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    Understanding the piezoelectricity of high-performance potassium sodium niobate ceramics from diffused multi-phase coexistence and domain feature

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    Journal of materials chemestry A-2019-Xiang Lv.pdf
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    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Sun, Xi-xi
    Zhang, Junwei
    Lv, Xiang
    Zhang, Xixiang cc
    Liu, Yao
    Li, Fei
    Wu, Jiagang
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2019
    Embargo End Date
    2020-07-21
    Permanent link to this record
    http://hdl.handle.net/10754/656130
    
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    Abstract
    The understanding of high piezoelectricity in potassium sodium niobate (KNN)-based ceramics with a new phase boundary has been limited to unpoled samples. Here, the phase structure, domain structure, and phenomenological theory were studied on both unpoled and poled samples by taking (0.99 − x)(K0.48Na0.52)(Nb0.955Sb0.045)O3–0.01SrZrO3–x(Bi0.5Ag0.5)ZrO3 ceramics as an example. Shifting the phase transition temperatures to room temperature can result in the coexistence of a ferroelectric matrix containing an orthorhombic–tetragonal (O–T) coexisting phase and rhombohedral (R)-related polar nanoregions (PNRs), and then the miniature and nanoscale domain structure can be demonstrated. During the poling process, the R phase-related PNRs can facilitate domain switching and polarization rotation, resulting in a single domain structure and enhanced evidence of the R phase. Therefore, high piezoelectricity originates from a single domain feature as well as the diffused multi-phase coexistence in association with R phase related PNRs. This study provides a systematic approach to understand the physical mechanisms of enhanced piezoelectricity in KNN-based ceramics.
    Citation
    Sun, X., Zhang, J., Lv, X., Zhang, X., Liu, Y., Li, F., & Wu, J. (2019). Understanding the piezoelectricity of high-performance potassium sodium niobate ceramics from diffused multi-phase coexistence and domain feature. Journal of Materials Chemistry A, 7(28), 16803–16811. doi:10.1039/c9ta03799c
    Sponsors
    The authors acknowledge financial support from the National Natural Science Foundation of China (NSFC No. 517222008), the Key Technologies Research and Development Program of Sichuan Province (No. 2018JY0007), and the Undergraduate Student's Research and Innovation Fund of Sichuan University (No. 201810610075).
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Journal of Materials Chemistry A
    DOI
    10.1039/c9ta03799c
    Additional Links
    http://xlink.rsc.org/?DOI=C9TA03799C
    ae974a485f413a2113503eed53cd6c53
    10.1039/c9ta03799c
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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