Determination of the piezoelectric coefficients dij of PZT ceramics and composites by laser interferometry

We have measured the piezoelectric coefficients of PZT ceramics by resonance and laser interferometry methods. The surface displacement was measured by a single-beam Michelson interferometer. A stable double-beam interferometer was also used to suppress the effect of bending. The piezoelectric coefficients dij of the PZT ceramic and of the 0–3 ceramic–polymer composites were determined from the displacements. The results for PZT dij coefficients obtained by the both methods are in good agreement.