Enhancement of switching/un-switching leakage current and ferroelectric properties appraised by PUND method of (Ba1-xCax)TiO3 lead free piezoelectric near MPB

Mahmoud, Abd El-razek; Ezzeldien, Mohammed; Parashar, S. K. S.

doi:10.1016/j.solidstatesciences.2019.04.011

Cited by 32 publications

(16 citation statements)

References 41 publications

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“…Figure 4 indicates a highly isotropic deformation of the BCT sample for subsequent field strength values (see Figure 4b), exactly as predicted by numerical simulation [19]. Interestingly, the cascade of butterfly curves that appears in the positive direction does not appear in the negative areas, which coincides with the simulated results for the isotropic polycrystalline BCT cited above.…”

Section: Resultssupporting

confidence: 84%

“…As large a strain as d = 0.14% was recorded under an electrical field as low as 4 kV/cm at a temperature of −50 • C. Additionally, a very small hysteresis is shown in Figure 4b for a large strain that can achieve an almost perfect structure with low ferroelectric domain pinning. The same parameter value recorded at room temperature (RT) is d = 0.14%, which is also extremely high for this particular composition [19].…”

Section: Resultssupporting

confidence: 63%

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A Large Piezoelectric Strain Recorded in BCT Ceramics Obtained by a Modified Pechini Method

et al. 2020

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There is a strong need in the industry to develop lead-free piezoelectrics for sensors and actuators. Although these materials have become an important component of many electronic devices, it is very important for the industry to decarbonise ceramic technology, especially through the introduction of modern sintering technologies. Among the many piezoelectric compounds available, Calcium Barium Titanate (BCT) have been widely investigated because of its similar performance to lead-containing Lead Titanate Zirconate (PZT). In this paper, a modified Pechini method for obtaining ceramic Ba0.9Ca0.1TiO3 nano-powders is described. Deviation from the established procedure resulted in the precipitation of the solution or obtaining of a low-quality (poorly crystallized) product with numerous impurities. The samples of BCT materials were examined to find their ideal microstructures and structures; these factors were confirmed by their outstanding X-ray diffraction spectra and high piezoelectric constant values that are comparable to commercial lead-containing materials.

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Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 63%

A Large Piezoelectric Strain Recorded in BCT Ceramics Obtained by a Modified Pechini Method

et al. 2020

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“…Low values for leakage current and saturation after ±6 V demonstrates high stability of these NPLs even at high voltages. Leakage current measurements may contribute to calculate the switching charge densities ( Q SW ) through pulse measurements [ 42 ]. For this reason, positive up and negative down (PUND) approach was adopted which proved quite feasible for determining the energy storage properties for capacitive materials [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Ethylene glycol assisted three-dimensional floral evolution of BiFeO ₃ -based nanostructures with effective magneto-electric response

et al. 2020

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Controlled growth of nanostructures plays a vital role in tuning the physical and chemical properties of functional materials for advanced energy and memory storage devices. Herein, we synthesized hierarchical micro-sized flowers, built by the self-assembly of highly crystalline, two-dimensional nanoplates of Co- and Ni-doped BiFeO 3 , using a simple ethylene glycol-mediated solvothermal method. Pure BiFeO 3 attained scattered one-dimensional nanorods-type morphology having diameter nearly 60 nm. Co-doping of Co and Ni at Fe-site in BiFeO 3 does not destabilize the morphology; rather it generates three-dimensional floral patterns of self-assembled nanoplates. Unsaturated polarization loops obtained for BiFeO 3 confirmed the leakage behaviour of these rhombohedrally distorted cubic perovskites. These loops were then used to determine the energy density of the BiFeO 3 perovskites. Enhanced ferromagnetic behaviour with high coercivity and remanence was observed for these nanoplates. A detailed discussion about the origin of ferromagnetic behaviour based on Goodenough–Kanamori's rule is also a part of this paper. Impedance spectroscopy revealed a true Warburg capacitive behaviour of the synthesized nanoplates. High magneto-electric (ME) coefficient of 27 mV cm −1 Oe −1 at a bias field of −0.2 Oe was observed which confirmed the existence of ME coupling in these nanoplates.

