Origin of thermal depolarization in piezoelectric ceramics

The temperature dependences of dielectric loss (right Y) and dielectric constant (left Y) of the PZTMN (a), BSPTPNW (b), PTBFM (c), BWLi (d), BWLa (e) ceramics. The peak points of dielectric loss curves below or at the Curie temperature are the points of complete depolarization.177