Abstract

RAMAJO, Leandro Alfredo et al. Dielectric behaviour of CaCu₃Ti₄O₁₂-epoxy composites. Mat. Res. [online]. 2008, vol.11, n.1, pp. 85-88. ISSN 1516-1439.  http://dx.doi.org/10.1590/S1516-14392008000100016.

The dielectric behavior of composite materials (epoxy resin - barium titanate and epoxy - CCTO) was analysed as a function of ceramic amount. Composites were prepared by mixing the components and pouring them into suitable moulds. In some compositions, the matrix was reduced by tetrahydrofuran (THF) incorporation. Samples containing various amounts of ceramic filler were examined by TG/DTA and scanning electron microscopy analysis. Dielectric measurements were performed from 20 Hz to 1 MHz and 30 to 120 °C. It was demonstrated that the epoxy - CCTO composites possessed higher permittivity than classic epoxy - BaTiO₃ composites. However, the low resin permittivity prevailed in the composite dielectric performance.

Keywords : polymer-matrix composites (PMCs); electrical properties; composites.