Investigation of Complex Impedance and Modulus Properties of La or/and Ca Doped BaTiO3

Kadira, L.; Sayouri, S.; Elmesbahi, Abdelilah; Salhi, Abdelaziz

doi:10.1016/j.matpr.2019.04.093

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…This low-frequency dielectric dispersion is a characteristic property of ionic dielectric materials. 44 The easy motion of charges inside the grains and hindering it by the insulating grain boundaries lead to large accumulation of charges at the grain boundaries which is responsible for the high dielectric permittivity at low frequency (Wagner's and Koop's theory). 45 However, at high frequencies, space charge polarization vanishes due to fast-moving dipoles inertia toward the grain boundary, causing a decrease in dielectric permittivity.…”

Section: Resultsmentioning

confidence: 99%

The Impact of Gamma Radiation on the Structural, Optical, and Dielectric Properties of Polyacrylamide/Barium Titanate Nanocomposites

Zaghlool

Moghny

Mohamed

2023

ECS J. Solid State Sci. Technol.

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Polyacrylamide (PAM) was used as a matrix material for preparing nanocomposite samples filled with different weight fractions (1, 3, 5, 7, and 15%) of barium titanate (BaTiO3) by casting method. The PAM/7% BaTiO3 has been irradiated with gamma radiation at a dose of 200 Gy in order to investigate its impact on the structure as well as its optical and dielectric properties. The results show that the BaTiO3 nanoparticles are well incorporated inside the PAM matrix and the crystallite size of BaTiO3 has been decreased upon filling inside the PAM matrix as confirmed by the analysis of Fourier transform spectroscopy, and X-ray diffraction patterns, respectively. The prepared films show direct forbidden optical transition. Moreover, filling PAM with 7% BaTiO nanoparticles has increased the dielectric permittivity from 1.07 to 2.44 (at 100 kHz) with a slight increase in the loss factor from 0.015 to 0.020. In the other side, gamma radiation has decreased the crystallite size in relative to the un-irradiated sample with increased dielectric permittivity (2.89) and a slight decrease in the loss factor (0.019) at 100 kHz.

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Section: Resultsmentioning

confidence: 99%

The Impact of Gamma Radiation on the Structural, Optical, and Dielectric Properties of Polyacrylamide/Barium Titanate Nanocomposites

Zaghlool

Moghny

Mohamed

2023

ECS J. Solid State Sci. Technol.

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“…The activation energy is the minimum amount of energy required to start the electrical conduction mechanism within the material. [ 47 ] The value of relaxation time ( τ ) at a particular temperature gives the time required for thermally activated charge carriers to involve in the conduction process. [ 48,49 ] There is a decrease in the value of relaxation time with the rise in temperature, thus Arrhenius's relation is in good agreement with the sample prepared.…”

Section: Resultsmentioning

confidence: 99%

A Very Low Temperature Growth of BaTiO₃ Nanoparticles by Sol‐Hydrothermal Method

Dushyant

Kumar

et al. 2022

Physica Status Solidi (a)

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Low‐temperature intercessions are the most proficient technique to control the particle size in the nanometres range with low agglomeration. Herein, BaTiO3 (BT) nanoparticles (NPs) are prepared at low temperatures by using the sol‐hydrothermal technique. An X‐ray diffraction (XRD) pattern of the powder signifies the pure tetragonal phase, and the average crystallite size (43.2 nm) is calculated using different methods: Scherrer's, uniform deformation model (UDM), uniform stress deformation model (USDM), and uniform deformation energy density model (UDEDM) analysis, and the structure is refined by Rietveld refinement method with a good fit value (χ2 = 1.66). Spherical and uniform surface morphology is counted up for BT NPs. Under suitable conditions, BT NPs can be prepared with an average particle size of ≈115 ± 10 nm. However, after sintering, the average grain size (335 ± 10 nm) of the BaTiO3 nanopowder is found to increase with dense grain boundaries. The dielectric behavior of the sample is analyzed with the variation of frequency at different temperatures. The effect of grain and grain boundary on the electrical properties of the material is also investigated by using complex impedance spectroscopy (CIS).

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“…They found that the powders had a cube-shaped grain microstructure with an average particle size of between 75nm and 150nm, (Cernea et al, 2021). Kadira et al used the sol-gel method to test the dielectric properties of calcium-doped BT, and they found that the powders are in a pure perovskite phase without any secondary phases, (Kadira et al, 2016). In their investigation of the structural and dielectric characteristics of zirconium-doped BT ceramics using solid state reactions, Urmi et al found that the tetragonal phase with space group P4mm predominates.…”

Section: Introductionmentioning

confidence: 99%

Advances in the synthesis, characterizations and applications of barium titanate. A review

Lariski,

Zangina,

Ndikilar

et al. 2023

dujopas

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Barium titanate (BaTiO3) is a compound that has a structure called perovskite. Synthesis of BaTiO3 can be done by employing separate methods. BaTiO3 has four polymorphs which are cubic, tetragonal, orthorhombic and rhombohedral, depending on the temperature, it has a tetragonal structure at ambient temperature. This paper aims to review different synthesis methods of BaTiO3, these techniques can be used in the process of making ceramics as a molding material and also as an intermediate between thin films of metal oxides in various applications. The characterization techniques mostly used in determining the lattice constant, crystal structure functional group, morphology, elemental compositions and electrical properties, of the nanomaterial, including the various applications of BaTiO3 which includes modern electronic appliances and electrical power systems, the Multilayer Ceramic Capacitors (MLCs), biological, and microwave absorption, due to their piezoelectric and dielectric properties are reviewed.

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Investigation of Complex Impedance and Modulus Properties of La or/and Ca Doped BaTiO3

Cited by 6 publications

References 29 publications

The Impact of Gamma Radiation on the Structural, Optical, and Dielectric Properties of Polyacrylamide/Barium Titanate Nanocomposites

The Impact of Gamma Radiation on the Structural, Optical, and Dielectric Properties of Polyacrylamide/Barium Titanate Nanocomposites

A Very Low Temperature Growth of BaTiO₃ Nanoparticles by Sol‐Hydrothermal Method

Advances in the synthesis, characterizations and applications of barium titanate. A review

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Investigation of Complex Impedance and Modulus Properties of La or/and Ca Doped BaTiO3

Cited by 6 publications

References 29 publications

The Impact of Gamma Radiation on the Structural, Optical, and Dielectric Properties of Polyacrylamide/Barium Titanate Nanocomposites

The Impact of Gamma Radiation on the Structural, Optical, and Dielectric Properties of Polyacrylamide/Barium Titanate Nanocomposites

A Very Low Temperature Growth of BaTiO3 Nanoparticles by Sol‐Hydrothermal Method

Advances in the synthesis, characterizations and applications of barium titanate. A review

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A Very Low Temperature Growth of BaTiO₃ Nanoparticles by Sol‐Hydrothermal Method