Domain switching contribution to the ferroelectric, fatigue and piezoelectric properties of lead-free Bi0.5(Na0.85K0.15)0.5TiO3 films

Jieyu Chen; Zhehong Tang; Ruonan Tian; Yulong Bai; Shifeng Zhao; Hao Zhang

doi:10.1039/C6RA04262G

Domain switching contribution to the ferroelectric, fatigue and piezoelectric properties of lead-free Bi_0.5(Na_0.85K_0.15)_0.5TiO₃ films

Jieyu Chen,^a Zhehong Tang,^a Ruonan Tian,^a Yulong Bai,^a Shifeng Zhao*^a and Hao Zhang^b

* Corresponding authors

^a School of Physical Science and Technology & Inner Mongolia Key Lab of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot, PR China
E-mail: zhsf@imu.edu.cn
Fax: +86 471 499 3141
Tel: +86 471 499 3141

^b Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA

Abstract

Lead-free Bi_0.5(Na_0.85K_0.15)_0.5TiO₃ films have been prepared via a solution-gelation technique. The microstructure, domain structure, ferroelectric, fatigue and piezoelectric properties were investigated systematically. This shows that the films have a single-phase perovskite structure and show outstanding ferroelectric, fatigue and piezoelectric properties at room temperature. The maximum piezoelectric coefficient value of the films reaches approximately 158.94 pm V⁻¹, which is comparable to that of polycrystalline lead-based films. Thus good ferroelectric, fatigue and piezoelectric properties are attributed to the well-defined electrical domain structure and its switching for Bi_0.5(Na_0.85K_0.15)_0.5TiO₃ films. The present results suggest that Bi_0.5(Na_0.85K_0.15)_0.5TiO₃ films can be used as a candidate for lead-free films in piezoelectric micro-electro-mechanical systems.

Article information

https://doi.org/10.1039/C6RA04262G

Article type

Paper

Submitted

18 Feb 2016

Accepted

25 Mar 2016

First published

30 Mar 2016

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RSC Adv., 2016,6, 33834-33842

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Domain switching contribution to the ferroelectric, fatigue and piezoelectric properties of lead-free Bi_0.5(Na_0.85K_0.15)_0.5TiO₃ films

J. Chen, Z. Tang, R. Tian, Y. Bai, S. Zhao and H. Zhang, RSC Adv., 2016, 6, 33834 DOI: 10.1039/C6RA04262G

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Domain switching contribution to the ferroelectric, fatigue and piezoelectric properties of lead-free Bi_0.5(Na_0.85K_0.15)_0.5TiO₃ films

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Domain switching contribution to the ferroelectric, fatigue and piezoelectric properties of lead-free Bi_0.5(Na_0.85K_0.15)_0.5TiO₃ films

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