Local structure and evolution of relaxor behavior in BaTiO3–Bi(Zn0.5Ti0.5)O3 ceramics

Bootchanont, Atipong; Triamnak, Narit; Rujirawat, Saroj; Yimnirun, Rattikorn; Cann, David P.; Guo, Ruyan; Bhalla, A. S.

doi:10.1016/j.ceramint.2014.06.067

Cited by 33 publications

(9 citation statements)

References 15 publications

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“…At even higher levels of substitution, the solid solution becomes a relaxor with a characteristic frequency‐dispersion at the dielectric maxima [Fig. (c)], and follows the Vogel‐Fulcher law in general:

f = f_{0} exp (\frac{E_{normala}}{k ()(T_{truemax} - T_{normalf})})

where f is the measurement frequency, f 0 is a fitting parameter, k is the Boltzmann constant, and

E_{a}

is activation energy. In BaTiO 3 –Bi(Zn 1/2 Ti 1/2 )O 3 (BT–BZT) ceramics, for example, this crossover from normal ferroelectric to relaxor takes place around 8 mol% BZT.…”

Section: Introductionmentioning

confidence: 99%

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Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

et al. 2016

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As part of a continued push for high permittivity dielectrics suitable for use at elevated operating temperatures and/or large electric fields, modifications of BaTiO3 with Bi(M)O3, where M represents a net‐trivalent B‐site occupied by one or more species, have received a great deal of recent attention. Materials in this composition family exhibit weakly coupled relaxor behavior that is not only remarkably stable at high temperatures and under large electric fields, but is also quite similar across various identities of M. Moderate levels of Bi content (as much as 50 mol%) appear to be crucial to the stability of the dielectric response. In addition, the presence of significant Bi reduces the processing temperatures required for densification and increases the required oxygen content in processing atmospheres relative to traditional X7R‐type BaTiO3‐based dielectrics. Although detailed understanding of the structure–processing–property relationships in this class of materials is still in its infancy, this article reviews the current state of understanding of the mechanisms underlying the high and stable values of both relative permittivity and resistivity that are characteristic of BaTiO3‐Bi(M)O3 dielectrics as well as the processing challenges and opportunities associated with these materials.

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f = f_{0} exp (\frac{E_{normala}}{k ()(T_{truemax} - T_{normalf})})

where f is the measurement frequency, f 0 is a fitting parameter, k is the Boltzmann constant, and

E_{a}

is activation energy. In BaTiO 3 –Bi(Zn 1/2 Ti 1/2 )O 3 (BT–BZT) ceramics, for example, this crossover from normal ferroelectric to relaxor takes place around 8 mol% BZT.…”

Section: Introductionmentioning

confidence: 99%

“…At even higher levels of substitution, the solid solution becomes a relaxor with a characteristic frequency-dispersion at the dielectric maxima [ Fig. 1(c)], and follows the Vogel-Fulcher law 22,23 in general:…”

Section: Introductionmentioning

confidence: 99%

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

et al. 2016

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“…Various theories have been proposed to explain the diffuse phase transition behavior in perovskite, which are based on cation disorder, corresponds to the fluctuations in the compositions of presence of polar nanoregions (PNRs) where different kind of cations B′ and B″ occupy the same crystallographic B‐site in the ABO 3 ‐type perovskite structure. Thus, the diffuse phase transition behavior in BSZT ceramics might be due to the composition heterogeneity at the microscopic level . Figure presents the observed variation in the tan δ with temperature at frequency from 1 kHz‐1 MHz.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the diffuse phase transition behavior in BSZT ceramics might be due to the composition heterogeneity at the microscopic level. [18][19][20] Figure 5 presents the observed variation in the tan d with temperature at frequency from 1 kHz-1 MHz. All the compositions exhibited a frequency dispersion which was high at low frequencies which indicated its association with the presence of PNRs in the ceramic samples.…”

Section: Resultsmentioning

confidence: 99%

Dielectric and ferroelectric properties of the sol‐gel–derived Zr‐doped Ba_0.7Sr_0.3TiO₃ polycrystalline ceramic systems

Mahmood

Akhtar

Iqbal

et al. 2017

Int J Applied Ceramic Tech

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Ba0.7Sr0.3ZrxTi1−xO3 (BSZT; where x=0.02, 0.04, 0.06, 0.08, 0.1) ceramics were processed through a sol‐gel method at 1450°C for 6 h. All the samples showed a diffuse phase transition which might be due to the presence of polar nanoregions, those associated with the composition inhomogeneity in the BSZT ceramics. The sample with x=0.02 exhibited a dielectric constant (ɛ=23714) which successively decreased with increasing x up to 8569 for the sample with x=0.1 around Tc measured at 10 kHz. Ceramic samples showed a ferroelectric hysteresis behavior similar to relaxor materials.

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“…In BZT‐PT ceramics, the ferroelectric properties and the tetragonality of PT are systematically enhanced with the addition of BZT . In BZT‐BT solid solutions the ferroelectric properties was not enhanced by introducing BZT; they show distinct relaxor behaviors with strong frequency dispersion . In our previous work , the BZT‐BT solid solutions show a ferroeletric‐relaxor transition with increasing BZT.…”

Section: Introductionmentioning

confidence: 85%

Abnormal polar nanoregion evolution in (Bi_0.09Ba_0.91)(Zn_0.045Ti_0.955)O₃ (9BZT‐BT) ceramic

Shi

Cui

Wang

et al. 2017

Physica Status Solidi (b)

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In this work, 9BZT‐BT ceramic has been studied by both experiment and theoretical ab initio molecular dynamics. In experiment, there are two sets of polar regions with different decay temperatures coexisting in the sample. With increasing temperature, one set gradually decomposes between −45 and −15 °C, whereas the other set keeps stable until much higher temperatures. Ab initio molecular dynamics simulations show that Bi3+−Zn2+ displacement coupling plays a crucial role at high temperatures to stabilize the micro‐domains and ergodic state polar nanoregions (PNRs). This mechanism could be used to explain the complex polarization behaviors and strong relaxor phenomenon observed in experiment.

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Local structure and evolution of relaxor behavior in BaTiO3–Bi(Zn0.5Ti0.5)O3 ceramics

Cited by 33 publications

References 15 publications

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

Dielectric and ferroelectric properties of the sol‐gel–derived Zr‐doped Ba_0.7Sr_0.3TiO₃ polycrystalline ceramic systems

Abnormal polar nanoregion evolution in (Bi_0.09Ba_0.91)(Zn_0.045Ti_0.955)O₃ (9BZT‐BT) ceramic

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Local structure and evolution of relaxor behavior in BaTiO3–Bi(Zn0.5Ti0.5)O3 ceramics

Cited by 33 publications

References 15 publications

Current Understanding of Structure–Processing–Property Relationships in BaTiO3–Bi(M)O3 Dielectrics

Current Understanding of Structure–Processing–Property Relationships in BaTiO3–Bi(M)O3 Dielectrics

Dielectric and ferroelectric properties of the sol‐gel–derived Zr‐doped Ba0.7Sr0.3TiO3 polycrystalline ceramic systems

Abnormal polar nanoregion evolution in (Bi0.09Ba0.91)(Zn0.045Ti0.955)O3 (9BZT‐BT) ceramic

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Product

Resources

About

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

Dielectric and ferroelectric properties of the sol‐gel–derived Zr‐doped Ba_0.7Sr_0.3TiO₃ polycrystalline ceramic systems

Abnormal polar nanoregion evolution in (Bi_0.09Ba_0.91)(Zn_0.045Ti_0.955)O₃ (9BZT‐BT) ceramic