Large Electrostrictive Strain in (Bi0.5Na0.5)TiO3BaTiO3–(Sr0.7Bi0.2)TiO3 Solid Solutions

Authors

  • Jing Shi,

    1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China
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  • Huiqing Fan,

    Corresponding author
    1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China
    • Author to whom correspondence should be addressed. e-mail: hqfan3@163.com

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  • Xiao Liu,

    1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China
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  • Andrew J. Bell

    1. Institute for Materials Research, School of Process, Environmental and Materials Engineering, University of Leeds, Leeds, UK
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Abstract

Relaxor ferroelectrics (0.94 − x)(Bi0.5Na0.5)TiO3–0.06BaTiO3−x(Sr0.7Bi0.20.1)TiO3 (BNT–BT–xSBT) (0 ≤ x ≤ 0.5), were prepared by a solid-state reaction process, and their structures were characterized by the transmission electron microscopy and Raman spectroscopy. The BNT–BT–0.3SBT has a very high electrostrictive strain S = 0.152% with hysteresis-free behavior, much more than the reported S in other ferroelectrics. SP2 profiles perfectly follow the quadratic relation, which indicates a purely electrostrictive effect with a high electrostrictive coefficient (Q11) of 0.0297 m4/C2. Even, its Q11 keeps at a high level in the temperature range from ambient temperature to 180°C. The field-induced large electrostrictive strain of BNT–BT–0.3SBT was attributed to the existence of ferroelectric nanodomains.

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