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Lead-free ferroelectrics with giant unipolar strain for high-precision actuators

Author

Listed:
  • Xuefan Zhou

    (Central South University)

  • Jun Zhang

    (Central South University)

  • Hang Luo

    (Central South University)

  • Yan Zhang

    (Central South University)

  • Shiyu Tang

    (Beijing Institute of Technology)

  • Houbing Huang

    (Beijing Institute of Technology)

  • Xi Yuan

    (Central South University)

  • Miao Song

    (Central South University)

  • He Qi

    (University of Science and Technology Beijing)

  • Dou Zhang

    (Central South University)

Abstract

The trade-off between electrostrain and strain hysteresis for piezo/ferroelectric materials largely restrains the development of high precision actuators and remains unresolved over the past few decades. Here, a simple composition of (Bi0.5Na0.5)1-x/100Srx/100TiO3 in the ergodic relaxor state is collaboratively designed through the segregated domain structure with the ferroelectric core, local polarization heterogeneity, and defect engineering. The ferroelectric core can act as a seed to facilitate the field-induced nonpolar-to-polar transition. Together with the internal bias field caused by defect dipoles and adjusted through electric field cycling and heat treatment technology, a giant unipolar strain of 1.03% is achieved in the x = 30 ceramic with a low hysteresis of 27%, while the electric-field-independent large-signal piezoelectric strain coefficient of ~1000 pm/V and ultralow hysteresis of

Suggested Citation

  • Xuefan Zhou & Jun Zhang & Hang Luo & Yan Zhang & Shiyu Tang & Houbing Huang & Xi Yuan & Miao Song & He Qi & Dou Zhang, 2024. "Lead-free ferroelectrics with giant unipolar strain for high-precision actuators," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51082-6
    DOI: 10.1038/s41467-024-51082-6
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    References listed on IDEAS

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    1. Wei Feng & Bingcheng Luo & Shuaishuai Bian & Enke Tian & Zili Zhang & Ahmed Kursumovic & Judith L. MacManus-Driscoll & Xiaohui Wang & Longtu Li, 2022. "Heterostrain-enabled ultrahigh electrostrain in lead-free piezoelectric," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
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