Temperature dependence of the dielectric and piezoelectric properties of xBiFeO3–(1 − x)BaTiO3 ceramics near the morphotropic phase boundary

Wei, Jianxin; Fu, Dongyan; Cheng, Jinrong

doi:10.1007/s10853-017-1280-6

Cited by 44 publications

(23 citation statements)

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“…4 Its solid solutions with other ABO 3 -type perovskite end-members have recently been of great interest amongst ferro-piezoelectric polar dielectric materials, particularly after the issues associated with inherent high leakage current 4 and phase decomposition 5 were addressed successfully via doping [6][7][8] and synthesis strategies. 9 Particular attention can be drawn to BiFeO 3 -BaTiO 3 (BF-BT) solid solutions, which have been intensively studied as promising candidates for high temperature piezoceramic applications, 8,10,11 surpassing the temperature capability of typical lead-based ferroelectrics. To date, the highest d 33 in xBF-BT ceramics was reported as 402 pC N À1 , with a small amount of BiGaO 3 being incorporated in the composition with x = 0.67; these ceramics were prepared by water-quenching and were assumed to have an MPB composition, with coexistence of rhombohedral and tetragonal phases.…”

Section: Introductionmentioning

confidence: 99%

Quenching-assisted actuation mechanisms in core–shell structured BiFeO₃–BaTiO₃ piezoceramics

et al. 2019

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Electromechanical actuation in piezoceramics is usually enhanced by creating chemically homogeneous materials with structurally heterogeneous morphotropic phase boundaries, leading to abrupt changes in ion displacement directions within the perovskite unit cell. In the present study, an alternative mechanism to enhance electromechanical coupling is found in both chemically and structurally heterogeneous BiFeO 3 -BaTiO 3 lead-free piezoceramics. Such a mechanism is observed in a composition exhibiting core-shell type microstructure, associated with donor-type substitution of Ti 4+ for Fe 3+ , and is primarily activated by thermal quenching treatment. Here, we describe the use of in situ highenergy synchrotron X-ray powder diffraction upon the application of a high electric field to directly monitor the ferroelectric and elastic interactions between these composite-like components, formed as core and shell regions within grains. Translational short or long-range ordering is observed in the BiFeO 3 -depleted shell regions which undergo significant structural alterations from pseudocubic Pm % 3mrelaxor-ferroelectric in slow-cooled ceramics to rhombohedral R3c or R3m with long-range ferroelectric order in the quenched state. The strain contributions from each component are calculated, leading to the conclusion that the total macroscopic strain arises predominantly from the transformed shell after quenching. Such observations are also complemented by investigations of microstructure and electrical properties, including ferroelectric behaviour and temperature-dependent dielectric properties.

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Section: Introductionmentioning

confidence: 99%

Quenching-assisted actuation mechanisms in core–shell structured BiFeO₃–BaTiO₃ piezoceramics

et al. 2019

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“…Therefore, the oxygen vacancies induced by the imbalance of the ion valence favor the transfer of mass and energy, leading to larger grain sizes. It has also been reported that Mn‐doping promotes grain growth and changes the domain configuration significantly …”

Section: Resultsmentioning

confidence: 97%

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

Zhang

Zhu

et al. 2018

J Am Ceram Soc

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Energy storage capacitors with high recoverable energy density and efficiency are greatly desired in pulse power system. In this study, the energy density and efficiency were enhanced in Mn‐modified (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3 antiferroelectric ceramics via a conventional solid‐state reaction process. The improvement was attributed to the change in the antiferroelectric‐to‐ferroelectric phase transition electric field (EF) and the ferroelectric‐to‐antiferroelectric phase transition electric field (EA) with a small Mn addition. Mn ions as acceptors, which gave rise to the structure variation, significantly influenced the microstructures, dielectric properties and energy storage performance of the antiferroelectric ceramics. A maximum recoverable energy density of 2.64 J/cm3 with an efficiency of 73% was achieved when x = 0.005, which was 40% higher than that (1.84 J/cm3, 68%) of the pure ceramic counterparts. The results demonstrate that the acceptor modification is an effective way to improve the energy storage density and efficiency of antiferroelectric ceramics by inducing a structure variation and the (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3‐xMn2O3 antiferroelectric ceramics are a promising energy storage material with high‐power density.

