2013
DOI: 10.1063/1.4837616
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Investigation of low field dielectric properties of anisotropic porous Pb(Zr,Ti)O3 ceramics: Experiment and modeling

Abstract: Articles you may be interested inUsing multi-walled carbon nanotubes in spark plasma sintered Pb(Zr0.47Ti0.53)O3 ceramics for tailoring dielectric and tunability properties

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Cited by 21 publications
(12 citation statements)
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“…1). Since the reducing of both porosity [29] and ceramic grain size normally causes a reduction of material constants as result of a "dilution" effect [30], it means that much higher permittivity values can still be achieved around this composition, by optimising the sintering strategy for a better densification. In the present work, we preferred to maintain the same sintering parameters for all the compositions, in order to describe the role of La 3þ addition only.…”
Section: Resultsmentioning
confidence: 99%
“…1). Since the reducing of both porosity [29] and ceramic grain size normally causes a reduction of material constants as result of a "dilution" effect [30], it means that much higher permittivity values can still be achieved around this composition, by optimising the sintering strategy for a better densification. In the present work, we preferred to maintain the same sintering parameters for all the compositions, in order to describe the role of La 3þ addition only.…”
Section: Resultsmentioning
confidence: 99%
“…2c and d) cannot be described by analytical formulas and for this reason, 3D Finite Element Method (FEM) has been employed. In the FEM procedures the Laplace equation (r Á ðerVÞ ¼ 0, where e is the local permittivity and V is the local potential) is solved, taking into account the boundary conditions in a parallel-plate capacitor: Dirichlet boundary conditions on the top and bottom surfaces and Neumann boundary conditions at lateral surfaces, as described in detail elsewhere [46,47]. After computing the local potentials and the local electric fields, the average electric displacement and the average electric field were estimated and the effective permittivity was derived from Eq.…”
Section: Description Of Permittivity By Finite Element Model and Effementioning
confidence: 99%
“…We checked that BST alone processed using the same route did not show any such anisotropy. While piezoelectric ceramics with graded porosity have already been reported to show dielectric anisotropy, 11,12 to the best of our knowledge no ferroelectric anisotropy has been reported. In addition, we propose to link our experimental parameters at low electric field to the 3D morphological anisotropy of the individual MgO inclusions and to the sharp inclusion edges facing each other.…”
Section: Introductionmentioning
confidence: 94%
“…This feature was not observed in ceramics that included void inclusions of anisotropic shape. 11,12 Another probe for ferroelectric anisotropy is the piezoelectric resonance that is less sensitive to all spurious free charges that could always be accumulated at the ferroelectric/dielectric interfaces and that could contribute to the depolarization currents. For the piezoelectric experiments, the parallel sample was a bar 5.59 × 1.48 × 0.82 mm 3 and the perpendicular sample a Plate 2.28 × 1.33 × 0.53 mm 3 .…”
Section: Dielectric and Ferroelectric Anisotropymentioning
confidence: 99%
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