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A piezoelectric pseudo-bimorph actuator

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5 Author(s)
Shi, Huaduo ; Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China ; Chen, Jianguo ; Liu, Guoxi ; Xiao, Wenlei
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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.

Published in:

Applied Physics Letters  (Volume:102 ,  Issue: 24 )