Phase structure and electrical properties of lead-free (1 − 2x)NBT–xKBT–xBT ceramics

  • Yang Li
  • Yong Zhang
  • Huajun Sun
  • Xiaofang Liu
  • Huiting Sui
  • Dingguo Zhou
  • Qinghu Guo
Article

Abstract

The research on Na0.5Bi0.5TiO3 based lead-free piezoelectric ceramics attracted widely attention during last decades. However, the electrical performance is still much inferior to that of lead-based counterparts, which limits its practical applications. Based on this situation, a ternary system of Na0.5Bi0.5TiO3–K0.5Bi0.5TiO3–BaTiO3 [(1 − 2x)NBT–xKBT–xBT] is constructed in this work, hoping to further improve its piezoelectric response. The ceramics were fabricated by the traditional solid state reaction approach, and their structure and electrical performance were studied systematically. Excellent piezoelectric properties with d33 = 146 and kp = 26.5% were obtained at x = 0.08, which was supposed to be related with the coexistence of tetragonal and rhombohedral phases and appropriate grain size. Besides these, a relatively high dielectric constant (εr = 2250), a high remnant polarization (Pr = 31.5 µC/cm2) and low coercive field (Ec = 1.54 kV/mm) were also obtained at this composition. This work provides a new paradigm for the further optimization of NBT–KBT–BT based lead-free piezoelectric ceramics.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 50802066, 51072145, 51272191, 51372181, 51402005, 51672198), Innovative Public Service Platform Special Plan of Shandong (Grant No. 2014CXPT002), Primary Research Plan of Shandong Province (Grant No. 2016CYJS07A03-2), Instruction & Development Project for National Funding Innovation Demonstration Zone of Shandong Province (2016-181-11, 2017-41-1, 2017-41-3), and Central Guiding Local Science and Technology Development Special Funds (Grant No. 2060503).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Yang Li
    • 1
  • Yong Zhang
    • 1
  • Huajun Sun
    • 1
    • 2
  • Xiaofang Liu
    • 3
  • Huiting Sui
    • 2
  • Dingguo Zhou
    • 1
  • Qinghu Guo
    • 1
  1. 1.School of Materials Science and EngineeringWuhan University of TechnologyWuhanPeople’s Republic of China
  2. 2.Advanced Ceramics Institute of Zibo New & High-Tech Industrial Development ZoneZiboPeople’s Republic of China
  3. 3.School of Chemistry, Chemical Engineering and Life SciencesWuhan University of TechnologyWuhanPeople’s Republic of China

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