, out of investigated graphite particles, the only one being a really effective additive for producing electromagnetic (EM) interference (EMI) shielding: 2 wt.% epoxy/EG is absolutely opaque to electromagnetic radiation at 30 GHz.
Keywords :
electromagnetic shielding; filled polymers; graphite; microwave materials; permittivity; resins; C; artificial graphites; dielectric permittivity; electromagnetic interference shielding; electromagnetic radiation; epoxy resin composites; frequency 30 GHz; graphitic fillers; microwave response properties; natural graphite; Conductivity; Dielectrics; Epoxy resins; Frequency measurement; Graphite; Permittivity; Polymers; Composite materials; dielectric permittivity; exfoliated graphite; microwaves; percolation threshold;
Conference_Titel :
Numerical Electromagnetic Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO), 2014 International Conference on
Conference_Location :
Pavia
DOI :
10.1109/NEMO.2014.6995701
