INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Dielectric Permittivity Estimation of Barium Titanate (BT) Electrospun Fibers and their Epoxy Composites
Autor/es:
H.A. ÁVILA; M.S. CASTRO; R. PARRA; M.M. REBOREDO
Lugar:
Buenos Aires
Reunión:
Conferencia; COMAT 2015, 6th International Conference on Science and Technology of Composite Materials; 2015
Resumen:
Ceramic-polymer composites using BaTiO3 fibers and epoxy resin were prepared. The barium titanate (BT) fibers were obtained by employing sol-gel/electrospinning process and heat-treated at 800 °C. Ceramic fiber layers were immersed in the polymer and then, the composites were cured in an oven at 100 °C for 2 h. The composites were cut into rectangular specimens to obtain fiber layers configurations with respect to electrodes, parallel and perpendicular. The dielectric constant of BT fibers was calculated empirically using the rule of mixtures, assuming that layers of fibers act as a ceramic-air composite. The values of relative and imaginary composite permittivity were significantly influenced by the electrode configuration with respect to the fiber layers. The results of the relative permittivity of the epoxy/BT fibers composite, in both configurations, presented a concordance with the theoretical model of rule of mixtures used to predict the permittivity limits in ceramic-polymer composites.