Abstract
Volume fraction and orientation dependences of piezoelectric coefficients and hydrostatic piezoelectric response of 2-2 parallel-connected composites with two piezoactive components are analyzed. These composites comprise relaxor-ferroelectric (1−x)Pb(A1/3Nb2/3)O3−xPbTiO3 single crystals (A=Mg or Zn) and polyvinylidene fluoride, and different variants of poling directions of these layers are considered. It is shown how the orientation of the main crystallographic axes and the anisotropy of the electromechanical properties of the single crystal influence maxima of effective piezoelectric coefficients and other parameters of the composites. Advantages of the piezocomposites based on the [011] poled single crystals are discussed.
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