Article

Ultrahigh piezoelectricity in ferroelectric ceramics by design

  • Nature Materialsvolume 17pages349354 (2018)
  • doi:10.1038/s41563-018-0034-4
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Abstract

Piezoelectric materials, which respond mechanically to applied electric field and vice versa, are essential for electromechanical transducers. Previous theoretical analyses have shown that high piezoelectricity in perovskite oxides is associated with a flat thermodynamic energy landscape connecting two or more ferroelectric phases. Here, guided by phenomenological theories and phase-field simulations, we propose an alternative design strategy to commonly used morphotropic phase boundaries to further flatten the energy landscape, by judiciously introducing local structural heterogeneity to manipulate interfacial energies (that is, extra interaction energies, such as electrostatic and elastic energies associated with the interfaces). To validate this, we synthesize rare-earth-doped Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT), as rare-earth dopants tend to change the local structure of Pb-based perovskite ferroelectrics. We achieve ultrahigh piezoelectric coefficients d33 of up to 1,500 pC N−1 and dielectric permittivity ε33/ε0 above 13,000 in a Sm-doped PMN–PT ceramic with a Curie temperature of 89 °C. Our research provides a new paradigm for designing material properties through engineering local structural heterogeneity, expected to benefit a wide range of functional materials.

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Acknowledgements

F.L. and T.R.S. acknowledge the ONR support. F.L. also acknowledges the support by the National Natural Science Foundation of China (grant numbers 51572214 and 51761145024) and the 111 Project (B14040). S.Z. acknowledges the support from ONRG (N62909-16-1-2126) and ARC (FT140100698). L.-Q.C. is supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-FG02-07ER46417. Z.C. thanks M. Cabral from North Carolina State University for the sample preparation guidance and discussions.

Author information

Author notes

  1. These authors contributed equally: Fei Li, Dabin Lin, Zibin Chen and Zhenxiang Cheng.

Affiliations

  1. Materials Research Institute, Pennsylvania State University, University Park, PA, USA

    • Fei Li
    • , Dabin Lin
    • , ChunChun Li
    • , Long-Qing Chen
    • , Thomas R. Shrout
    •  & Shujun Zhang
  2. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an, China

    • Fei Li
    •  & Zhuo Xu
  3. School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, New South Wales, Australia

    • Zibin Chen
    • , Qianwei Huang
    •  & Xiaozhou Liao
  4. Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales, Australia

    • Zhenxiang Cheng
    • , Jianli Wang
    •  & Shujun Zhang

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Contributions

The project was conceived and designed by F.L., S.Z., L.-Q.C. and T.R.S.; F.L. and L.-Q.C. performed the phase-field simulations; F.L. and D.L. prepared ceramic samples, and performed the dielectric and piezoelectric measurements; Z. Chen, Q.H. and X.L. performed TEM experiments; Z. Cheng., J.W. and C.C.L. performed XRD measurements; F.L., S.Z., L.-Q.C. and T.R.S. wrote the manuscript, and all authors discussed the results.

Competing interests

The authors declare no competing interests.

Corresponding authors

Correspondence to Fei Li or Long-Qing Chen or Shujun Zhang.

Supplementary information

  1. Supplementary Information

    Supplementary Figures 1–13