Water and Heat Exposure Influence on Dielectric Response of LDPE-Al2O3 Nanocomposites

The influence of water and heat exposure on the dielectric response of LDPE-Al
₂
O
₃
nanocomposites with 2wt% filler content was analyzed in this paper. The dielectric spectra of the real and imaginary permittivities, over a frequency range of 10 mHz - 1 MHz and for temperatures from 30 to 70°C, measured before any exposure, after one week immersion in deionized water and after one week thermal aging at 90°C are presented and discussed in this paper, analyzing the stability of the dielectric properties to the applied stresses.