2013•Applied Physics LettersRequires access
A piezoelectric pseudo-bimorph actuator
Huaduo Shi, Jianguo Chen, Guoxi Liu, Wenlei Xiao, Shuxiang Dong
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Abstract
We report a piezoelectric pseudo-bimorph actuator, which is made of only one single plate with interdigitated electrodes on both sides and polarized alternately in longitudinal direction. Like a bimorph actuator, it can also produce a large bending actuation based on anti-symmetrically longitudinal piezoelectric d33 strain effect under an applied electric field. The presented pseudo-bimorph actuator shows much better temperature stability than conventional piezoelectric bimorph actuators from room temperature to the depolarization temperature of the material due to lacking of interface strain loss.