Abstract
This study presents the piezoelectric and dielectric properties of multilayer actuator, being designed to stack ceramic and electrode layers alternatively, under a consideration of structure geometry, the thickness ratio of the ceramic layer to electrode layer. Increases in polarization and electric field-displacement with increasing thickness ratio of the ceramic/electrode layer were attributed to the change of non-180°/180° domain, ratio of which was affected by the internal stress. The piezoelectricity and actuation behaviors were found to be affected by the volume ratio (or thickness ratio) of ceramic layer relative to ceramic layer as well as the magnitude of external electric field.
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