Lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 piezoelectric ceramics processed below 1300°C

Reyes-Montero, Armando; Pardo, L.; López-Juárez, Rigoberto; González, Alvaro de Guzmán Fernández; Cruz, M. P.; Villafuerte-Castrejón, M.E.

doi:10.1016/j.jallcom.2013.08.165

Cited by 44 publications

(20 citation statements)

References 25 publications

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“…The poled ceramic shows a bulk d 33 around 232 pC/N. This value is comparable with the bulk d 33 obtained by A. Reyes et al 6 and K. Castkova et al 41 . The local piezo-response and the macroscopic ferroelectric behavior observed in this sample is in agreement with the global tetragonal structure formed, as it can be observed in the XRD 2D-GIXRD and Raman sections.…”

Section: Panel (A) Insupporting

confidence: 88%

“…01-073-5502. A. Reyes-Montero et al 6 suggests that the lower sintering temperature in this electro-ceramic could present a small amount of secondary phase that is undetectable by conventional XRD experiments. On the other hand, a broadening of 200 plane was observed respect to the sharper 111 plane suggesting the presence of a structural doublet, which could be associated to the tetragonal phase supporting our XRD and Raman interpretation.…”

Section: Methodsmentioning

confidence: 90%

“…For the Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 O 3 composition (denoted in this work as BCZT), earlier reports suggest a single perovskite crystal structure with tetragonal phase (P4mm space group, No. 99) 6,7 . In fact, similar compositions that fall in the tricritical point (also called the morphotropic phase boundary) show a strong influence of the tetragonal phase 8,9 .…”

Section: Introductionmentioning

confidence: 99%

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Local piezo-response for lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 electro-ceramic by switching spectroscopy

et al. 2018

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The purpose of this work is to determine the effective piezoelectric coefficient (d 33 ) and the macro ferroelectric hysteresis behavior for the Ba 0.9 Ca 0.1 Ti 0.9 Zr 0.1 O 3 (BCZT). The sample was prepared by the modified Pechini method and it was sintered at 1250 ºC for 5 h. The refinements of X-ray diffraction (XRD) patterns obtained by the Rietveld method suggest a slight degree of tetragonality (c/a = 1.0025) in the perovskite structure. High counting statistics was performed in the two-dimensional grazing incidence 2D-GIXRD characterization by using synchrotron radiation. These results and the Raman spectrum analysis support the XRD interpretation. The morphology reveals a non-homogeneous terrace-type shape with a grain size distribution centered at 13 microns. The switching spectroscopy piezo-response force microscopy was used to obtained the effective d 33 = 142 pm/V. The soft ferroelectric hysteresis shows a coercive field H c = 1.3 kV/cm with a saturation polarization P s = 15.7 µC/cm 2 .

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Section: Panel (A) Insupporting

confidence: 88%

Section: Methodsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Local piezo-response for lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 electro-ceramic by switching spectroscopy

et al. 2018

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“…For example, all these ceramics sintered at 1400-1560°C show a soft anomaly in the permittivity curve at about 40°C which could correspond to phase transition T R-T . This ions incorporation into the perovskite lattice as the sintering temperature increases [33]. For the ceramic sintered at 1480°C, both of T R-T and T C reach a lowest value of 35 and 85°C, respectively, confirming the involvement of a more noticeable phase transition near room temperature due to the strengthened long-range ferroelectric interactions [24].…”

Section: Resultsmentioning

confidence: 79%

Correlation of grain size, phase transition and piezoelectric properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

Sun

Zheng

Wan

et al. 2015

J Mater Sci: Mater Electron

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Pb-free ceramics Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 inspired by the excellent piezoelectricity of morphotropic phase boundary deriving from a tricritical point have been prepared by a solid state reaction route and the effects of grain size and room-temperature phases of the ceramics have been studied in detail. When sintering temperature rises from 1320 to 1560°C with controlling the dwell time for 2 h, the ceramic sintered at 1480°C possesses the optimum piezoelectricity. We choose 1360 and 1480°C as two distinctive sintering temperatures to further study the effect of dwell time on the electrical properties of the ceramics. The results show that the improved piezoelectric behavior (d 33 * 416 pC/N and k p * 55.8 %) is demonstrated for the Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 ceramic at an optimal sintering temperature of 1480°C and dwell time of 2 h, which is attributed to the largest grain size together with more noticeable rhombohedral-tetragonal phase transition near room-temperature.

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“…The coalescence of two ferroelectric phases lowers down the energy barrier between them, facilitating the rotation grade of the polarization vector [1]. For this reason, several researchers have focused their attention on modifying the chemical composition [2][3][4][5] or synthesis conditions [6][7][8] for maximizing their electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Impedance Analysis on the Electrical Response of Lead-Free Ba1−xCaxTi0.9Zr0.1O3 Ceramics at High Temperature Range

et al. 2017

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Ba 1−x Ca x Ti 0.9 Zr 0.1 O 3 (x = 0.10, 0.15, 0.18) solid solutions were synthesized by the conventional solid-state method. A perovskite-type structure was determined using the X-ray diffraction (XRD) technique. The addition of Ca 2+ reduced the grain size (22.6, 17.9 and 13.3 µm, respectively) for all well-sintered ceramics (≈98%). Moreover, the stability temperature ranges for the tetragonal phase were promoted by displacing the ferroelectric-ferroelectric phase's transition temperatures while T C was maintained (86 • C). The electrical performance of the material improved as the stoichiometric composition was positioned near the morphotropic phase boundary (x = 0.15): ε r ≈ 16,500 (T C ) at 1 kHz. For T > T C , a thermally activated relaxation process occurred. In addition, the bulk and grain boundary processes were responsible for the conduction mechanisms. The composition x = 0.15 showed an activation energy of Ea = 1.49 eV with a maximum conductivity of σ max = 2.48 × 10 −2 S·cm −1 at 580 • C. Systematic studies at high temperature for dielectric properties were accomplished for analyzing electrical inhomogeneities associated with the grain, grain boundaries or surfaces, which are important for device design and a fundamental electrical characterization.

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Lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 piezoelectric ceramics processed below 1300°C

Cited by 44 publications

References 25 publications

Local piezo-response for lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 electro-ceramic by switching spectroscopy

Local piezo-response for lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 electro-ceramic by switching spectroscopy

Correlation of grain size, phase transition and piezoelectric properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

Dielectric and Impedance Analysis on the Electrical Response of Lead-Free Ba1−xCaxTi0.9Zr0.1O3 Ceramics at High Temperature Range

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