High frequency permittivity determinations for the (PMN–PT)/BaTiO3 polymer–ceramic nanocomposites

Polymer-ceramic nanocomposites with ceramic filler ((PMN-PT)/BaTiO₃) and having an increased electric permittivity were studied in this paper from the point of view of their electric permittivity evolution with different parameters like: frequency; metal nature in the metal acac included in the epoxy base polymer; metal acac concentration in the epoxy matrix; percentage of the (PMN-PT), respectively BaTiO₃ content in the filler combination; percentage of the ceramic filler content. New results were obtained by simulational study, using a strategy developed in our previous work, for a frequency domain in the microwave range (1 - 18 GHz), above the superior frequency limit for the experiments (100 MHz). The electric resonances of the material samples were determined, depending on the internal mechanisms of polarization. Permittivity dependence on the ceramic filler content is non-linear in the vicinity of the point where the ceramic content is optimum, corresponding to a maximum value of the permittivity for the nanocomposites.