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Microstructure and piezoelectric properties of lead-free 0.95(Na0.5K0.5)NbO3–0.05(Bi0.5K0.5)Zr1−x Ti x O3 ceramics

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Abstract

0.95(Na0.5K0.5)NbO3–0.05(Bi0.5K0.5)Zr1−x Ti x O3 (abbreviated as KNN–BKZT x ) ceramics were prepared by the conventional solid state method, and the effect of the Ti content on the surface morphology, crystalline structure, and electrical properties of KNN–BKZT x ceramics were mainly investigated. With the increase of Ti content, the temperature of the orthorhombic–tetragonal (O–T) phases transitions shifted to lower temperatures, and the O–T phase boundary of KNN–BKZT x ceramics was identified in the composition with 0 ≤ x ≤ 0.3 at room temperature. It was considered that the piezoelectric properties of the ceramics were enhanced significantly owing to the more possible polarization states resulting from the coexistence of two phases. The ceramic with x = 0.2 exhibited optimum properties: d 33 = 260 pC/N, k p = 0.38, and T C = 323 °C.

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Acknowledgments

This work was supported by National Science Foundation of China (NSFC Nos. 50772068, 50972095, 51272164, and 51332003) and Foundation of Doctor Training Program in University and College in China (Nos. 20030610035, and 20080610020). Thanks are also to Ms. Wang Hui for her help in the SEM measurement.

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Authors and Affiliations

  1. Department of Materials Science, Sichuan University, Chengdu, 610064, People’s Republic of China

    Min Xiao, Dingquan Xiao, Zhuo Wang, Tao Huang, Jiagang Wu, Fangxu Li, Bo Wu & Jianguo Zhu

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  1. Min Xiao
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  2. Dingquan Xiao
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  3. Zhuo Wang
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  4. Tao Huang
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  5. Jiagang Wu
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  7. Bo Wu
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  8. Jianguo Zhu
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Correspondence to Dingquan Xiao.

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Xiao, M., Xiao, D., Wang, Z. et al. Microstructure and piezoelectric properties of lead-free 0.95(Na0.5K0.5)NbO3–0.05(Bi0.5K0.5)Zr1−x Ti x O3 ceramics. J Mater Sci: Mater Electron 25, 1938–1941 (2014). https://doi.org/10.1007/s10854-014-1824-3

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  • DOI: https://doi.org/10.1007/s10854-014-1824-3

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