Piezoelectric sensitivity of PbTiO3-based ceramic/polymer composites with 0–3 and 3–3 connectivity

This paper describes the modelling and comparison of piezoactive composites of 0–3 and 3–3 geometry. Algorithms for the evaluation of effective elastic, piezoelectric and dielectric constants are proposed which can be used for the prediction of piezoelectric sensitivity and optimisation of properties. The hydrostatic piezoelectric voltage coefficient gh, figure of merit d33·g33 and hydrostatic figure of merit dh·gh are calculated for PbTiO3 based piezocomposites in which the anisotropy factor d33 / d31 of the piezoelectric phase can be varied from small to infinitely large values. Maxima of these parameters are determined and factors influencing piezoelectric sensitivity of the composites are analysed.