Composition, electric-field and temperature induced domain evolution in lead-free Bi0.5Na0.5TiO3-BaTiO3-SrTiO3 solid solutions by piezoresponse force microscopy

Liú, Dan; Tian, Chengyue; Ma, Chuanguo; Luo, Laihuo; Tang, Yin; Wang, Tao; Shi, Wangzhou; Sun, Dazhi; Wang, Feifei

doi:10.1016/j.scriptamat.2016.06.002

Cited by 30 publications

(7 citation statements)

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“…Temperature dependent of the wave number and full width at half maximum of the Ti‐localized mode ( ω 4, ω 5 ) in (0.935‐ x )Bi 0.5 Na 0.5 TiO 3 ‐0.065BaTiO 3 ‐ x SrTiO 3 ceramics. The vertical dashed lines correspond to the macroscopic characteristic temperatures T d , T DV and T m determined by dielectric measurements [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

“…The large normalized strain makes them potential replacements for typical lead zirconate titanate in on/off‐type actuators. Regarding the electric field‐induced strain, several mechanisms were proposed to elucidate the strain behavior through X‐ray neutron diffraction, in situ transmission electron microscopy, in situ piezoresponse force microscopy, and conventional electrical measurements . The BNT‐based solid solutions have complicated structures and even a monoclinic phase with space group C c was proposed in BNT …”

Section: Introductionmentioning

confidence: 99%

“…These physical features can be characterized via the variations of frequency, intensity, and full width at half maximum (FWHM) of the phonon modes . Under these considerations, ternary (0.935‐ x )Bi 0.5 Na 0.5 TiO 3 ‐0.065BaTiO 3 ‐ x SrTiO 3 (BNBST x ) solid solution, proposed in our previous work, owning large fatigue‐resistant strain at a critical composition, was investigated here . The dielectric functions and phonon modes of BNBST x system with three representative compositions x of 0.02, 0.18 and 0.22, were investigated by optical ellipsometry and Raman scattering.…”

Section: Introductionmentioning

confidence: 99%

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Phonon behaviors and dielectric functions in Bi_0.5Na_0.5TiO₃‐based ceramics by Raman scattering and optical ellipsometry

et al. 2018

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The dielectric functions and lattice vibrations of (0.935-x)Bi 0.5 Na 0.5 TiO 3 -0.065BaTiO 3 -xSrTiO 3 (BNBSTx) ceramics were investigated by temperaturedependent spectroscopic ellipsometry and Raman scattering. Based on the analysis of dielectric functions with the Tauc-Lorentz dispersion model, it was found that the band gap and the temperature coefficient increased with the addition of SrTiO 3 . Moreover, the frequency, intensity and/or full width at half maximum of phonon modes related to Bi and Ti-localized phonon modes exhibited local maximum/minimum around the depolarization temperature and permittivity-maximum temperature, which indicated the ongoing structural transformation. In addition, the Sr introduction affected the TiO 6 tilting and the off-center displacement of Ti 4+ . These results seem to be significant for the enhanced response functions with the addition of SrTiO 3 in BNBSTx ceramics.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phonon behaviors and dielectric functions in Bi_0.5Na_0.5TiO₃‐based ceramics by Raman scattering and optical ellipsometry

et al. 2018

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“…Currently, driven by concerns regarding lead toxicity and environmental regulations, lead‐free perovskite Bi 0.5 Na 0.5 TiO 3 (BNT) based piezoelectric ceramics have been widely studied as alternatives to lead‐containing counterparts due to their large ferroelectric polarization and high piezoelectric properties . The pseudobinary solid solution with BaTiO 3 (BT) or Bi 0.5 K 0.5 TiO 3 (BKT) presents a morphotropic phase boundary(MPB) between the rhombohedral ( R ) and tetragonal ( T ) symmetries at about 0.20 mol BKT or 0.06 mol BT, respectively, accompanied by the best small signal piezoelectric properties .…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric‐quasiferroelectric‐ergodic relaxor transition and multifunctional electrical properties in Bi_0.5Na_0.5TiO₃‐based ceramics

