Guest Editorial: Introduction to the Special Issue on the 10th International Symposium on Bioinformatics Research and Applications (ISBRA 2014)


The electrostrain behavior through reversible domain switching in aged acceptor-doped ferroelectric ceramics has been widely investigated within the past decade. However, previous works were focused on unpoled ceramics, that may solely utilize half of domains to exchange nonequal crystalline axis to get strain underneath external electric field. During this paper, we proposed an effective method: (one) Initially, the acceptor-doped ceramics should be poled. (two) Then, the ceramics need to be aged for enough time. (three) Finally, the applied electrical field ought to be perpendicular to the poling direction. Our technique will utilize additional domains to exchange nonequal crystalline axis to contribute to electrostrain in comparison with unpoled ceramics reported within the literature. In line with our technique, the unipolar electrostrain of one.5 mol. percent Fe-doped (Pb,Ba,Sr)(Zr,Ti)O3 ceramics during this work may reach zero.thirty three%, which was 3.75 times larger than that of unpoled one at 3.0 kV mmͨtwo;one. Meanwhile, the normalized strain d33* might reach nearly 1100 pm Vͨtwo;1 that was one of the highest values reported in ferroelectric ceramics. Additionally, the ceramics displayed attention-grabbing double or slim P-E (polarization-electrical field) hysteresis loops at various electric fields. Our work provides a general method via reversible domain switching in aged acceptor-doped ferroelectric ceramics to get large electrostrain for top-displacement actuator applications.

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