Advertisement

Journal of Materials Science

, Volume 46, Issue 15, pp 5111–5116 | Cite as

Phase structure and electrical properties of (Li,Ta)-doped (K,Na)NbO3 lead-free piezoceramics in the vicinity of Na/K = 50/50

  • Jia-Jun Zhou
  • Jing-Feng LiEmail author
  • Ke Wang
  • Xiao-Wen Zhang
Article

Abstract

The phase structure and electrical properties of (K,Na)NbO3 (KNN)-based lead-free piezoelectric ceramics with nominal composition Li0.03 (NaxK1−x)0.97Nb0.8Ta0.2O3 (LKNNT, x = 0.50−0.55) were investigated with an emphasis on the influence of Na/K ratio. By XRD and Raman measurements, it was revealed that the phase transition from the co-existence of O1 and T1 to the co-existence of O2 and T2 occurs when x = 0.52. At this Na/K ratio, a peak of dielectric constants was obtained, which also corresponds to a morphotropic phase boundary between T1 and T2 besides that between O1 and O2 in LKNNT ceramics. All the Li0.03 (NaxK1−x)0.97Nb0.8Ta0.2O3 ceramics with x = 0.50 − 0.55 show excellent piezoelectric performance, and the piezoelectric coefficient d*33 can reach as high as 335 pm/V. The room-temperature piezoelectric properties in the present LKNNT ceramics are not sensitive to the change of Na/K ratio, indicating that the orthorhombic to tetragonal phase co-existence dominates the enhancement of piezoelectric properties. However, the results on the piezoelectricity measurement at elevated temperature showed possible to further enhance piezoelectric properties by adjusting Na/K ratio in the tetragonal LKNNT ceramics.

Keywords

Piezoelectric Property Orthorhombic Phase Morphotropic Phase Boundary Electromechanical Coupling Coefficient Sodium Niobate 

Notes

Acknowledgements

This study was supported by the National Nature Science Foundation of China (Grant nos. 50772050 and 50921061) and the Ministry of Science and Technology of China under the Grant 2009CB623304, as well as by the Tsinghua University Initiative Scientific Research Program.

References

  1. 1.
    Saito Y, Takao H, Tani T, Nonoyama T, Takatori K, Homma T, Nagaya T, Nakamura M (2004) Nature 432:84CrossRefGoogle Scholar
  2. 2.
    Shrout TR, Zhang SJ (2007) J Electroceram 19:111CrossRefGoogle Scholar
  3. 3.
    Panda PK (2009) J Mater Sci 44:5049. doi: 1007/s10853-009-3643-0CrossRefGoogle Scholar
  4. 4.
    Egerton L, Dillon DM (1959) J Am Ceram Soc 42:438CrossRefGoogle Scholar
  5. 5.
    Li JF, Wang K, Zhang BP, Zhang LM (2006) J Am Ceram Soc 89:706CrossRefGoogle Scholar
  6. 6.
    Guo Y, Kakimoto K, Ohsato H (2005) Mater Lett 59:241CrossRefGoogle Scholar
  7. 7.
    Hollenstein E, Davis M, Damjanovic D, Setter N (2005) Appl Phys Lett 87:182905CrossRefGoogle Scholar
  8. 8.
    Chang Y, Yang Z, Hou Y, Liu Z, Wang Z (2007) Appl Phys Lett 90:232905CrossRefGoogle Scholar
  9. 9.
    Wu L, Zhang J, Zheng P, Wang C (2007) J Phys D Appl Phys 40:3527CrossRefGoogle Scholar
  10. 10.
    Wang K, Li JF (2010) Adv Funct Mater 20:1924CrossRefGoogle Scholar
  11. 11.
    Fu J, Zuo R, Wang X, Li L (2009) J Phys D Appl Phys 42:012006CrossRefGoogle Scholar
  12. 12.
    Xiao DQ, Wu JG, Wu L, Zhu JG, Yu P, Lin DM, Liao YW, Sun Y (2009) J Mater Sci 44:5408. doi: https://doi.org/10.1007/s10853-009-3543-3 CrossRefGoogle Scholar
  13. 13.
    Dai Y, Zhang X, Zhou G (2007) Appl Phys Lett 90:262903CrossRefGoogle Scholar
  14. 14.
    Zhang BP, Li JF, Wang K, Zhang H (2006) J Am Ceram Soc 89:1605CrossRefGoogle Scholar
  15. 15.
    Dai YJ, Zhang XW, Chen KP (2009) Appl Phys Lett 94:042905CrossRefGoogle Scholar
  16. 16.
    Saito Y, Takao H (2006) Ferroelectrics 338:17CrossRefGoogle Scholar
  17. 17.
    Wang K, Li JF (2007) Appl Phys Lett 91:262902CrossRefGoogle Scholar
  18. 18.
    Klein N, Hollenstein E, Damjanovic D, Trodahl HJ, Setter N (2007) J Appl Phys 102:014112CrossRefGoogle Scholar
  19. 19.
    Rubio-Marcos F, Banares MA, Romero JJ, Fernandez JF (2010) J Raman Spectrosc. doi: https://doi.org/10.1002/jrs.2753 CrossRefGoogle Scholar
  20. 20.
    Jaffe B, Jaffe H, Cook WR (1971) Piezoelectric ceramics. Academic Press, LondonGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jia-Jun Zhou
    • 1
  • Jing-Feng Li
    • 1
    Email author
  • Ke Wang
    • 1
  • Xiao-Wen Zhang
    • 1
  1. 1.Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine ProcessingTsinghua UniversityBeijingChina

Personalised recommendations