Artículos de revistas
Computational approach of dielectric permittivities in BaTiO3-epoxy composites
Fecha
2008-09Registro en:
Ramajo, Leandro Alfredo; Reboredo, Maria Marta; Santiago, Diego Hernan; Castro, Miriam Susana; Ramajo, Damian Enrique; Computational approach of dielectric permittivities in BaTiO3-epoxy composites; Sage Publications Ltd; Journal of Composite Materials; 42; 19; 9-2008; 2027-2037
0021-9983
CONICET Digital
CONICET
Autor
Ramajo, Leandro Alfredo
Reboredo, Maria Marta
Santiago, Diego Hernan
Castro, Miriam Susana
Ramajo, Damian Enrique
Resumen
A numerical approach using a finite element method (FEM) was performed in order to determine the dielectric constant ("0) of BaTiO3–epoxy composites. In order to diminish computational resources and analyse simple models, composite topology was represented by periodic structures based on FCC configurations, but introducing novel packaging protocols, defining the way composites are filled as particle concentration is increased. The dielectric response of these anisotropic and periodic structures was mathematically represented through a quasi-static approximation using the Laplace equation. The amount of inclusions was varied in order to represent diluted and concentrated systems and structures were assessed for the whole feasible range of volume fractions. The numerical results were compared with experimental data concluding that only packaging protocols that consider higher particle–particle interaction are suitable to represent the dielectric behavior of concentrated-composite materials.