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Feng W, Luo B, Bian S, Tian E, Zhang Z, Kursumovic A, MacManus-Driscoll JL, Wang X, Li L. Heterostrain-enabled ultrahigh electrostrain in lead-free piezoelectric. Nat Commun 2022; 13:5086. [PMID: 36038595 PMCID: PMC9424301 DOI: 10.1038/s41467-022-32825-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 08/17/2022] [Indexed: 11/17/2022] Open
Abstract
Piezoelectric materials provide high strain and large driving forces in actuators and can transform electrical energy into mechanical energy. Although they were discovered over 100 years ago, scientists are still searching for alternative lead-free piezoelectrics to reduce their environmental impact. Developing high-strain piezoelectric materials has been a long-term challenge, particularly challenging for the design of high-strain polycrystalline piezoelectrics containing no toxic lead element. In this work, we report one strategy to enhance the electrostrain via designing "heterostrain" through atomic-scale defect engineering and mesoscale domain engineering. We achieve an ultrahigh electrostrain of 2.3% at high temperature (220 °C) in lead-free polycrystalline ceramics, higher than all state-of-the-art piezoelectric materials, including lead-free and lead-based ceramics and single crystals. We demonstrate practical solutions for achieving high electrostrain in low-cost environmentally piezoelectric for various applications.
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Affiliation(s)
- Wei Feng
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China
| | - Bingcheng Luo
- College of Science, China Agricultural University, 100083, Beijing, China.
| | - Shuaishuai Bian
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China
| | - Enke Tian
- School of Science, China University of Geosciences, 100083, Beijing, China
| | - Zili Zhang
- School of Science, China University of Geosciences, 100083, Beijing, China
| | - Ahmed Kursumovic
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | | | - Xiaohui Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China.
| | - Longtu Li
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China
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