Effect of poling process on piezoelectric properties of sol–gel derived BZT–BCT ceramics

Praveen, J. Paul; Karthik, T.; James, A. R.; Chandrakala, E.; Asthana, Saket; Das, Dibakar

doi:10.1016/j.jeurceramsoc.2014.12.010

Cited by 160 publications

(89 citation statements)

References 33 publications

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“…The material was shown to be quite 'soft' with respect to the electric field (easy paths for polarization rotation in anisotropically flattened free energy profile) and, even more importantly, with respect to the crystal lattice (large electrostrain obtained under small electric field) [47,48]. These two effects go hand in hand leading to high piezoactivity due to faster domain wall motion under external stresses.…”

Section: Ferroelectric and Piezoelectric Propertiesmentioning

confidence: 99%

Structure–microstructure–property relationships in lead-free BCTZ piezoceramics processed by conventional sintering and spark plasma sintering

Benabdallah

Elissalde

Chung

et al. 2015

Journal of the European Ceramic Society

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a b s t r a c tLead-free piezoelectric ceramics belonging to the pseudo-binary system (1 − x)BaTi 0.8 Zr 0.2 O 3 -x Ba 0.7 Ca 0.3 TiO 3 (BCTZ, x = 0.32 and 0.5) were prepared using conventional sintering and spark plasma sintering. This comparative study shows how the macroscopic properties of ferroelectric BCTZ perovskites are affected when the grain size is decreased. The crystallographic structure and the microstructural characteristics are thoroughly investigated for ceramic samples obtained by both sintering methods. We clearly demonstrate that the dielectric, piezoelectric, pyroelectric and ferroelectric properties in SPS ceramics are strongly affected by the grain size and the structural defects leading to local strain fields which undermine the polarisation flexibility. This confirms that the critical compositions showing remarkably large piezoelectric coefficients are extremely sensitive to external and internal stresses.

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Section: Ferroelectric and Piezoelectric Propertiesmentioning

confidence: 99%

Structure–microstructure–property relationships in lead-free BCTZ piezoceramics processed by conventional sintering and spark plasma sintering

Benabdallah

Elissalde

Chung

et al. 2015

Journal of the European Ceramic Society

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“…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 . The literature 10,11 suggested that electro-ceramics with similar compositions could exhibit high electrical response when were achieved other physical and microstructural parameters, such as high density (above 96%) and grain size above 15 microns.…”

Section: Introductionmentioning

confidence: 99%

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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“…P-E plot displays a normal ferroelectric hysteresis loop akin to such system. 45 The values of remanent polarization P r and coercive field E c are observed to be 0:35 C/cm 2 and 0.77 kV/cm. The strain-field plot exhibits very fine butterfly-shaped strain hysteresis loop, a distinct feature of ferroelectric materials.…”

Section: Resultsmentioning

confidence: 88%

On the high temperature phase transition in Ba(Zr0.20Ti0.80)O₃ceramic

2017

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Temperature dependent X-ray diffraction (XRD) and dielectric properties of perovskite Ba(Zr 0:2 Ti 0:8 ÞO 3 ceramic prepared using a standard solid-state reaction process is presented. Along with phase transitions at low temperature, a new phase transition at high temperature (873 C at 20 Hz), diffusive in character has been found where the lattice structure changes from monoclinic (space group: P2=mÞ to hexagonal (space group: P6=mmm). This result places present ceramic in the list of potential candidate for intended high temperature applications. The AC conductivity data followed hopping type charge conduction and supports jump relaxation model. The experimental value of d 33 ¼ 98 pC/N was found. The dependence of polarization and strain on electric field at room temperature suggested that lead-free Ba(Zr 0:2 Ti 0:8 ÞO 3 is a promising material for electrostrictive applications.

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Effect of poling process on piezoelectric properties of sol–gel derived BZT–BCT ceramics

Cited by 160 publications

References 33 publications

Structure–microstructure–property relationships in lead-free BCTZ piezoceramics processed by conventional sintering and spark plasma sintering

Structure–microstructure–property relationships in lead-free BCTZ piezoceramics processed by conventional sintering and spark plasma sintering

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

On the high temperature phase transition in Ba(Zr0.20Ti0.80)O₃ceramic

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Effect of poling process on piezoelectric properties of sol–gel derived BZT–BCT ceramics

Cited by 160 publications

References 33 publications

Structure–microstructure–property relationships in lead-free BCTZ piezoceramics processed by conventional sintering and spark plasma sintering

Structure–microstructure–property relationships in lead-free BCTZ piezoceramics processed by conventional sintering and spark plasma sintering

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

On the high temperature phase transition in Ba(Zr0.20Ti0.80)O3ceramic

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On the high temperature phase transition in Ba(Zr0.20Ti0.80)O₃ceramic