Characteristics and dielectric properties of (Pb0.97−La0.02Ba )(Zr0.72Sn0.22Ti0.06)O3 ceramics

Wang, Jinfei; Yang, Tongqing; Chen, Shengchen; Li, Gang; Yao, Xi

doi:10.1016/j.jallcom.2012.06.028

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…Nevertheless, for PLBZST, the disappearance of the (002) peak manifests that it is a cubic perovskite. With Ba doping, the crystal lattice transformed from tetragonal to cubic, which is consistent with previous studies 30,31.…”

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confidence: 92%

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Frequency dependence of antiferroelectricferroelectric phase transition of PLZST ceramic

et al. 2021

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Antiferroelectric (AFE) ceramics are promising for applications in high-power density capacitors, transducers, etc. The forward switching field (𝐸 AFE−FE ) and backward switching field (𝐸 FE−AFE ) are critical performance indicators for AFE ceramics, and the coupling between the structure transition and domain orientation makes them different from the coercive field (𝐸 C ) of ferroelectric (FE). Moreover, in practical applications, AFE ceramics are often required to operate at varying frequencies. However, systematic studies regarding the frequency dependence of 𝐸 AFE−FE and 𝐸 FE−AFE are insufficient. In this work, Pb 0.98 La 0.02 [(Zr 0.55 Sn 0.45 ) 0.88 Ti 0.12 ] 0.995 O 3 (PLZST) AFE ceramic was fabricated, and two empirical formulas (𝐸 AFE−FE = 𝐴+𝐾 𝐴 × 𝑓 𝛽 , 𝐸 FE−AFE = 𝐹−𝐾 𝐹 × 𝑓 𝛽 ) were proposed to predict the frequency dependence of 𝐸 AFE−FE and 𝐸 FE−AFE .The formulas are based on the electric field-induced phase transition characteristics of AFE and the Kolmogorov-Avrami-Ishibashi domain nucleationswitching model. Furthermore, the dynamic hysteresis loops of PLZST at various frequencies (1-1000 Hz) and temperatures (30-230 • C) were investigated. The results show that the electric field-induced phase transition of AFE ceramic is dominated by the coupling between the structural transition and domain orientation. The domain orientation hinders the structure transition, leading to an increase in 𝐸 AFE−FE and a decrease in 𝐸 FE−AFE as the frequency of applied electric field increases. Meanwhile, the domain growth process is affected by the structure of AFE, and the value of 𝛽 (domain growth dimensionality) increases with the stability of the AFE structure. For comparison, Pb 0.86 La 0.02 Ba 0.12 [(Zr 0.55 Sn 0.45 ) 0.88 Ti 0.12 ] 0.995 O 3 (PLBZST) relaxor FE ceramic was fabricated. Due to the high mobility of the microdomain, the dynamic hysteresis loop of PLBZST ceramic exhibits excellent frequency stability. The charge-discharge experiment with an ultrahigh equivalent frequency (𝑓 equivalent >100 kHz) was performed to investigate the frequency stability of energy release of PLZST and PLBZST. The results may provide guidance for research pertaining to ceramic capacitors with high-power density and highfrequency stability.

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supporting

confidence: 92%

“…With Ba doping, the crystal lattice transformed from tetragonal to cubic, which is consistent with previous studies. 30,31 Figure 2 shows the dense and uniform SEM surface images of the PLZST and PLBZST ceramics. The grain size distribution was measured by Nano measurement software.…”

Section: Methodsmentioning

confidence: 99%

Frequency dependence of antiferroelectricferroelectric phase transition of PLZST ceramic

et al. 2021

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“…Alternatively, ∆T can be measured or simulated directly. 22,[34][35][36][37][38][39][40][41] So far, direct temperature changes have been mainly determined for a unipolar field loading (field application or removal for one field direction) and the possible impacts of thermal and field hysteresis have been widely neglected. However, simulations 42 and direct measurements 43,44 revealed the impact of thermal hysteresis and field protocol on the ECE close to phase transitions.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Electrocaloric Effect by Internal Bias Fields and Field Protocols

Albe

et al. 2018

Phys. Rev. Applied

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In acceptor doped ferroelectrics and in ferroelectric films and nanocomposites, defect dipoles, strain gradients, and the electric boundary conditions at interfaces and surfaces often impose internal bias fields. In this work we delicately study the impact of internal bias fields on the electrocaloric effect (ECE), utilizing an analytical model and ab initio-based molecular dynamics simulations. We reveal the complex dependency of the ECE on field protocol and relative strength of internal and external fields. The internal fields may even reverse the sign of the response (inverse or negative ECE). We explore the transition between conventional and inverse ECE and discuss reversible and irreversible contributions to the field-induced specific entropy change. Most importantly, we predict design routes to optimize the cooling and heating response for small external fields by the combination of internal field strengths and the field loading protocol. arXiv:1805.04380v2 [cond-mat.mtrl-sci] 14 May 2018 P end Pinit EdP , with P init and P end the initial and final polarization, respectively. For positive E, the work is thus positive if |P | increases, while negative if |P | decreases, and vice versa for negative E. Outside the hysteretic region (e.g. between A and B or E and

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Achieving high energy storage density of PLZS antiferroelectric within a wide range of components

Liu

Yang

et al. 2021

J Mater Sci

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Characteristics and dielectric properties of (Pb0.97−La0.02Ba )(Zr0.72Sn0.22Ti0.06)O3 ceramics

Cited by 13 publications

References 20 publications

Frequency dependence of antiferroelectricferroelectric phase transition of PLZST ceramic

Frequency dependence of antiferroelectricferroelectric phase transition of PLZST ceramic

Tailoring the Electrocaloric Effect by Internal Bias Fields and Field Protocols

Achieving high energy storage density of PLZS antiferroelectric within a wide range of components

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