About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
|
Presentation Title |
E-18: Carbon Fibers Based Ultra-porous Epoxy Composites for Planar Multilayer Absorber Application |
Author(s) |
Hanadi Breiss, Aicha El Assal, Ratiba Benzerga, Ala Sharaiha, Ali Harmouch, Akil Jrad |
On-Site Speaker (Planned) |
Ratiba Benzerga |
Abstract Scope |
Today, porous composites are largely used to achieve microwave broadband absorbers. Here, a simple method was proposed to fabricate lightweight CFs/epoxy foam composites with high absorbing performance. Samples with different densities and CFs loads are elaborated and characterized in order to investigate the influence of these parameters on the structure and on the dielectric properties of composites. This shows that the material density can be reduced by one-third compared to the “standard” epoxy foam and the permittivity is reduced, due to the presence of more porosity, while maintaining a very high level of dielectric losses, which is very promising for the elaboration of EM absorbing materials. Finally, properties that ensure an impedance gradient are selected to make a multilayer prototype. The simulation and measurement of a very lightly loaded absorber were compared, in a 2-16 GHz frequency band, to those of the dense CFs/epoxy foam multilayer and commercial multilayer absorber. |