Electrical and luminescence properties, and energy band structure of SrBi2-Er Nb2O9 multifunctional ceramics

Zhang, Yuying; Chu, Ruiqing; Xu, Zhijun; Zhang, Shangzhou; Zhang, Chao; Li, Guorong

doi:10.1016/j.ceramint.2021.07.279

Cited by 8 publications

(5 citation statements)

References 51 publications

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“…The 2P r value obtained in our study is notably lower than the previously reported value for SBN. 63 This reduction in 2P r can be attributed to several factors. First, it is connected to the challenge of domain switching, which arises due to a decrease in crystal grain size and a reduction in the unit cell volume.…”

Section: Resultsmentioning

confidence: 99%

“…10,37,60,61 Oxygen vacancies, which are defects formed due to the volatilization of Bismuth during the sintering process, play a crucial role in conduction at high temperatures and contribute to a peak in the dielectric loss at the transition temperature. 63 Figure 16 displays the polarization-electric field (P-E) hysteresis loop of bismuth-substituted SBN ceramic specimens measured at room temperature. The remnant polarization (P r ) and coercive field (E c ) values calculated from the loops are summarized in Table V.…”

Section: Resultsmentioning

confidence: 99%

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Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr_1−XBi_2+2X/3Nb₂O₉ Ceramics

Singh,

Gautam,

Luthra

et al. 2023

ECS J. Solid State Sci. Technol.

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In this study, the authors focused on the preparation and characterization of Lead-free ferroelectric ceramics known as Sr1−XBi2+2X/3Nb2O9: SBBNX, where 0.0≤ × ≤0.4. The ceramics were synthesized using a conventional solid-state reaction route. The researchers performed X-ray diffraction (XRD) analysis to confirm the phase formation and employed the Rietveld refinement technique. The results indicated that the prepared SBBNX ceramics exhibited a single phase with an orthorhombic structure, specifically belonging to the A21am space group. All samples were subjected to analysis using field emission scanning electron microscopy (FESEM) to investigate their surface morphology. The micrographs revealed a uniform distribution of grains (of size 2–4 μm ) on the surface, with distinct grain boundaries. An increasing trend in both the dielectric constant (from 99 to 220 at room temperature) and transition temperature (from 396 °C to 490 °C) was noted with an increase of Bi content in SBN. The researchers estimated the activation energies by analyzing the Arrhenius plots of the ac conductivity. The obtained values ranged from 0.62 to 1.25 eV, indicating the presence of motion of oxygen vacancies in the SBBNX ceramics. The primary objective of this study was to optimize the Sr/Bi ratio in SBBNX ceramics to enhance their potential use in non-volatile random access memory (NVRAM) applications and high-temperature piezoelectric devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr_1−XBi_2+2X/3Nb₂O₉ Ceramics

Singh,

Gautam,

Luthra

et al. 2023

ECS J. Solid State Sci. Technol.

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“…where a is the absorption coefficient, h is the Planck constant, v is the frequency for incident photon, m is 1/2 for direct band gap and 2 for indirect band gap, B is constant. According to previous studies, the direct band gap formula is appropriately employed here [51][52][53]. The calculated Eg values of samples are displayed on the Fig.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

Effectively improved piezoelectricity in high-temperature Arrhenius CBT ceramics by modifying potential energy profile and spontaneous polarization

Xi,

Liu,

Qiao

et al. 2024

Journal of Advanced Ceramics

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“…For example, SrBi 2 Nb 2 O 9 :Eu 3þ and SrBi 2 Nb 2 O 9 :Er 3þ . [18][19][20] As far as we know, there is no report on PL characteristics of SrBi 2 Nb 2 O 9 :xDy 3þ phosphors. In this article, a set of SBN:xDy 3þ white light-emitting phosphors was synthesized by high-temperature solid reaction.…”

Section: Introductionmentioning

confidence: 99%

Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi₂Nb₂O₉:Dy³⁺

Yang,

Cui,

Zhang

et al. 2024

Physica Status Solidi (b)

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A group of white light‐emitting phosphors SrBi2Nb2O9:xDy3+ (SBN:xDy3+) are prepared by high‐temperature solid reaction. The crystal phase, morphology, and photoluminescence (PL) characteristics of the prepared SBN:xDy3+ are analyzed. The X‐ray diffraction results prove that the synthesized samples are pure phase, in which the shift of the main peak depicted that crystal interplanar distance decreases after Dy3+ replacing Bi3+. The scanning electron microscope results show that the average crystal size of the sample is ≈1–10 μm. Energy dispersive X‐ray spectroscopy shows that the ratio of element composition of the SBN:xDy3+ is similar to the theoretical calculation. The PL excitation illustrates the excitation peaks mainly exist at 389, 399, 426, and 450 nm due to the transitions of Dy3+. For PL, the emission peaks of samples with different doping concentrations are centered at 479 and 573 nm. The ratio of yellow intensity to blue intensity indicates that Dy3+ is located at a high symmetry site, which has the possibility to produce suitable white light. The Commission Internationale de l’Eclairage coordinates of the SBN:xDy3+ are located near the standard white light coordinate. All these results prove that SrBi2Nb2O9:xDy3+ can be a potential material in the white light application.

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Electrical and luminescence properties, and energy band structure of SrBi2-Er Nb2O9 multifunctional ceramics

Cited by 8 publications

References 51 publications

Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr_1−XBi_2+2X/3Nb₂O₉ Ceramics

Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr_1−XBi_2+2X/3Nb₂O₉ Ceramics

Effectively improved piezoelectricity in high-temperature Arrhenius CBT ceramics by modifying potential energy profile and spontaneous polarization

Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi₂Nb₂O₉:Dy³⁺

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Electrical and luminescence properties, and energy band structure of SrBi2-Er Nb2O9 multifunctional ceramics

Cited by 8 publications

References 51 publications

Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr1−XBi2+2X/3Nb2O9 Ceramics

Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr1−XBi2+2X/3Nb2O9 Ceramics

Effectively improved piezoelectricity in high-temperature Arrhenius&nbsp;CBT ceramics&nbsp;by modifying potential energy profile and spontaneous polarization

Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi2Nb2O9:Dy3+

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Product

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Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr_1−XBi_2+2X/3Nb₂O₉ Ceramics

Exploration of the Structural, Dielectric, Ferroelectric, and Piezoelectric Properties in Non-stoichiometric Sr_1−XBi_2+2X/3Nb₂O₉ Ceramics

Effectively improved piezoelectricity in high-temperature Arrhenius CBT ceramics by modifying potential energy profile and spontaneous polarization

Structural and Photoluminescence Characteristics of a Novel Single‐Phase White‐Emitting Phosphor SrBi₂Nb₂O₉:Dy³⁺