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“…The diffraction peaks were cited from KNN with orthorhombic symmetry (PDF# 71-0946) and (Amm2) space group. As it is well known, the ionic radius of Li + (1.23 Å) is very close to the ionic radius of Na + (1.39 Å) and, K + (1.6 Å), so it is suitable to occupy the A site of KNN lattice, while the ionic radius of Sb 5+ is (0.6 Å) is very close to the ionic radius of Nb 5+ (0.69 Å), so it is suitable to occupy the B site of KNN lattice [2]. The Bragg reflections of the sintered ceramic at 1080 °C/2 h shown the same pattern of calcined powder indicate the thermal stability of compound at high sintering temperature.…”

Section: Phase Structure and Microstructure Propertiesmentioning

confidence: 89%

“…Ferroelectric ceramic materials are widely used in several electronic applications, such as sensors, actuators, and transducers [1][2][3][4][5][6][7]. Owing to the environmental restrictions on lead-based materials and their high toxicity, (K 1-x ,Na x ) NbO 3 has drawn much attention as promising lead-free candidates materials instead of lead-based such as PZT due to its excellent performance [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Sub-switching domain effect for analysis the non-linear dielectric behavior of (K0.49 Na0.49Li0.02) (Nb0.98Sb0.02)O3 ceramic based on Rayleigh model

Atito

Shaban

Salem

et al. 2022

J. Korean Ceram. Soc.

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The solid-state sintering technique has been implemented to synthesize (K0.5Na0.5NbO3)-0.02(LiSbO3) (KNN-LS) Pb-free ceramic. The crystal structure, dielectric and ferroelectric properties of the prepared material were investigated. Pure orthorhombic perovskite phase [I(220)/I(002) = 1.68] with Amm2 space group has been detected at room temperature for sintered ceramic. Two anomalous permittivity peaks corresponding to orthorhombic–tetragonal (O–T) phase transition at T = 175 °C and tetragonal–cubic (T–C) phase transition at T = 355 °C have been observed. At polymorphic phase transition, the Rayleigh model shown the extrinsic contributions caused by domain wall motion is about 80%, while the intrinsic contribution attributed to the lattice distortion is about 20%. Ferroelectric properties were investigated in a wide range of temperatures (RT-225)°C. The results shown a conductive material at high temperature due to the higher cation disorder and leakage current above PPT. The present results are interested for understanding the mechanism of t permittivity–temperature behavior of KNN-doped LS ions based on Rayleigh model. The large remnant polarization and low coercive field below PPT make the material a suitable candidate for energy storage application.

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Enhancement of switching/un-switching leakage current and ferroelectric properties appraised by PUND method of (Ba1-xCax)TiO3 lead free piezoelectric near MPB

Cited by 32 publications

References 41 publications

A Large Piezoelectric Strain Recorded in BCT Ceramics Obtained by a Modified Pechini Method

A Large Piezoelectric Strain Recorded in BCT Ceramics Obtained by a Modified Pechini Method

Ethylene glycol assisted three-dimensional floral evolution of BiFeO ₃ -based nanostructures with effective magneto-electric response

Sub-switching domain effect for analysis the non-linear dielectric behavior of (K0.49 Na0.49Li0.02) (Nb0.98Sb0.02)O3 ceramic based on Rayleigh model

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Enhancement of switching/un-switching leakage current and ferroelectric properties appraised by PUND method of (Ba1-xCax)TiO3 lead free piezoelectric near MPB

Cited by 32 publications

References 41 publications

A Large Piezoelectric Strain Recorded in BCT Ceramics Obtained by a Modified Pechini Method

A Large Piezoelectric Strain Recorded in BCT Ceramics Obtained by a Modified Pechini Method

Ethylene glycol assisted three-dimensional floral evolution of BiFeO 3 -based nanostructures with effective magneto-electric response

Sub-switching domain effect for analysis the non-linear dielectric behavior of (K0.49 Na0.49Li0.02) (Nb0.98Sb0.02)O3 ceramic based on Rayleigh model

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Ethylene glycol assisted three-dimensional floral evolution of BiFeO ₃ -based nanostructures with effective magneto-electric response