Enhanced piezoelectric properties and excellent thermal stabilities of cobalt-modified Aurivillius-type calcium bismuth titanate (CaBi4Ti4O15)

Zhao, Tongtong; Wang, Chunming; Wang, Chunlei; Wang, Yiming; Dong, Shuxiang

doi:10.1016/j.mseb.2015.08.006

Cited by 41 publications

(15 citation statements)

References 35 publications

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“…30,31 In view of the difference of the mean ionic radius caused by the introduction of (KCe) into the SNBT ceramics, the tilting and rotation of oxygen in octahedral TiO 6 have been increased, which should be responsible for the enhanced ferroelectric properties. 32 Meanwhile, the increased E c is consistent with the assumption (Fig. 4) that oxygen vacancies are formed.…”

Section: Resultssupporting

confidence: 86%

Structure and electrical properties of lead-free Sr_1−x(K,Ce)_x/2(Na_0.5Bi_0.5)Bi₄Ti₅O₁₈ piezoelectric ceramics

Yao

Chu

et al. 2016

RSC Adv.

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Section: Resultssupporting

confidence: 86%

Structure and electrical properties of lead-free Sr_1−x(K,Ce)_x/2(Na_0.5Bi_0.5)Bi₄Ti₅O₁₈ piezoelectric ceramics

Yao

Chu

et al. 2016

RSC Adv.

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“…A-site substitution is more effective than B-site substitution because the cations at B-sites are similar in size and can hardly make a major contribution to the polarization process. Consequently, most reports on enhancing the ferroelectric and piezoelectric properties of SBT ceramics concentrate on A-site rather than B-site modification [11]. It is found that Ce (A-site substitution) doped in Bi 4 Ti 3 O 12 ceramics can appropriately enhance the dielectric and ferroelectric properties [12].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution and dielectric properties of Ce-doped SrBi4Ti4O15 ceramics synthesized via glycine-nitrate process

et al. 2018

PAC

136

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Ce-doped strontium bismuth titanate (SrBi 4 Ti 4 O 15 , SBT) powders were prepared by glycine-nitrate process at 400-500°C and the ceramics were sintered at 980°C. The phase composition, morphology and electric properties were investigated. It was found that the calcined powders consist of a single phase SBT and the calcination temperature is lower than that for the conventional solid state method. The morphology of Cedoped SBT is flake-like and the layer size decreases with Ce-addition from 12 to 2 µm confirming that the addition of Ce 3+ inhibits grain growth. The Curie temperature of Ce-doped SBT increased for about 20°C compared to the pure SBT. The tan δ was ∼0.005 at 35°C and even below 0.05 up to 400°C. The temperature coefficient of dielectric constant was ∼0.012 and the rate of frequency change was 0.01-0.04, which indicated the high stability of dielectric properties of the Ce-doped SBT. Impedance analysis revealed that the conduction mechanism of the Ce-doped SrBi 4 Ti 4 O 15 ceramics is mainly grain conduction.

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“…The E a of the pristine CBN is only about 1.08 eV, manifesting that the electrical conduction behavior is dominated by the oxygen vacancy migration in the grain. 4,47,49 In contrast, the CBNCC-0.015 ceramic exhibits a higher E a (∼1.33 eV), implying the Ce−Cr cosubstitution effectively reduces the oxygen vacancy contents in the grain of the CBN ceramic, which could be accountable for the enhanced DC resistivity.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Realizing Enhanced Electrical Properties of CaBi₂Nb₂O₉-Based High-Temperature Piezoceramics by Constructing a Pseudophase Boundary

Zhu

Chen

Liu

et al. 2022

ACS Appl. Electron. Mater.

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It is well-known that the regulation of the phase boundary is an efficient strategy to boost the piezoelectric performance of perovskite structure ceramics. However, it is seldomly used in the bismuth-layered structure high-temperature piezoelectric ceramic research field because of the lack of an available morphotropic phase boundary (MPB). In this work, a pseudo-MPB was constructed by the dual introduction of Ce and Cr ions to the CBN ceramic, which remarkably optimized the piezoelectricity and ferroelectricity. Furthermore, the Ce and Cr ions evidently suppressed the oxygen vacancy concentration, leading to improvements in resistivity and thermal stability. Optimized performances with a satisfactory piezoelectric coefficient (d 33 ∼ 17 pC/N) and an elevated resistivity (ρ) of 1.35 × 105 Ω·cm (at 600 °C) were realized in the Ca0.97Ce0.03Bi2Nb1.985Cr0.015O9 ceramic, accompanied by a high Curie temperature (T C ∼ 934 °C) and good piezoelectric thermal stability. These results reveal that the Ca0.97Ce0.03Bi2Nb1.985Cr0.015O9 ceramic could be a prospective piezoelectric material for sensor applications at high temperatures. Moreover, this work provides a feasible strategy for optimizing the piezoelectric performances of the CBN-based ceramics by constructing the pseudo-MPB.

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Enhanced piezoelectric properties and excellent thermal stabilities of cobalt-modified Aurivillius-type calcium bismuth titanate (CaBi4Ti4O15)

Cited by 41 publications

References 35 publications

Structure and electrical properties of lead-free Sr_1−x(K,Ce)_x/2(Na_0.5Bi_0.5)Bi₄Ti₅O₁₈ piezoelectric ceramics

Structure and electrical properties of lead-free Sr_1−x(K,Ce)_x/2(Na_0.5Bi_0.5)Bi₄Ti₅O₁₈ piezoelectric ceramics

Microstructure evolution and dielectric properties of Ce-doped SrBi4Ti4O15 ceramics synthesized via glycine-nitrate process

Realizing Enhanced Electrical Properties of CaBi₂Nb₂O₉-Based High-Temperature Piezoceramics by Constructing a Pseudophase Boundary

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Enhanced piezoelectric properties and excellent thermal stabilities of cobalt-modified Aurivillius-type calcium bismuth titanate (CaBi4Ti4O15)

Cited by 41 publications

References 35 publications

Structure and electrical properties of lead-free Sr1−x(K,Ce)x/2(Na0.5Bi0.5)Bi4Ti5O18 piezoelectric ceramics

Structure and electrical properties of lead-free Sr1−x(K,Ce)x/2(Na0.5Bi0.5)Bi4Ti5O18 piezoelectric ceramics

Microstructure evolution and dielectric properties of Ce-doped SrBi4Ti4O15 ceramics synthesized via glycine-nitrate process

Realizing Enhanced Electrical Properties of CaBi2Nb2O9-Based High-Temperature Piezoceramics by Constructing a Pseudophase Boundary

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Structure and electrical properties of lead-free Sr_1−x(K,Ce)_x/2(Na_0.5Bi_0.5)Bi₄Ti₅O₁₈ piezoelectric ceramics

Structure and electrical properties of lead-free Sr_1−x(K,Ce)_x/2(Na_0.5Bi_0.5)Bi₄Ti₅O₁₈ piezoelectric ceramics

Realizing Enhanced Electrical Properties of CaBi₂Nb₂O₉-Based High-Temperature Piezoceramics by Constructing a Pseudophase Boundary