Effect of DC Poling Field on Domain Behavior in Lead-Free Piezoelectric Ceramics

Toshio Ogawa; Masahito Furukawa; Takeo Tsukada

doi:10.4028/www.scientific.net/AST.67.34

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 67Effect of DC Poling Field on Domain Behavior in...

Effect of DC Poling Field on Domain Behavior in Lead-Free Piezoelectric Ceramics

Abstract:

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.