Today’s title is somewhat misleading as there really aren’t any butterflies involved but as soon as I saw these bipolar strain curves in a Fast Track Communication (FTC) recently published in JPhysD, butterflies sprang to mind. I’m not the only one, surely?
Jigong Hao et al show that (Bi0.5Na0.5)TiO3-based lead-free piezoelectric ceramics have a surprisingly high field-induced nonlinear strain of 0.57% comparable with Pb-based antiferroelectrics. This property, along with exceptionally good fatigue resistance and high temperature stability, makes the material studied attractive for applications in ultra-large stroke and nonlinear actuators.
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Front Image (adapted) and article image: Hysteresis loops and strain curves of (Bi0.5Na0.5)TiO3-based lead-free piezoelectric ceramics by Jigong Hao et al 2015 J. Phys. D: Appl. Phys. 48 472001. Copyright IOP Publishing 2015.
Categories: Journal of Physics D: Applied Physics