Zhou

et al. 2017

J Am Ceram Soc

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A-site substituted 0.88(Bi 0.5 Na 0.5 ) 1Àx (Li 0.5 Nd 0.5 ) x TiO 3 -0.12BaTiO 3 (BNTLNx-BT12) ceramics were synthesized using a conventional solid-state reaction route. The structural transformation and miscellaneous electrical properties were systematically investigated. The A-site modification induced two sequence transitions from ferroelectric tetragonal (T) to quasi-ferroelectric pseudocubic (PC) phase, followed closely by the second transition from non-ergodic to ergodic relaxor (NR-ER), and finally to dynamic polar nanoregions (PNRs). The significant enhancement in piezoelectric activity, strain response, broad plateau-like maximum dielectric permittivity over a large temperature range and energy-storage level at different compositions may be attributed to the compositionally-induced T-PC to NR-ER transition and the alignment of dynamically-fluctuating PNRs, respectively. The evolution of multifunctional electrical properties, associated with the variations in structure/microstructure, might provide a new insight to investigate the underlying mechanism of structure-electrical properties relationship in ferroelectric solid solutions. K E Y W O R D Sdielectric properties, ferroelectricity, phase transitions, piezoelectricity

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“…Three perovskite systems based on BaTiO 3 , (K,Na)NbO 3 and Bi 1/2 Na 1/2 TiO 3 have been identified as competitive materials that feature an electric field-induced giant strain akin to or even surpassing the strain of PZT-based materials891011. Generally, their large strain response is associated with a reversible field-induced phase transition from a macroscopic ergodic relaxor state to a ferroelectric state with a long-range order1213, as recently demonstrated by piezoresponse force microscopy (PFM)14. Nevertheless, the technological use of these materials thus far remains limited, mainly because of their large hysteresis and the large electric fields required to trigger the phase transition1015.…”

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Revealing the core-shell interactions of a giant strain relaxor ferroelectric 0.75Bi1/2Na1/2TiO3-0.25SrTiO3

Liu

Acosta

Wang

et al. 2016

Sci Rep

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Lead-free relaxor ferroelectrics that feature a core-shell microstructure provide an excellent electromechanical response. They even have the potential to replace the environmentally hazardous lead-zirconia-titanate (PZT) in large strain actuation applications. Although the dielectric properties of core-shell ceramics have been extensively investigated, their piezoelectric properties are not yet well understood. To unravel the interfacial core-shell interaction, we studied the relaxation behaviour of field-induced ferroelectric domains in 0.75Bi1/2Na1/2TiO3-0.25SrTiO3 (BNT-25ST), as a typical core-shell bulk material, using a piezoresponse force microscope. We found that after poling, lateral domains emerged at the core-shell interface and propagated to the shell region. Phase field simulations showed that the increased electrical potential beneath the core is responsible for the in-plane domain evolution. Our results imply that the field-induced domains act as pivotal points at the coherent heterophase core-shell interface, reinforcing the phase transition in the non-polar shell and thus promoting the giant strain.

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Composition, electric-field and temperature induced domain evolution in lead-free Bi0.5Na0.5TiO3-BaTiO3-SrTiO3 solid solutions by piezoresponse force microscopy

Cited by 30 publications

References 28 publications

Phonon behaviors and dielectric functions in Bi_0.5Na_0.5TiO₃‐based ceramics by Raman scattering and optical ellipsometry

Phonon behaviors and dielectric functions in Bi_0.5Na_0.5TiO₃‐based ceramics by Raman scattering and optical ellipsometry

Ferroelectric‐quasiferroelectric‐ergodic relaxor transition and multifunctional electrical properties in Bi_0.5Na_0.5TiO₃‐based ceramics

Revealing the core-shell interactions of a giant strain relaxor ferroelectric 0.75Bi1/2Na1/2TiO3-0.25SrTiO3

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Composition, electric-field and temperature induced domain evolution in lead-free Bi0.5Na0.5TiO3-BaTiO3-SrTiO3 solid solutions by piezoresponse force microscopy

Cited by 30 publications

References 28 publications

Phonon behaviors and dielectric functions in Bi0.5Na0.5TiO3‐based ceramics by Raman scattering and optical ellipsometry

Phonon behaviors and dielectric functions in Bi0.5Na0.5TiO3‐based ceramics by Raman scattering and optical ellipsometry

Ferroelectric‐quasiferroelectric‐ergodic relaxor transition and multifunctional electrical properties in Bi0.5Na0.5TiO3‐based ceramics

Revealing the core-shell interactions of a giant strain relaxor ferroelectric 0.75Bi1/2Na1/2TiO3-0.25SrTiO3

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Phonon behaviors and dielectric functions in Bi_0.5Na_0.5TiO₃‐based ceramics by Raman scattering and optical ellipsometry

Phonon behaviors and dielectric functions in Bi_0.5Na_0.5TiO₃‐based ceramics by Raman scattering and optical ellipsometry

Ferroelectric‐quasiferroelectric‐ergodic relaxor transition and multifunctional electrical properties in Bi_0.5Na_0.5TiO₃‐based ceramics