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“…The dielectric, piezoelectric, and ferroelectric properties of BF-BT ceramics are listed in Table 2, which are similar to the reported values of the chemical modified BF-BT ceramics. [12][13][14][15][16][17][18][19][20][21] Both the Curie temperature and coercive field of BF-BT ceramics are very sensitive to the BF content, where the maximal values are found to be 635°C and 48 kV/cm for composition with BF content of x = 0.75, respectively, much larger than those of extensively studied PZT and BS-PT based ceramics. The BF exhibits R3c symmetry, whereas PZ and BS are R3m symmetry.…”

Section: Structure Dielectric Ferroelectric and Piezoelectric Prmentioning

confidence: 99%

“…[6][7][8] Chemical modifications (Co, Zr, Al, Ga, Mg 1/2 Ti 1/2 , Ni 1/2 Ti 1/2 , and Zn 1/2 Ti 1/2 ) and quenching treatment are also performed on BF-BT solid solution, with improved piezoelectric properties up to 120-200 pC/N for the compositions with R-PC boundary. [12][13][14][15][16][17][18][19][20][21] Recently, Lee et al reported a high piezoelectric coefficient of 402 pC/N at the MPB (Coexistence of Rhombohedral and Tetragonal phases) compositions of Ga-doped BiFeO 3 -BaTiO 3 ceramics with water-quenched treatment. 2 In ferroelectric materials, the domain forms when they transform from paraelectric to ferroelectric phase at Curie temperature, which is the region with the same polarization orientation.…”

mentioning

confidence: 99%

“…The average grain size of BF-BT ceramics with the composition of x = 0.64, 0.70, and 0.75 are 5.6, 6.8, and 3.9 μm, respectively, and their relative densities are about 95%. 17 High resolution synchrotron X-ray powder diffractions (SXRD) were performed at the Powder Diffraction Beamline located at the Australian Synchrotron. The crushed powder from the sintered ceramics was annealed above their Curie temperature to remove the possible residual stress.…”

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confidence: 99%

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Excellent thermal stability and aging behaviors in BiFeO₃‐BaTiO₃ piezoelectric ceramics with rhombohedral phase

et al. 2019

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BiFeO3‐BaTiO3 (BF‐BT) solid solutions are lead‐free candidates for high‐temperature piezoelectric applications. BF‐BT ceramics with compositions near the morphotropic phase boundary (MPB) separating rhombohedral (R) and pseudo‐cubic (PC) phases were fabricated by the conventional high temperature sintering method, and their thermal stability and aging properties were studied in detail. BF‐BT ceramics with rhombohedral (R) phase show much better thermal stability and aging properties than those with pseudo‐cubic (PC) or coexistence of PC and R phases. The thermal degradation and aging rates of BF‐BT ceramics with R phase are on the order of 1% and 1.2% per decade, respectively. X‐ray diffraction results reveal that the domain state of poled rhombohedral BF‐BT ceramics is stable up to its Curie temperature, which is responsible for the high thermal stability. The Rayleigh analysis shows that the low aging rate is attributed to the low domain wall contribution to the overall piezoelectric response. The high thermal stability and low aging rates indicate that the lead‐free BF‐BT ceramics with R phase are potential candidates for sensor and transducer applications over a broad temperature range.

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Temperature dependence of the dielectric and piezoelectric properties of xBiFeO3–(1 − x)BaTiO3 ceramics near the morphotropic phase boundary

Cited by 44 publications

References 44 publications

Quenching-assisted actuation mechanisms in core–shell structured BiFeO₃–BaTiO₃ piezoceramics

Quenching-assisted actuation mechanisms in core–shell structured BiFeO₃–BaTiO₃ piezoceramics

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

Excellent thermal stability and aging behaviors in BiFeO₃‐BaTiO₃ piezoelectric ceramics with rhombohedral phase

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Temperature dependence of the dielectric and piezoelectric properties of xBiFeO3–(1 − x)BaTiO3 ceramics near the morphotropic phase boundary

Cited by 44 publications

References 44 publications

Quenching-assisted actuation mechanisms in core–shell structured BiFeO3–BaTiO3 piezoceramics

Quenching-assisted actuation mechanisms in core–shell structured BiFeO3–BaTiO3 piezoceramics

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

Excellent thermal stability and aging behaviors in BiFeO3‐BaTiO3 piezoelectric ceramics with rhombohedral phase

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Product

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Quenching-assisted actuation mechanisms in core–shell structured BiFeO₃–BaTiO₃ piezoceramics

Quenching-assisted actuation mechanisms in core–shell structured BiFeO₃–BaTiO₃ piezoceramics

Excellent thermal stability and aging behaviors in BiFeO₃‐BaTiO₃ piezoelectric ceramics with rhombohedral phase