170988 20260430151736.0 doi 10.18280/acsm.500101 sideral 149052 ART-2026-149052 eng Kouzrit, Daoud Oxide effect on the dielectric behavior of a ternary titanate-based composite: exploration on broadband dielectric permittivity 2026 This article examines the dispersion phenomenon and the influence of silicon dioxide (SiO2) on the complex permittivity of binary composites made of epoxy resin (RE) and barium titanate (BaTiO₃). Using Time-Domain Spectroscopy (TDS), the samples were characterized over a frequency range from DC to 30 GHz. The volume fractiondependent relative permittivity of these composites was modeled using the modified Lichtenecker mixing law (MLL). Numerical optimization was employed to refine the model parameters, offering predictive insights into dielectric permittivity and shape factor coefficients for ternary composites. Comparative analysis confirms the model's suitability for binary and ternary composites, with an efficiency estimated at an average error of less than 2%. A Lorentzian resonance model is proposed to characterize the frequency-dependent behavior of the complex permittivity. The frequency dispersion profile of this ternary composite permittivity, exhibiting both relaxation and resonance spectra, shows a clear evolution with increasing BaTiO₃ content. Our empirical model provides a robust description of the resonance-type complex permittivity for BaTiO₃ and silica composites. The inclusion of SiO2 in the binary composite produced remarkable effects on the composite permittivity and loss tangent (tan δ) values, as these dropped drastically by 60%. These materials are promising for the miniaturization of electronic components in microelectronics and telecommunications applications. Access copy available to the general public Unrestricted info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Khouni, Habib Bourouba, Nacerdine Bouzit, Nacerdine Brahimi, Abdelhalim Martinez J., Juan Pablo Universidad de Zaragoza (orcid)0000-0001-9221-9306 2002 247 Universidad de Zaragoza Dpto. Física Aplicada Área Electromagnetismo 50, 1 (2026), 1-11 Ann. chim. ANNALES DE CHIMIE-SCIENCE DES MATERIAUX 0151-9107 1438057 http://zaguan.unizar.es/record/170988/files/texto_completo.pdf Versión publicada 3000632 http://zaguan.unizar.es/record/170988/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:170988 articulos driver 2026-04-30-13:58:31 ARTICLE