Influences of holmium substitution on the phase structure and piezoelectric properties of BiFeO3-BaTiO3-based ceramics

Pan, Yongqi; Bai, Xudong; Feng, Jie; Huang, Longfei; Li, Guannan; Chen, Yi

doi:10.1016/j.jallcom.2022.165582

Cited by 14 publications

(3 citation statements)

References 38 publications

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“…The leakage increases with the increasing electric field and the maximum peak is observed (at 17 kV/cm for 7BF-BT-Cu and at 30 kV/cm for 7B 1.05 F-BT) and then decreases. The peak of the J – E curve matches the space charges provided by the switching of the ferroelectric domain under the electric field, that is, the rapid increase in leakage current caused by the rapid accumulation of space charge indicates that the domains of the 7BF-BT-Cu ceramic generate more space charge during the flipping process. The leakage current mechanism of both ceramics can be divided into three regions (Ohmic/SCLC/Ohmic) with increasing E (Figure S7), and the dominant one is SCLC.…”

Section: Resultsmentioning

confidence: 68%

Establishing a Relationship between the Piezoelectric Response and Oxygen Vacancies in Lead-Free Piezoelectrics

Tai,

Zhao,

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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BiFeO 3 −BaTiO 3 (BF−BT)-based lead-free piezoceramics are desired materials for high-temperature applications of piezoelectric sensors with a high Curie temperature and good piezoelectric properties. Recent studies have shown that oxygen vacancies have a significant effect on electrostrain and piezoelectric properties. Interestingly, two different phenomena exist, i.e., the increase in piezoelectric properties is often associated with a decrease in the concentration of oxygen vacancies, while the increase in electrostrain is often associated with an increase in the concentration of oxygen vacancies. Especially, for BF-based ceramics, the physical mechanisms related to property differences caused by oxygen vacancies are rarely reported, which needs further exploration. Here, two ceramics with differences in their oxygen vacancy concentrations are designed. Based on Rayleigh analysis, thermal/electric field-induced domain response (ferroelectric scaling), and macro−microstructural characterization, we can conclude that the transient piezoelectric response and the aging process are significantly affected by the oxygen vacancy concentration. In other words, the increasing concentration of oxygen vacancies in BF−BT ceramics enhances the reversible piezoelectric response contributed by lattice distortion and strengthens the response of domain switching and domain wall motion to electric and thermal fields but deteriorates their aging behavior, which leads to the degradation of piezoelectric performance. Besides, polarization saturation and defect pegging significantly improve the temperature stability of the strain.

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Section: Resultsmentioning

confidence: 68%

Establishing a Relationship between the Piezoelectric Response and Oxygen Vacancies in Lead-Free Piezoelectrics

Tai,

Zhao,

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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“…Generally, BaTiO 3 (BT) is a perovskite-type ferroelectric with a low leakage current and a coercive field of less than 10 kV/cm. 14 Pan et al 15 incorporated BT in BFO ceramics (0.67BFO-0.33BT) and constructed a morphotropic phase boundary, which resulted in eximious dielectric and ferroelectric properties. However, the large P r value and low E b of 0.67BFO-0.33BT ceramics limit the improvement of energy-storage properties.…”

Section: Introductionmentioning

confidence: 99%

Energy‐storage properties of (0.7Bi_0.65Na_0.35Fe_0.3Ti_0.7O₃–0.3Sr_0.85Bi_0.1TiO₃)–NaTaO₃ relaxor under low electric fields

Yang,

Ren,

et al. 2023

Int J Applied Ceramic Tech

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Currently, the energy‐storage properties of dielectric ceramic capacitors have aroused wide attention; however, most materials exhibiting excellent energy‐storage properties are based on high electric fields, which increase the cost of insulation technology. Herein, the energy‐storage and charge–discharge properties of (1 − x)(0.7Bi0.65Na0.35Fe0.3Ti0.7O3–0.3Sr0.85Bi0.1TiO3)–xNaTaO3 (x = 0.03–0.18, abbreviated as 100xNT) ceramics are investigated. 9NT achieves superior energy‐storage properties under a low electric field of 210 kV/cm, with an energy‐storage density (Wrec) of 3.44 J/cm3 and efficiency (η) of 86.6%. The energy‐storage properties exhibit excellent frequency stability in 3–100 Hz as well as temperature stability between 25 and 175°C. Furthermore, the charge–discharge performance features a high‐power density (PD = 67.04 MW/cm3), and an ultrafast discharge speed (t0.9 = 52 ns). This work paves a new way to explore energy‐storage competitive materials under low electric fields.

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“…The energy level diagram of Ho 3+ ions favors various radiative and non-radiative pathways dependent on the activator concentration, excitation wavelengths, host matrices, and their phonon energies. Trivalent holmium ions were introduced to numerous inorganic glasses [ 5 , 6 , 7 , 8 , 9 ], ceramics [ 10 , 11 , 12 ], and other nanoparticles synthesized using the sol–gel method [ 13 ]. Special attention has been paid to Ho 3+ -doped ceramic phosphors with superior luminescence properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Li2MgGeO4:Ho3+

et al. 2022

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In this work, the synthesis and characterization of Li2MgGeO4:Ho3+ ceramics were reported. The X-ray diffraction measurements revealed that the studied ceramics belong to the monoclinic Li2MgGeO4. Luminescence properties were analyzed in the visible spectral range. Green and red emission bands correspondent to the 5F4,5S2→5I8 and 5F5→5I8 transitions of Ho3+ were observed, and their intensities were significantly dependent on activator concentration. Luminescence spectra were also measured under direct excitation of holmium ions or ceramic matrix. Holmium ions were inserted in crystal lattice Li2MgGeO4, giving broad blue emission and characteristic 4f-4f luminescent transitions of rare earths under the selective excitation of the ceramic matrix. The presence of the energy transfer process between the host lattice and Ho3+ ions was suggested.

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Influences of holmium substitution on the phase structure and piezoelectric properties of BiFeO3-BaTiO3-based ceramics

Cited by 14 publications

References 38 publications

Establishing a Relationship between the Piezoelectric Response and Oxygen Vacancies in Lead-Free Piezoelectrics

Establishing a Relationship between the Piezoelectric Response and Oxygen Vacancies in Lead-Free Piezoelectrics

Energy‐storage properties of (0.7Bi_0.65Na_0.35Fe_0.3Ti_0.7O₃–0.3Sr_0.85Bi_0.1TiO₃)–NaTaO₃ relaxor under low electric fields

Synthesis and Characterization of Li2MgGeO4:Ho3+

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Influences of holmium substitution on the phase structure and piezoelectric properties of BiFeO3-BaTiO3-based ceramics

Cited by 14 publications

References 38 publications

Establishing a Relationship between the Piezoelectric Response and Oxygen Vacancies in Lead-Free Piezoelectrics

Establishing a Relationship between the Piezoelectric Response and Oxygen Vacancies in Lead-Free Piezoelectrics

Energy‐storage properties of (0.7Bi0.65Na0.35Fe0.3Ti0.7O3–0.3Sr0.85Bi0.1TiO3)–NaTaO3 relaxor under low electric fields

Synthesis and Characterization of Li2MgGeO4:Ho3+

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Energy‐storage properties of (0.7Bi_0.65Na_0.35Fe_0.3Ti_0.7O₃–0.3Sr_0.85Bi_0.1TiO₃)–NaTaO₃ relaxor under low electric fields