Dielectric, Piezoelectric and Ferroelectric Properties of Flexible 0–3 Type PZT/PVDF Composites Doped with Graphene

A 0–3 type PZT/PVDF composite was fabricated from lead zirconate titanate (PZT) and polyvinylidene fluoride (PVDF) by tape casting. Different amounts of graphene (GR) (0–0.9 wt.%) were added to study the electrical properties of the PZT/PVDF composite. The dielectric, piezoelectric and ferroelectric properties of the composites were investigated when the grain size of the PZT powder and the mass fraction of graphene were varied. The dielectric constant and dielectric loss tangent increased with the graphene content. When 0.6 wt.% graphene was added, the PZT/PVDF/GR composite had a piezoelectric constant of 27.62 pC/N, which is 21.6% higher than that of the composite without graphene.