Electric field induced acoustic emission in ferroelectric ceramics under high electric field drive

The electric-field induced acoustic emission (AE) has been investigated on the dependencies of electric-field induced strain, strain rate, polarization, and polarization reversal current on a piezoelectric lead zirconate titanate (PZT) and electrostrictive ceramic specimen under bipolar high electric field drive using a newly developed system. The non-destructive AEs are not generated at maximum strain rate and maximum current in both piezoelectric and electrostrictive ceramics. The larger AEs are generated rigorously at high strain level, and they depend only on strain level. These results suggest that the non-destructive AE, which is attributed to the internal elastic energies, arise from lattice distortions with high internal stress field in the material such as piezoelectric, domain movement and electrostrictive deformation at high strain state.