Journal article


Diffused Phase Transition Boosts Thermal Stability of High-Performance Lead-Free Piezoelectrics


Publication Details
Author(s): Yao FZ, Wang K, Jo W, Webber K, Comyn TP, Ding JX, Xu B, Cheng LQ, Zheng MP, Hou YD, Li JF
Publisher: Wiley-VCH Verlag
Publication year: 2016
Volume: 26
Journal issue: 8
Pages range: 1217-1224
ISSN: 1616-301X
eISSN: 1616-3018

Abstract

High piezoelectricity of (K,Na)NbO3 (KNN) lead-free materials benefits from a polymorphic phase transition (PPT) around room temperature, but its temperature sensitivity has been a bottleneck impeding their applications. It is found that good thermal stability can be achieved in CaZrO3-modified KNN lead-free piezoceramics, in which the normalized strain d(33)* almost keeps constant from room temperature up to 140 degrees C. In situ synchrotron X-ray diffraction experiments combined with permitivity measurements disclose the occurrence of a new phase transformation under an electrical field, which extends the transition range between tetragonal and orthorhombic phases. It is revealed that such an electrically enhanced diffused PPT contributed to the boosted thermal stability of KNN-based lead-free piezoceramics with high piezoelectricity. The present approach based on phase engineering should also be effective in endowing other lead-free piezoelectrics with high piezoelectricity and good temperature stability.



How to cite
APA: Yao, F.-Z., Wang, K., Jo, W., Webber, K., Comyn, T.P., Ding, J.-X.,... Li, J.-F. (2016). Diffused Phase Transition Boosts Thermal Stability of High-Performance Lead-Free Piezoelectrics. Advanced Functional Materials, 26(8), 1217-1224. https://dx.doi.org/10.1002/adfm.201504256

MLA: Yao, Fang-Zhou, et al. "Diffused Phase Transition Boosts Thermal Stability of High-Performance Lead-Free Piezoelectrics." Advanced Functional Materials 26.8 (2016): 1217-1224.

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