Effect of DC Poling Field on Domain Behavior in Lead-Free Piezoelectric Ceramics
Poling characteristics, especially DC poling field (E) dependence of dielectric and piezoelectric properties were investigated to evaluate the domain behavior in lead-free ceramics such as alkali niobate and alkali bismuth titanate ceramics. The domain switching was confirmed by the E to realize minimum dielectric constant (εr), minimum electromechanical coupling factor (k) and maximum frequency constant (fc), because of domain clamping. On the other hand, the domain rotation occurred at the E to obtain maximum εr and minimum fc. These phenomena are observed in the lead-free ceramics as well as PZT ceramics.
Pietro VINCENZINI, Vojislav V. MITIC, Alois LOIDL and Dino FIORANI
T. Ogawa et al., "Effect of DC Poling Field on Domain Behavior in Lead-Free Piezoelectric Ceramics", Advances in Science and Technology, Vol. 67, pp. 34-41, 2010