Journal of Electroceramics

, Volume 21, Issue 1–4, pp 34–38 | Cite as

Studies on new systems of BNT-based lead-free piezoelectric ceramics

  • D. Q. Xiao
  • D. M. Lin
  • J. G. Zhu
  • P. Yu


Several new systems of Bi0.5Na0.5TiO3-based lead-free piezoelectric ceramics were proposed based on the design of the multiple complex in the A-site of ABO3 compounds. These ceramics were prepared by conventional ceramic techniques. The comparison of the piezo- and ferroelectric properties of these ceramics with those of the best properties of the Bi0.5Na0.5TiO3-based lead-free piezoelectric ceramics published recently shows that these ceramics of the new systems have better ferroelectric and piezoelectric performance, and better temperature characteristic of the properties. Among these materials, Bi0.5(Na1−xy K x Li y )0.5TiO3 possesses higher piezoelectric constant (d 33 = 230.8 pC/N), higher electromechanical couple factor (k p = 0.41), larger remanent polarization (P r = 40 μC/cm2) and a better PE hysteresis loop below 200 °C. Practical devices such as ceramic middle frequency filters and buzzers have been made by using these lead-free piezoelectric ceramics.


Bi0.5Na0.5TiO3 Lead-free piezoelectric ceramics Piezoelectric constant Electromechanical couple factor PE hysteresis loop 



This work was supported by the projects of NSFC(50410179) and (59972020), and NAMMC(2001-AA325060)


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Materials ScienceSichuan UniversityChengduPeople’s Republic of China

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