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Phase transition and piezoelectric properties of (1 − x)K0.5Na0.5NbO3–xLiSbO3 ceramics by hydrothermal powders

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Abstract

KNbO3, NaNbO3 and LiSbO3 powders were synthesized by a hydrothermal route have been used to prepare (1 − x)K0.5Na0.5NbO3–xLiSbO3 (KNN–LS; x = 0.00–0.08) ceramics. The effects of LiSbO3 doping on the structures of KNN–LS ceramics have been systematically investigated by X-ray diffraction (XRD) and Rietveld refined XRD patterns. A gradual phase transition from orthogonal to tetragonal with the increase of LiSbO3 content is demonstrated. Thereinto, the monoclinic phase is identified for the KNN–LS ceramic with the LiSbO3 content of x = 0.08. Meanwhile, the XRD pattern reveals that the intensity ratio of (200)/(002) crystal face of the ceramic with x = 0.08 was bigger than one, which is different from the tetragonal phase. The tetragonal phase is revealed in the KNN–LS ceramic in the vicinity of x = 0.07, accompanying with relatively higher piezoelectric and ferroelectric properties. Tetragonal phase is beneficial to improve the piezoelectric properties of the KNN–LS ceramics.

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Acknowledgments

This work is supported by the Project of the National Natural Science Foundation of China (Grant No. 51372145); Research and Special Projects of the Education Department of Shaanxi Province (Grant No. 12JK0445); the Graduate Innovation Fund of Shaanxi University of Science and Technology (SUST-A04).

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  1. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an, 710021, China

    Wenlong Liu, Guoqiang Tan, Peng Xiong, Xu Xue, Hangfei Hao & Huijun Ren

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  1. Wenlong Liu
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  2. Guoqiang Tan
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Correspondence to Guoqiang Tan.

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Liu, W., Tan, G., Xiong, P. et al. Phase transition and piezoelectric properties of (1 − x)K0.5Na0.5NbO3–xLiSbO3 ceramics by hydrothermal powders. J Mater Sci: Mater Electron 25, 2348–2354 (2014). https://doi.org/10.1007/s10854-014-1886-2

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  • DOI: https://doi.org/10.1007/s10854-014-1886-2

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