Dielectric properties, relaxation and study of conduction process of Ba0.5Sr0.5Ti0.99Sn0.01O3 ceramics

Pattanayak, Milinda; Biswal, L.; Roy, Nirmalya

doi:10.1016/j.matpr.2020.12.1089

Cited by 6 publications

(2 citation statements)

References 31 publications

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“…Also, it has been seen that doping of nickel increases the magnitude of both parts of dielectric constant, due to grain boundary effects. This dielectric behavior is explained in reference to the Koop's theory [48][49][50], which tells that the grain boundary affects the dielectric constant at lower frequencies and dominancy would be given to conductive grains at higher frequencies [47,51,52]. The plot between ε′ and ε″ shows a linear relation (figure 8).…”

Section: Dielectric Constantmentioning

confidence: 92%

Effect of nickel substitution on structural and dielectric properties of Mg-Zn based spinel ferrite nanoparticles

et al. 2022

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Herein, we used sol-gel auto combustion technique for fabrication of the series of nickel substituted magnesium-zinc spinel ferrite (Mg0.3NixZn0.7-xFe2O4) nanoparticles by varying nickel concentrations as 0.00 ≤ x ≤ 0.20. X-ray diffraction (XRD) investigation evidenced that the synthesized nanomaterials are of spinel ferrite nature with secondary phase. Moreover, the crystallite size was observed to be in the range from 13 to 17 nm as estimated by Scherrer’s formula. It has been found that the structural parameters (e.g., bulk density, lattice constant, micro strain, crystallite size, surface area etc.) of the as-synthesized magnesium-zinc spinel ferrite nanoparticles have been strongly influenced by doping content of nickel. Moving further, we have investigated the dielectric properties of the prepared nanoparticles in the frequency range from 20 Hz to 20 MHz. The remarkable electric modulus, impedance and dielectric properties of the prepared spinel ferrites made these materials a potential candidate for low- and high-frequency applications.

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Section: Dielectric Constantmentioning

confidence: 92%

Effect of nickel substitution on structural and dielectric properties of Mg-Zn based spinel ferrite nanoparticles

et al. 2022

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“…Conversely, at higher frequencies the electric field oscillated rapidly for the domain walls to keep pace. This impedes their motion and results in a lower dielectric constant [55,56].…”

Section: Dielectric and Piezoelectric Propertiesmentioning

confidence: 99%

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

et al. 2023

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Co-doped barium titanate (BT) piezoceramics are applied in advanced energy harvesting systems. In the present study, Ba1-2xHo2xTi1-xMnxO3 (x=0, 0.02, 0.04, and 0.06) were produced via the sol-gel-assisted solid state co-doping technique followed by microwave and conventional heating. In the current investigation, the synthesizing and phase characterization, allotropic transition, morphological examination, elemental analysis and dielectric-piezoelectric responses were investigated by X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC) and Thermo-Gravimetric Analysis (TGA), Field-Emission Scanning Electron Microscope (FESEM), Energy-Dispersive x-ray Spectroscopy (EDS), Mapping analysis and inductance-Capacitance-Resistance meter (LCR meter) techniques, respectively. The XRD pattern and DSC/ TGA outcomes demonstrated that tetragonal BT phases without minor BaCO3 secondary phases are synthesized properly, and that the negligible unsolicited BaCO3 phases are thoroughly calcined by a microwave at 900℃. Doping resulted in an increase in tetragonality (c/a) of 0.19%, 0.15%, and 0.04%, respectively, compared to the pure calcined BT. Additionally, the crystallite size of BT decreased significantly by 59%, 58%, and 52%, respectively. The results revealed that the microwave-sintered samples have higher purity, drastic delicate and finer grain size distribution, and superior tetragonal-ity with respect to the conventionally sintered furnace samples. Furthermore, the piezoelectric constant for the microwave sintered and the conventionally sintered samples with the same value of x=0.04 were 390 and 370 (pC/N), respectively, which established that the sintering method has satisfactory affection (approximately 6%) on the piezo function of the samples. Eventually, the prepared samples which had 0, 2, 4, and 6 % moles of Ho3+-Mn2+ cations and were sintered by a microwave compared to the similar specimens fabricated by the furnace had superior dielectric constants of 2.6, 1.1, 2.2 and 2.9 times, respectively.

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Simultaneous enhancement of the optical absorption, ferroelectric polarization, and photocatalytic activity by designing the Ti/Fe ratio for Bi5Ti3FeO15

Fei,

Peng,

Tang

et al. 2024

Ceramics International

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Dielectric properties, relaxation and study of conduction process of Ba0.5Sr0.5Ti0.99Sn0.01O3 ceramics

Cited by 6 publications

References 31 publications

Effect of nickel substitution on structural and dielectric properties of Mg-Zn based spinel ferrite nanoparticles

Effect of nickel substitution on structural and dielectric properties of Mg-Zn based spinel ferrite nanoparticles

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

Simultaneous enhancement of the optical absorption, ferroelectric polarization, and photocatalytic activity by designing the Ti/Fe ratio for Bi5Ti3FeO15

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