Yao, F-Z, Wang, K, Jo, W et al. (8 more authors) (2016) Diffused Phase Transition Boosts Thermal Stability of High-Performance Lead-Free Piezoelectrics. Advanced Functional Materials. ISSN 1616-301X
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. We find that good thermal stability can be achieved in CaZrO3-modified KNN lead-free piezoceramics, in which the normalized strain d33* almost keeps constant from room temperature up to 140 oC. 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 polymorphic phase transition (EED-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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Yao, F.-Z., Wang, K., Jo, W., Webber, K. G., Comyn, T. P., Ding, J.-X., Xu, B., Cheng, L.-Q., Zheng, M.-P., Hou, Y.-D. and Li, J.-F. (2016), Diffused Phase Transition Boosts Thermal Stability of High-Performance Lead-Free Piezoelectrics. Adv. Funct. Mater.. doi: 10.1002/adfm.201504256, which has been published in final form at http://dx.doi.org/10.1002/adfm.201504256. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
Keywords: | lead-free, piezoelectric, niobate, phase transition, temperature stability |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Materials Research (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 Jan 2016 16:44 |
Last Modified: | 11 Apr 2017 02:58 |
Published Version: | http://dx.doi.org/10.1002/adfm.201504256 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/adfm.201504256 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:93900 |