Articles techniques et présentations

The dielectric properties of ferroelectric PVDF polymer embedded core-shell (Al-Al2o3) nanoparticle is simulated using COMSOL Multiphysics® software. Significant increase in electrical permittivity of the composite at percolation threshold (K = 2800) is achieved when compared to electrical permittivity of bare polymer (K = 12). Both Maxwell Garnett and Symmetric Bruggeman models gave an electrical permittivity around 26.2, which is in good agreement with the experimental values we obtained in a similar composite at the same loading. The simulation results indicate a drop in net polarization by a factor of 3 at the contact region which is expected with the use of a capping shell for electrical insulation of metal cores.