Hydrostatic Piezoelectric Coefficients of the 2–2 Composite Based on [011]-poled 0.71Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 Single Crystal

The effect of the polarisation orientation of [011]-poled polydomain PMN-0.29PT single crystal on the hydrostatic piezoelectric coefficients and of a parallel-connected 2–2 composite has been analysed. Orientation and volume-fraction dependences of the piezoelectric coefficients of the 2–2 PMN-0.29PT/polymer composite have been studied to determine extreme points of and in three cases of rotations of the main crystallographic axes of the PMN-0.29PT single crystal. The largest values of the hydrostatic piezoelectric coefficients = 444 pC/N and = 33.1 C/m2 are of interest for hydroacoustic applications. Important contributions from the piezoelectric coefficients and into and , respectively, have been determined near the extreme points of the hydrostatic parameters.

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