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We report a giant strain (0.72%) with a low degree of hysteresis (ca. 36.2%) and a giant Smax/Emax ratio (916 pm V−1, Smax and Emax denote the maximum strain and the corresponding electric field, respectively) for lead-free (1−x)(0.8Bi0.5Na0.5TiO3-0.2Bi0.5K0.5TiO3)-xSr0.8Bi0.1□0.1Ti0.8Zr0.2O2.95 piezoceramics with x = 0.06. The giant strain originates from a reversible transition between the ergodic...
The strain and polarization hystereses of lead-free 0.94Bi 1/2 Na 1/2 TiO 3 –0.06BaTiO 3 during unipolar electric field loading are obtained from room temperature to 150°C under uniaxial compressive stress up to 446MPa. At intermediate temperatures a stress-dependent peak evolves in both the maximum strain and polarization. At 125°C a large strain with a large-signal...
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