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Microstructural origin for the piezoelectricity evolution in (K0.5Na0.5)NbO3-based lead-free ceramics
Australian Institute for Innovative Materials - Papers
  • Hanzheng Guo, Iowa State University
  • Shujun Zhang, The Pennsylvania State University
  • Scott P Beckman, Iowa State University
  • Xiaoli Tan, Iowa State University
RIS ID
106523
Publication Date
1-1-2013
Publication Details

Guo, H., Zhang, S., Beckman, S. P. & Tan, X. (2013). Microstructural origin for the piezoelectricity evolution in (K0.5Na0.5)NbO3-based lead-free ceramics. Journal of Applied Physics, 114 (15), 154102-1-154102-8.

Abstract

Chemically modified (K0.5Na0.5)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(K0.5Na0.5)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 excellent piezoelectric 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. 2013 AIP Publishing LLC.

Citation Information
Hanzheng Guo, Shujun Zhang, Scott P Beckman and Xiaoli Tan. "Microstructural origin for the piezoelectricity evolution in (K0.5Na0.5)NbO3-based lead-free ceramics" (2013)
Available at: http://works.bepress.com/xiaoli_tan/71/