Giant electric field–induced strain in lead-free piezoceramics-Reference-Cited by-同舟云学术

Giant electric field–induced strain in lead-free piezoceramics

Published:2022-12-09 Issue:6624 Volume:378 Page:1125-1130
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Huangfu Geng¹^ORCID,Zeng Kun²³^ORCID,Wang Binquan¹,Wang Jie¹,Fu Zhengqian²^ORCID,Xu Fangfang²³^ORCID,Zhang Shujun⁴^ORCID,Luo Haosu⁵^ORCID,Viehland Dwight⁶,Guo Yiping¹^ORCID

Affiliation:

1. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

2. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.

3. School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China.

4. Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW 2500, Australia.

5. Artificial Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China.

6. Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA 24061, USA.

Abstract

Piezoelectric actuators are indispensable over a wide range of industries for their fast response and precise displacement. Most commercial piezoelectric actuators contain lead, posing environmental challenges. We show that a giant strain (1.05%) and a large-signal piezoelectric strain coefficient (2100 picometer/volt) are achieved in strontium (Sr)–doped (K,Na)NbO 3 lead-free piezoceramics, being synthesized by the conventional solid-state reaction method without any post treatment. The underlying mechanism responsible for the ultrahigh electrostrain is the interaction between defect dipoles and domain switching. The fatigue resistance, thermal stability, and strain value (0.25%) at 20 kilovolt/centimeter are comparable with or better than those of commercial Pb(Zr,Ti)O 3 -based ceramics, showing great potential for practical applications. This material may provide a lead-free alternative with a simple composition for piezoelectric actuators and a paradigm for the design of high-performance piezoelectrics.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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