0-3 Connectivity of PVDF/BST piezoelectric composites

Abstract

Film mechanical sensors, one of the piezoelectric applications, which are focused on this research, are used to measure or detect various measure or detect various mechanical quantities. This work extended the range of material properties by fabricating PVDF/Ba0.7Sr0.3TiO3 composite film. The Ba0.7Sr0.3TiO3 as piezoelectric ceramic is induced in composite to inerease the dielectric constant and piezoelectric properties. A certain weight fraction of 0.3, 0.5 and 0.7 of barium strontium titanate (Ba0.7Sr0.3TiO3) power at different calcine temperature was embedded in a matrix of poly vinylidene fluoride (PVDF) before compression molding into 100-200 um thick sheets. The crystal phase of PVDF, Ba0.7Sr0.3TiO3 and composite is investigated. Subsequently, thermal properties at differential %wt of the ceramic were studied. The microstructure of the composite was observed using scanning electron microscopy (SEM). The dcielectric constant and the loss tangent of composites at different %wt and different calcining temperature of ceramic were also investigated.