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Large strain and strain memory effect in bismuth ferrite lead-free ceramics

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Abstract

An electric-field-induced strain in ferroelectric materials has extensive applications in actuators and sensors. BiFeO3 (BFO) ceramic is a promising candidate for high-temperature electromechanical coupling applications due to its exceptionally high Curie temperature (Tc ∼ 825 °C). Here, we reported an enhanced electric-field-induced strain in defective BFO ceramics. These defective BFO ceramics exhibit highly asymmetric SE loops along with a strain memory effect. A large peak-to-peak strain (Sp–p) of 0.66% is achieved in the Bi2O3-deficient sample with x = −0.15, which is the largest strain value ever obtained in BFO-based ceramics. A strain shape memory of 0.24% is observed in samples with x = 0.09 due to the presence of defects and the orientation of the defect-dipoles. The combination of large strain and high TC would make the defective BiFeO3-based ceramics one of the most important candidates for high-temperature electromechanical coupling applications.

Graphical abstract: Large strain and strain memory effect in bismuth ferrite lead-free ceramics

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Publication details

The article was received on 22 Jul 2017, accepted on 16 Aug 2017 and first published on 17 Aug 2017


Article type: Communication
DOI: 10.1039/C7TC03282J
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Large strain and strain memory effect in bismuth ferrite lead-free ceramics

    J. Lv, W. Gao, J. Li, T. Li, C. Long, X. Lou and J. Wu, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC03282J

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