Journal of Materials Science

, Volume 52, Issue 19, pp 11337–11345 | Cite as

Giant strain response in 2 mol% Nb-doped (Bi0.5Na0.4K0.1)TiO3 lead-free ceramics

  • Cheng Wang
  • Tiandong Xia
  • Xiaojie Lou
  • Shutao Tian
Ceramics
  • 546 Downloads

Abstract

A series of Nb-doped (Bi0.5Na0.4K0.1)TiO3 lead-free piezoelectric ceramics were fabricated by a conventional solid-state reaction method. The X-ray diffraction patterns reveal a pure perovskite structure for all the samples. A giant strain of 0.34% is achieved at 2 mol% Nb-doping concentration, and the corresponding normalized strain \(d_{33}^*\) reaches 625 pm V−1, which is one of the best results of the BNT-based ceramics. Complex ac impedance data indicate that only the bulk effect contributes to the resistivity. The compositionally induced disruption of long-range ferroelectric order and relaxor transition contributed to the pinched polarization loops as well as the large electric field-induced strain. The results indicate that appropriate Nb-dopant content can remarkably enhance the strain level of (Bi0.5Na0.4K0.1)TiO3 ceramics, making it a promising candidate for actuator applications.

Notes

Acknowledgements

This work was supported by National Science Foundation of China (NSFC Nos. 51372195) and the CSS Project (Grant No. YK2015-0602006). X. J. Lou would like to thank the “One Thousand Youth Talents” program for support.

Compliance with ethical standards

Conflict of interest

The authors declared that they have no conflicts of interest.

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhouPeople’s Republic of China
  2. 2.Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’anPeople’s Republic of China
  3. 3.Gansu Construction Vocational Technical CollegeLanzhouPeople’s Republic of China

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