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Journal of Materials Science

, Volume 44, Issue 22, pp 6162–6166 | Cite as

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

  • Jigong Hao
  • Zhijun XuEmail author
  • Ruiqing Chu
  • Yanjie Zhang
  • Qian Chen
  • Guorong Li
  • Qingrui Yin
Article

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.

Keywords

Bi2O3 Piezoelectric Property Piezoelectric Constant Measured Temperature Range Polyvinyl Butyral 

Notes

Acknowledgement

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

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Jigong Hao
    • 1
  • Zhijun Xu
    • 1
    • 3
    Email author
  • Ruiqing Chu
    • 1
    • 3
  • Yanjie Zhang
    • 1
  • Qian Chen
    • 1
  • Guorong Li
    • 2
  • Qingrui Yin
    • 2
  1. 1.College of Materials Science and EngineeringLiaocheng UniversityLiaochengPeople’s Republic of China
  2. 2.The State Key Lab of High Performance Ceramics and SuperfinemicrostructureShanghai Institute of Ceramics, Chinese Academy of ScienceShanghaiChina
  3. 3.Liaocheng University Renewable Energy and Environment Materials Research CenterLiaochengChina

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