Dielectric Properties of PVA/MgO Polymer Nanocomposite Films

Abstract The polymer nanocomposites (PNC) films using MgO and PVA were prepared by solution casting method. XRD, FTIR, and EDX investigations performed in combination gave detailed insights into the structural, chemical and elemental properties of the MgO-PVA composite along with the purity of the sample. The SEM images provide evidence for an even distribution of MgO nanoparticles in the prepared sample. The influence of MgO nanoparticle concentration on the ac conductivity and dielectric properties of nanocomposite films has been investigated. The values of both the real part (εʹ) and the imaginary part (εʹʹ) of the dielectric constant and ac-conductivity of PVA film have been observed to increase with increasing MgO concentration. At higher frequencies, the prepared PNC films exhibit a low dielectric value and behave as a lossless material. Thus, the findings of this study offer valuable insights that can be utilized for designing and assessing the performance of materials and devices across diverse fields, ultimately leading to advancements in electrical engineering and related disciplines.