Abstract
Piezoelectric properties of the 0–3 connectivity composites comprising spheroidal inclusions of modified PbTiO3 ceramics dispersed in a polymer matrix have been studied. Monotonic and nonmonotonic concentration dependences of the effective piezoelectric coefficients e 3j *, d 3j *, h 3j *, and (j=1, 3) of the composites with elongated ferroelectric ceramic (FC) inclusions are analyzed. The observed nontrivial piezoelectric response of the 0–3 composites of the modified PbTiO3 ceramics-polymer type is determined to a considerable extent by properties of the polymer matrix and by the sign of the e 3j (FC) coefficients (e 3j (FC) >0).
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