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Journal of Materials Science

, Volume 54, Issue 6, pp 4523–4531 | Cite as

Influence of compositional ratio K/Na on structure and piezoelectric properties in [(Na1−xKx)0.5Bi0.5]Ti0.985Ta0.015O3 ceramics

  • Qiang LiEmail author
  • Chao Wang
  • Weiming Zhang
  • Huiqing Fan
Ceramics
  • 148 Downloads

Abstract

[(Na1−xKx)0.5Bi0.5]Ti0.985Ta0.015O3 (abbreviated as Ta-NK100x) lead-free ceramics with good piezoelectric properties were prepared using a solid-state reaction method. The structure and electrical properties of Ta-NK100x had been systemically investigated. The highest bipolar strain of 0.458% and the unipolar strain 0.448% are achieved at x = 0.18 at 60 kV/cm. Meanwhile, the corresponding normalized strain \( \left( {d_{33}^{*} } \right) \) reaches 747 pm/V. In addition, the unipolar strain of the poled Ta-NK18 increases to 0.537%, and corresponding \( d_{33}^{*} \) increases slightly to 894.5 pm/V at 60 kV/cm. The electric-field-induced phase transition between ferroelectric and relaxor is found to play a dominant role in the origin of the large strain. Moreover, the strain behavior remains stable within 105 switching cycles which indicating the prepared ceramics are promising candidates for actuators and stress sensors.

Notes

Acknowledgements

This work is supported by the National Nature Science Foundation (51672220), the SPDRF (20116102130002), the 111 Program (B08040) of MOE, the National Defense Science Foundation (32102060303), the Xi’an Science and Technology Foundation (2017086CGRC049-XBGY005, CXY1706-5), the SKLP Foundation (KP201421, KP201523), the Shaanxi Provincial Science Foundation (2017KW-018), and the NPU Gaofeng Project (17GH020824) of China. We would like to thank the Analytical and Testing Center of Northwestern Polytechnical University.

Compliance with ethical standards

Conflict of interest

All authors declare that they have no conflict of interest.

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

Authors and Affiliations

  1. 1.State Key Laboratory of Solidification Processing, School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’anPeople’s Republic of China

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