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Issue 5, 2015
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Potassium–sodium niobate lead-free ceramics: modified strain as well as piezoelectricity

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Abstract

The obvious conflicts between large piezoelectricity and high strain could be solved by developing new phase boundaries in potassium–sodium niobate materials. Here, we have solved this problem by extensive experimental researches and induced a larger strain as well as a higher piezoelectricity in (K, Na)NbO3. Large converse piezoelectric coefficient (d*33 = 599–1553 pm V−1) and high strain (0.18–0.46%) were achieved, which are the highest values reported to date in potassium–sodium niobate, suggesting that such a system is a promising lead-free candidate for electromechanical actuator applications. In addition, high d33 values of 400–490 pC N−1 have also been attained in the ceramic due to its rhombohedral–tetragonal phase boundary, as well as its composition.

Graphical abstract: Potassium–sodium niobate lead-free ceramics: modified strain as well as piezoelectricity

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Publication details

The article was received on 10 Oct 2014, accepted on 01 Dec 2014 and first published on 19 Dec 2014


Article type: Communication
DOI: 10.1039/C4TA05423G
Citation: J. Mater. Chem. A, 2015,3, 1868-1874

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    Potassium–sodium niobate lead-free ceramics: modified strain as well as piezoelectricity

    T. Zheng, J. Wu, D. Xiao, J. Zhu, X. Wang and X. Lou, J. Mater. Chem. A, 2015, 3, 1868
    DOI: 10.1039/C4TA05423G

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