Prediction of the electrical permittivity of Kaolin at microwave from the binary composite (Resin-Epoxy, Kaolin)

This paper work presents a koalin dielectric properties study at microwave frequencies of geo-polymers based on Tamazert and meta-kaolin clays. By using temporal spectroscopy and PCMTDR to convert temporal data into frequencies, we will be able to follow the evolution of the dielectric behaviour of this type of material and to deduce its predictive model over a broad frequency spectrum ranging from DC at 2 GHz. In addition, the insertion of Kaolin, which is largely abandoned in nature and less known in telecommunications and microelectronics, will allow us to explore new areas of application. This work therefore focuses on the determination of the dielectric permittivity of a binary composite material Epoxy Resin with Kaolin (RE-KL) under several volume fractions ranging from pure resin (100% RE) up to a composition of 65% resin and 35% Kaolin. For better experimental measurement precision according to a suitable on-line measurement method, a short circuit measurement is carried out in the absence of the sample for the elimination of systematic errors affecting the evaluation of the complex effective permittivity of the mixture. errors arising from sample manufacturing, the latter are reduced by averaging the experimental results. These results subsequently allowed the establishment of the modified Lichtnecker model with appreciable precision and validated by comparison with other existing models. This result advantageously allowed the evaluation of the permissiveness of the new constituent, in this case Kaolin.