Influence of A-site non-stoichiometry on electromechanical properties of Sr(Hf0.5Zr0.5)O3-modified Bi0.5(Na0.8K0.2)0.5TiO3 piezoelectric ceramics

Gupta, Sanu K.; Gibbons, Brady J.; Mardilovich, Peter; Cann, David P.

doi:10.1007/s10853-020-05220-2

Cited by 8 publications

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“…For such relaxors, it is believed that with the application of high enough electric fields, a reversible transition to a polar phase occurs along with the re‐establishment of long‐range FE order. Similar trends have been observed in earlier studies which established that FE‐relaxor crossover exhibits enhanced electromechanical properties 24,25,26,27 …”

Section: Resultssupporting

confidence: 90%

Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi_1/2(Na_1/2K_1/2)_1/2TiO₃]‐xPbZrO₃ system

et al. 2020

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The solid solution (1 − x)[Bi 1/2 (Na 1/2 K 1/2) 1/2 TiO 3 ]-xPbZrO 3 , (0.00 ≤ x ≤ 0.12) was investigated to examine the phase equilibria, dielectric and electromechanical properties. The composition corresponding to x = 0.00 exhibits tetragonal symmetry with the expected classical ferroelectric (FE) behavior. The system exhibited FE to relaxor crossover with the addition of lead zirconate at the composition x = 0.05. This is indicated by typical relaxor characteristics such as a transition to the global pseudocubic phase, a constriction in the FE hysteresis loop, and a sudden decrease in the negative strain accompanied by an increase in maximum strain. Most notably, with a further increase in x (>0.05), there is evidence for a return to a FE phase that exhibits classical FE characteristics. The combined results demonstrate that there exists a narrow FE-relaxor boundary near x = 0.05, where FE and relaxor phases coexist. At the critical composition, enhancement in the piezoelectric properties, including an increase in the effective d * 33 (350 pm/V) was observed. This transition in the electromechanical properties is consistent with changes observed in the phase equilibria for this solid solution. The crystal structure transitions from tetragonal symmetry for x = 0.00, to pseudocubic symmetry for the relaxor compositions (x = 0.05), and finally to a lower symmetry perovskite phase for the re-entrant FE phase (x> 0.05). This composition-induced transition from FE to relaxor to a re-entrant FE state in the (1 − x)[Bi 1/2 (Na 1/2 K 1/2) 1/2 TiO 3 ]-xPbZrO 3 system is unusual among relaxor FE systems and thus is of great scientific and technological interest.

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Section: Resultssupporting

confidence: 90%

Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi_1/2(Na_1/2K_1/2)_1/2TiO₃]‐xPbZrO₃ system

et al. 2020

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Large strain improvement of lead-free (1−x) Bi0.5Na0.42K0.08Zr0.02Ti0.98O3–xBa(Nb0.5Fe0.5)O3 piezoelectric ceramics

Manotham,

Butnoi

2024

J Mater Sci

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Influence of A-site isovalent doping on structural and electrical properties of Bi-based lead-free piezoelectric ceramics

et al. 2022

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Influence of A-site non-stoichiometry on electromechanical properties of Sr(Hf0.5Zr0.5)O3-modified Bi0.5(Na0.8K0.2)0.5TiO3 piezoelectric ceramics

Cited by 8 publications

References 78 publications

Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi_1/2(Na_1/2K_1/2)_1/2TiO₃]‐xPbZrO₃ system

Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi_1/2(Na_1/2K_1/2)_1/2TiO₃]‐xPbZrO₃ system

Large strain improvement of lead-free (1−x) Bi0.5Na0.42K0.08Zr0.02Ti0.98O3–xBa(Nb0.5Fe0.5)O3 piezoelectric ceramics

Influence of A-site isovalent doping on structural and electrical properties of Bi-based lead-free piezoelectric ceramics

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Influence of A-site non-stoichiometry on electromechanical properties of Sr(Hf0.5Zr0.5)O3-modified Bi0.5(Na0.8K0.2)0.5TiO3 piezoelectric ceramics

Cited by 8 publications

References 78 publications

Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi1/2(Na1/2K1/2)1/2TiO3]‐xPbZrO3 system

Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi1/2(Na1/2K1/2)1/2TiO3]‐xPbZrO3 system

Large strain improvement of lead-free (1−x) Bi0.5Na0.42K0.08Zr0.02Ti0.98O3–xBa(Nb0.5Fe0.5)O3 piezoelectric ceramics

Influence of A-site isovalent doping on structural and electrical properties of Bi-based lead-free piezoelectric ceramics

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Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi_1/2(Na_1/2K_1/2)_1/2TiO₃]‐xPbZrO₃ system

Re‐entrant ferroelectric relaxor phenomena in the (1 − x)[Bi_1/2(Na_1/2K_1/2)_1/2TiO₃]‐xPbZrO₃ system