Large electromechanical strain response in BiFeO3–BaTiO3-based ceramics at elevated temperature

Khan, Salman Ali; Ahmed, Tauseef; Habib, Muhammad; Akram, Fazli; Bae, Jae Seok; Song, Tae Kwon; Lim, Dong-Jin; Jeong, Soon‐Jong; Kim, Myong‐Ho; Lee, Soonil

doi:10.1016/j.jpcs.2021.110133

Cited by 18 publications

(3 citation statements)

References 45 publications

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“…As can be seen, for the sample with PO 2 = 8 Pa, the reflections of both (−103) and (013) are aligned with STO, indicating that the film is completely commensurate with the STO substrate. Thus, it can be concluded that the 8 Pa film has a tetragonal structure (T-type) with lattice constants a = 3.905 Å and c = 4.260 Å. , The a -axis lattice parameter of the BF–BT ceramics is generally in the range of 3.980–4.020 Å, that is, the film prepared under PO 2 of 8 Pa is accompanied by a huge in-plane compressive stress ∼2.4%. − By contrast, both the (−103) and (013) reciprocal spots of the BF–BT film under PO 2 of 4 Pa show different in-plane Q values with the STO substrate, indicating a relaxed state. According to the lattice constants ( a = 3.…”

Section: Resultsmentioning

confidence: 99%

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Liu

Lao

et al. 2022

ACS Appl. Mater. Interfaces

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Ferroelectric solid solutions with composition near the morphotropic phase boundary (MPB) have gained extensive attention recently due to their excellent ferroelectric and piezoelectric properties. Here, we have demonstrated a strategy to realize the controllable preparation of BiFeO 3 −BaTiO 3 (BF−BT) epitaxial films near the MPB. A series of high-quality BF−BT films were fabricated by pulsed laser deposition via adjusting oxygen partial pressure (PO 2 ) using a BF−BT ceramic target. A continuous transition from rhombohedral to tetragonal phase was observed upon increasing PO 2 . Particularly, the film with a pure tetragonal phase exhibited a large remnant polarization of ∼90.6 μC/cm 2 , while excellent piezoelectric performance with an ultrahigh strain (∼0.48%) was obtained in the film with coexisting rhombohedral and tetragonal phases. The excellent ferroelectric and piezoelectric properties endow the BF−BT system near the MPB with great application prospects in lead-free electronic devices.

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Section: Resultsmentioning

confidence: 99%

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Liu

Lao

et al. 2022

ACS Appl. Mater. Interfaces

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“…21,22 Recently, high electromechanical properties and excellent temperature stability have been achieved for lead-based textured piezoelectric ceramics 23 ; however, the BF-BT-based ceramics exhibit temperature-dependent electrostrain. 24,25 Introducing a relaxor with a negative temperature-dependent strain into a BF-BT matrix with a positive temperature behavior can result in good straintemperature stability. However, strong relaxation leads to a strain value less than 0.2% at room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, good temperature stability is a critical parameter for practical applications in actual working conditions 21,22 . Recently, high electromechanical properties and excellent temperature stability have been achieved for lead‐based textured piezoelectric ceramics 23 ; however, the BF–BT‐based ceramics exhibit temperature‐dependent electrostrain 24,25 . Introducing a relaxor with a negative temperature‐dependent strain into a BF–BT matrix with a positive temperature behavior can result in good strain–temperature stability.…”

Section: Introductionmentioning

confidence: 99%

Structural disorder and oxygen octahedron evolution via defect engineering for properties enhancement in BF–BT ceramics

Li,

Zheng,

2024

J Am Ceram Soc.

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The electrostrain properties of bismuth ferrite–barium titanate (BF–BT)‐based ceramics can be well regulated; however, this often occurs at the cost of piezoelectricity, and their electrostrain‐temperature stability is poor. To address these problems, defect engineering has been utilized to enhance the comprehensive properties via the unequal substitution of Na+. In this study, 0.69BiFeO3–0.3BaTiO3–0.01NaxNbO3 (BF–BT–NxN) (x = 0.8, 0.9, 1, 1.1, and 1.2) ceramics with different defect concentrations were prepared. Enhanced piezoelectricity and electrostrain (d33 = 165 pC/N and S = ∼0.22%, respectively) were obtained for the BF–BT–N0.9N ceramic. In particular, excellent temperature stability with a strain variation of only 12% from room temperature to 180°C was achieved. The introduction of NaxNbO3 reduced the degree of distortion of the oxygen octahedron, and the defects altered the local structure and heightened its disorder, leading to an enhancement in both the electrostrain and piezoelectric properties. In addition, the temperature‐dependent evolution of the oxygen octahedron structure was altered by defect engineering. A mutual compensation mechanism for the contribution of structural evolution and domain wall motion to electrostrain has been proposed to explain the excellent temperature stability.

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BiAlO3-modified BiFeO3–BaTiO3 high Curie temperature lead-free piezoelectric ceramics with enhanced performance

Zhou,

Tang,

et al. 2023

Rare Met.

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Large electromechanical strain response in BiFeO3–BaTiO3-based ceramics at elevated temperature

Cited by 18 publications

References 45 publications

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Structural disorder and oxygen octahedron evolution via defect engineering for properties enhancement in BF–BT ceramics

BiAlO3-modified BiFeO3–BaTiO3 high Curie temperature lead-free piezoelectric ceramics with enhanced performance

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Large electromechanical strain response in BiFeO3–BaTiO3-based ceramics at elevated temperature

Cited by 18 publications

References 45 publications

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO3–BaTiO3 Epitaxial Films Near Morphotropic Phase Boundary

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO3–BaTiO3 Epitaxial Films Near Morphotropic Phase Boundary

Structural disorder and oxygen octahedron evolution via defect engineering for properties enhancement in BF–BT ceramics

BiAlO3-modified BiFeO3–BaTiO3 high Curie temperature lead-free piezoelectric ceramics with enhanced performance

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Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary

Ultrahigh Ferroelectric and Piezoelectric Properties in BiFeO₃–BaTiO₃ Epitaxial Films Near Morphotropic Phase Boundary