Dielectric and piezoelectric properties of PZT ceramics doped with strontium and lanthanum

Kalem, Volkan; Çam, İbrahim; Timuçin, Muharrem

doi:10.1016/j.ceramint.2010.12.003

Cited by 81 publications

(28 citation statements)

References 31 publications

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“…% La caused a doubling of the measured d 33 from 305 to 640 pC/N and an increase in the free dielectric constant from 1138 to 1800. 22 In a different study, modification of PZT with concentrations of !1 at. % La led to a decrease in the T c as well as a reduced c/a ratio.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures

Aksel

Forrester

Foronda

et al. 2012

Journal of Applied Physics

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The magnetic phase diagram and large reversible room-temperature magnetocaloric effect in antiperovskite compounds Zn1−xSnxCFe3 (0≤x≤1) J. Appl. Phys. 112, 063904 (2012) Convergent beam electron-diffraction investigation of lattice mismatch and static disorder in GaAs/GaAs1−xNx intercalated GaAs/GaAs1−xNx:H heterostructures Appl. Phys. Lett. 101, 111912 (2012) The role of structural properties on deep defect states in Cu2ZnSnS4 studied by photoluminescence spectroscopy Appl. Phys. Lett. 101, 102102 (2012) Electronic, structural, and elastic properties of metal nitrides XN (X = Sc, Y): A first principle study AIP Advances 2, 032163 (2012) Magnetic tri-axial grain alignment in misfit-layered bismuth-based cobaltitesThe crystal structure and property changes of sodium bismuth titanate (Na 0.5 Bi 0.5 TiO 3 , NBT) piezoelectric ceramics are reported as a function of La modification (0.5-2.0 at. %) and increasing temperature using high resolution x-ray diffraction, permittivity, depolarization, and polarization and strain hysteresis measurements. La substitution is found to decrease the depolarization temperature of NBT (e.g., 1.5 at. % La substitution lowers the depolarization temperature by 60 C relative to the unmodified composition) with little impact on the room temperature polarization and strain hysteresis. The room temperature structures of the various NBT compositions were modeled using a mixture of the monoclinic Cc space group and the cubic Pm 3m phase, where the Pm 3m phase is used to model local regions in the material which do not obey the long range Cc space group. With increasing La substitution, the lattice parameter distortions associated with the Cc phase approached that of the prototypical cubic unit cell and the fraction of the Pm 3m phase increased. The relationship between these crystallographic changes and the depolarization behavior of La-modified NBT is discussed.

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Section: Introductionmentioning

confidence: 99%

Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures

Aksel

Forrester

Foronda

et al. 2012

Journal of Applied Physics

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“…In general, La 3+ and Nd 3+ ions replace Pb 2+ ions from "A" site and extra positive charges creates lattice vacancy to maintain electrical neutrality [6]. These Pb vacancies facilitate domain wall movement by application of an electric field [20,21]. It was also observed that d 33 increases with the increase in Nd 3+ concentration up to 0.02 mol and then decreases.…”

Section: Piezoelectric Propertiesmentioning

confidence: 58%

Effect of lanthanum, neodymium on piezoelectric, dielectric and ferroelectric properties of PZT

Sahoo

Panda

2013

J Adv Ceram

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Abstract:The effect of La 3+ and Nd 3+ on piezoelectric, dielectric and ferroelectric properties of PZT (Pb(Zr 0.53 Ti 0.47 )O 3 ) was studied. The powders were prepared by "wet-chemical" route followed by calcination at 800 ℃ for 4 h. XRD analysis of the calcined powders confirms the tetragonal phase in the undoped PZT, which gradually decreases with the dopant concentration and the appearance of rhombohedral phase simultaneously. SEM study of sintered pellets reveals the decrease in grain size with the increase in dopant concentration beyond 0.02 mol Nd 3+ and 0.03 mol La 3+ respectively. The piezoelectric constant (d 33 ) and dielectric properties were maximum for 0.02 mol Nd 3+ and 0.03 mol La 3+ respectively. The remnant polarization of La 3+ -doped sample was higher than Nd 3+ -doped sample, and the sample with combined dopants shows intermediate remnant polarization (P r ). Based on the above study, it is concluded that La 3+ is more effective than Nd 3+ , including in a mixture of La 3+ and Nd 3+ dopants.

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“…With increasing SrO addition, the diffraction peak (020) R nearby 44.5° disappeared gradually, and finally split to produce additional (002) T and (200) T reflections, evidence for a structural phase transition from rhombohedral (R) to tetragonal (T) perovskite phases. It is believed that the substitution of Sr 2+ (1.18Å) for Pb 2+ (1.19Å) has resulted in the reduction in the PMN‐PZT unit cell, which contributed to the enhancement of tetragonality and the diffraction peaks shifting toward larger angles …”

Section: Resultsmentioning

confidence: 99%

Structural phase transition and electrical properties of Sr²⁺ substituted porous PMN‐PZT ceramics

et al. 2018

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In this study, Sr2+ modified porous PMN‐PZT ceramics with one‐dimensional pore channels were produced by the ionotropic gelation process of alginate/PMN‐PZT suspensions. The ion‐exchange method was employed during the fabrication procedure to adjust the content of SrO addition. With the SrO addition increasing from 1.653 wt.% to 2.957 wt.%, the structural phase of porous PMN‐PZT ceramics transformed from rhombohedral (R) to tetragonal (T) perovskite phase. Accordingly, the electromechanical coupling coefficient (kt) value of porous PMN‐PZT ceramics decreased from 64.7% to 58.7%, while the hydrostatic figure of merit (HFOM) value increased from 1510 to 5547 × 10−15 m2/N, and acoustic impedance Z value ranged from 4.59 to 7.55 MRayls, which helped for applications in underwater transducers or hydrophones.

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Dielectric and piezoelectric properties of PZT ceramics doped with strontium and lanthanum

Cited by 81 publications

References 31 publications

Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures

Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures

Effect of lanthanum, neodymium on piezoelectric, dielectric and ferroelectric properties of PZT

Structural phase transition and electrical properties of Sr²⁺ substituted porous PMN‐PZT ceramics

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Dielectric and piezoelectric properties of PZT ceramics doped with strontium and lanthanum

Cited by 81 publications

References 31 publications

Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures

Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures

Effect of lanthanum, neodymium on piezoelectric, dielectric and ferroelectric properties of PZT

Structural phase transition and electrical properties of Sr2+ substituted porous PMN‐PZT ceramics

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Structural phase transition and electrical properties of Sr²⁺ substituted porous PMN‐PZT ceramics