Regular Article

Dielectric behavior of a sintered heterogeneous ternary composite resin/BT/Cu₂O

¹ Laboratoire Instrumentation Scientifique LIS, Département d'Electronique, Faculté de Technologie, Université Ferhat Abbas Sétif 1, 19000 Sétif, Algeria
² Département d'électronique, Faculté Science et Technologie ST Université de M'Sila, 28000 M’Sila, Algeria
³ Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain

^* e-mail: bouzitnacerdine@yahoo.fr

Received: 29 July 2017
Received in final form: 7 October 2017
Accepted: 10 October 2017
Published online: 31 October 2017

Abstract

In this paper, we investigate and model the dielectric behavior of a ternary composite prepared at room temperature with a mixture of epoxy resin (RE), barium titanate (BT) and copper oxide (Cu₂O), sintered at three different temperatures (150 °C, 200 °C, and 250 °C). Time domain spectroscopy (TDS) is used to characterize samples in the range [DC to 2 GHz] by performing a particular study at low frequency (500 MHz). The latter focused on both the sintering and the Cu₂O addition effects on a ternary composite dielectric behavior. These effects were quantified as a function of the BT volume fraction. For this purpose, we used an optimization method based on nonlinear regressions to determine the permittivity, to minimize systematic errors of this dielectric parameter, and to show the effect of Cu₂O on it. Moreover, we attempt to explain the sintering temperature effect on this kind of mixtures through the modified Lichtenecker model. As a matter of fact, the importance of this law is allocated on one hand to the validation and concordance of the experimental results with those of the theory and on the other hand to the temperature effect investigation on the form factor given by the modified Lichtenecker law.