The effect of electrostriction on piezoelectric activity has been investigated in a ferroelectric copolymer of vinylidene fluoride and trifluoroethylene with a composition of 52/48 mol%. The electrostriction constants determined from changes in lattice spacing and the spontaneous polarization associated with a ferroelectric-to-paraelectric transition induce piezoelectric activities, positive d 31 and negative d 32 . The combined contributions from the dimensional effect and the electrostrictire coupling are consistent with the magnitude and anisotropy of observed piezoelectric constants.
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Furukawa et al. (1984) studied this question.
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