Polymer composites have significant importance in energy storage applications. In the present work, polymer composites of polyvinyl pyrrolidone (PVP) and lanthanum oxide (La2O3) have been synthesized with filler (La2O3) concentrations varying from 1 mwt% to 5 mwt% using high-energy planetary ball milling. The prepared polymer composite powder is compressed into pellets using a hydraulic press for dielectric measurements. Bonding, structural, morphological, and dielectric characteristics of these composites have been investigated using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and impedance spectroscopy. The dielectric constant and dielectric loss of LO/PVP composites for varying filler concentrations have been investigated using an impedance analyzer across a broad range of frequencies at room temperature. Results show that the dielectric characteristics of PVP enhance with increasing La2O3 filler concentration due to interfacial polarization. The dielectric constant of pristine PVP is observed to be 4.73, and with 5 mwt% La2O3 filler concentration, it increased to 28.38 at 1 kHz, making these composites appropriate for energy storage and advanced electronic applications.
Yadav et al. (Mon,) studied this question.