Perovskite-Based Mesostructures and Related Composites — Influence Exerted by Morphology and Interface

Abstract

The present work seeks to report about the properties of lead-free NaNbO 3 particles with different morphology (cubic-like and fiber-like particles) and their application in composites with poly(vinylidenefluoride) (PVDF) polymer. The composites are obtained using a range of varying volume fractions of NaNbO 3 particles (30%, 40%, 50% and 60%). The best conditions for obtaining the NaNbO 3 particles as well as the composites have been thoroughly studied. It was observed that the highest volume fraction of NaNbO 3 particles undermined the flexibility of the composites. The tran‐ sition percolation phenomenon, commonly known as percolation threshold, was calculated as a function of the dielectric constant and conductivity of the composite. The composites exhibit piezoelectric and ferroelectric properties and both are found to improve by anisotropy of the NaNbO3 particles.