Smart Mater. Struct. volume 23, issue 5, P055006 2014 DOI: 10.1088/0964-1726/23/5/055006 View full text
Matthias C Wapler, Moritz Stürmer, Jens Brunne, Ulrike Wallrabe

Abstract: We present a method to produce in-plane polarized piezo films with a freely adjustable ratio of the strains in orthogonal in-plane directions. They can be used in piezo bending actuators with a tunable curvature profile. The strains are obtained as mean strains from a periodic polarization pattern produced by a suitable doubly interdigitated electrode structure. This mechanism is demonstrated for several examples using PZT sheets. We further discuss how this tuning and the parameters of the electrode layout a…

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