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Enhanced temperature stability of modified (K0.5Na0.5)0.94Li0.06NbO3 lead-free piezoelectric ceramics

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Abstract

To improve both the temperature stability and the mechanical quality factor of (K0.5Na0.5)0.94Li0.06NbO3 (KNLN6) ceramics, dense (K4CuNb8O23, Bi2O3)-modified KNLN6 lead-free ceramics were prepared. Results showed that the (K4CuNb8O23, Bi2O3)-modified ceramics exhibited a flat, temperature-stable behavior over the range of 20–120 °C. K4CuNb8O23 (KCN) and Bi2O3-codoping changed the KNLN6 to “hard” ceramics with a significant improvement of mechanical quality factor, Qm, from 82 to 756. Meanwhile, the piezoelectric constant, d33, and the planar electromechanical coefficient, kp, still maintained relatively high levels (d33 ~118 pC/N, kp ~35.6%). These results indicate that the modified KNLN6 ceramics are promising lead-free piezoelectric candidates for practical applications.

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Acknowledgement

This work is financially supported by National Natural Science Foundation of China (No. 50602021).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, People’s Republic of China

    Jigong Hao, Zhijun Xu, Ruiqing Chu, Yanjie Zhang & Qian Chen

  2. The State Key Lab of High Performance Ceramics and Superfinemicrostructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, China

    Guorong Li & Qingrui Yin

  3. Liaocheng University Renewable Energy and Environment Materials Research Center, Liaocheng, China

    Zhijun Xu & Ruiqing Chu

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  1. Jigong Hao
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  2. Zhijun Xu
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  3. Ruiqing Chu
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  4. Yanjie Zhang
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  5. Qian Chen
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  6. Guorong Li
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  7. Qingrui Yin
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Correspondence to Zhijun Xu.

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Hao, J., Xu, Z., Chu, R. et al. Enhanced temperature stability of modified (K0.5Na0.5)0.94Li0.06NbO3 lead-free piezoelectric ceramics. J Mater Sci 44, 6162–6166 (2009). https://doi.org/10.1007/s10853-009-3852-6

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  • DOI: https://doi.org/10.1007/s10853-009-3852-6

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