Microstructural origin for the piezoelectricity evolution in (K0.5Na0.5)NbO3-based lead-free ceramicsJournal of Applied Physics
AbstractChemically modified (K0.5 Na 0.5)NbO3 compositions with finely tuned polymorphic phase boundaries (PPBs) have shown excellent piezoelectric properties. The evolution of the domain morphology and crystal structure under applied electric fields of a model material, 0.948(K0.5Na 0.5)NbO3–0.052LiSbO3, was directly visualized using in situ transmission electron microscopy. The in situ observations correlate extremely well with measurements of the electromechanical response on bulk samples. It is found that the origin of the excellentpiezoelectric performance in this lead-free composition is due to a tilted monoclinic phase that emerges from the PPB when poling fields greater than 14 kV/cm are applied.
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Citation InformationHanzheng Guo, Shujun Zhang, Scott P. Beckman and Xiaoli Tan. "Microstructural origin for the piezoelectricity evolution in (K0.5Na0.5)NbO3-based lead-free ceramics" Journal of Applied Physics Vol. 114 (2013) p. 154102
Available at: http://works.bepress.com/xiaoli_tan/3/