Electrical Properties of the PVDF-Lead-Free Ceramic-Based Composite Film for Sensor Applications

Abstract

The ceramic-polymer composites were prepared by mixing 0.7Bi(Fe0.98Ga0.02)O3-0.3BaTiO3 (BFBTO) and poly(vinylidene fluoride) (PVDF), taken at various weight ratios 5, 10, and 15% processed by solvent-casting technique. The X-ray diffraction (XRD) spectra depict combined phases (α−, β− and γ−) of the PVDF and tetragonal phase of BFBTO. The surface morphology was examined by scanning electron micrograph showing the spread of lead-free BFBTO filler on matrix PVDF. The rise in filler content, in the PVDF matrix, enhances dielectric constant and remnant polarization. The Nyquist plot suggests the contribution of grain and grain boundary effect. The composite films shall be useful for various self-power sensors. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.