Modelling and dielectric behavior of ternary composites of epoxy (BaTiO₃/CaTiO₃)

¹ Laboratoire d'Instrumentation Scientifique (LIS), Département d'Électronique, Faculté des Sciences de l'Ingénieur, Université Ferhat ABBAS, 19000-Sétif, Algeria
² Departamento de Física Aplicada, Grupo de Electromagnetismo, Facultad de Ciencias, Universidad de Zaragoza, 50009-Zaragoza, Spain

Corresponding author: bouzitnacerdine@yahoo.fr

Received: 26 July 2006
Revised: 15 January 2007
Accepted: 9 March 2007
Published online: 28 March 2007

Abstract

The aim of this article is to explore materials made of polymer-titanate composites for application towards the size reduction of high frequency electronic components. A study has therefore been done on the dielectric effect of composites made of an epoxy matrix loaded with a mixture of barium titanate and calcium titanate. The effects have been quantified according to volume fraction of load. Results obtained from time domain reflectometry have been compared to modelling predictions from the generalized Lichtenecker law. Low frequency analysis (in the range DC — 500 MHz) has also been performed throughout this work, and it has primarily concentrated on conductivity behaviour which may be attributed to the effects of a percolation process. The study has confirmed the validity of the ternary mixture law being applied in order to predict the electromagnetic behaviour of the composite material. This material family may therefore find use in microelectronic applications and in the miniaturization of circuit components (substrates, components, cavities, antennas, etc.).