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

Yao FZ, Wang K, Jo W, Webber KG, Comyn TP, Ding JX, Xu B, Cheng LQ, Zheng MP, Hou YD, Li JF (2016)

Publication Status: Published

Publication Type: Journal article

Publication year: 2016

Journal

Advanced Functional Materials Wiley-VCH Verlag

Publisher: Wiley-VCH Verlag

Book Volume: 26

Pages Range: 1217-1224

Journal Issue: 8

DOI: 10.1002/adfm.201504256

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.

Authors with CRIS profile

Kyle Grant Webber Professur für Werkstoffwissenschaften (Funktionskeramik)

Involved external institutions

Tsinghua University CN China (CN) Beijing University of Technology / 北京工业大学 CN China (CN) University of Leeds GB United Kingdom (GB) Ulsan National Institute of Science and Technology (UNIST) / 울산과학기술원 KR Korea, Republic of (KR)

How to cite

APA:

Yao, F.-Z., Wang, K., Jo, W., Webber, K.G., 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://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.

BibTeX: Download