Colossal dielectric constant and ferroelectric investigation of BaTiO3 nano-ceramics

Humera, Nudrat; Riaz, Saira; Ahmad, Naveed; Arshad, Faiza; Zafar, Ramna; Ali, Saqib; Idrees, Sidra; Noor, Hadia; Atiq, Shahid; Naseem, Shahzad

doi:10.1007/s10854-020-03100-8

Cited by 15 publications

(5 citation statements)

References 42 publications

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“…The experimental results from the figure above show that in the added frequency band (10 −1 Hz to 10 6 Hz), εr changes with frequency consistent. Polarization in nano-ceramics is produced due to four types of mechanisms: (1) interfacial polarization or space charge polarization; (2) dipolar polarization; (3) ionic polarization; and (4) electronic polarization [28]. As the doping concentration of nano-TiO 2 increases, ε r also increases, mainly the addition of nano-TiO 2 particles will increase the degree of polarization of the medium.…”

Section: Relative Permittivity and Dielectric Loss Factormentioning

confidence: 99%

Dielectric and space charge characteristics of nano-modified liquid silicone rubber for high-voltage DC cable accessories

Chen

Zhang

et al. 2020

J Mater Sci: Mater Electron

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In order to solve the problem of space charge accumulation in high-voltage DC cable accessories, nanometer titanium dioxide (TiO 2) doping method is used to improve the space charge performance of liquid silicone rubber (LSR). Conductivity, dielectric spectrum and DC breakdown field strength, space charge distribution, and the trap level distribution of nano-TiO 2 / LSR composite samples were tested in this paper. With the increase of the doping concentration of nanoparticles, the DC conductivity increased, and the DC breakdown field strength decreased. The ε r of the TiO 2 /LSR composite sample increased with the increase in the doping concentration of nano-TiO 2. As the frequency increased, tanδ decreased first in the lowfrequency region and then increased in the high frequency. When the electric field strength increases from 10 to 20 kV/mm, the same polarity charges appear near the upper and lower electrodes of the sample, and the space charge accumulation doubled. After the addition of nano-TiO 2 , under the two electric field strengths, the space charge accumulation of 4 wt%-TiO 2 / LSR composite materials decreased by 24.55 nc and 81.03 nc, respectively. The trap energy level of the 4 wt% nano-TiO 2 composites becomes smaller, and shallow traps are introduced, it was verified that the addition of 4 wt% nano-TiO 2 particles reduced the space charge inside the composite sample and achieved the effect of suppressing space charge.

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Section: Relative Permittivity and Dielectric Loss Factormentioning

confidence: 99%

Dielectric and space charge characteristics of nano-modified liquid silicone rubber for high-voltage DC cable accessories

Chen

Zhang

et al. 2020

J Mater Sci: Mater Electron

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“…Finding a simple way to created defect-complex structures is an important task that will facilitate access to enormous dielectric constant materials. Defectcomplex structures have been easily created in the ABO 3 perovskite structure by single or co-doping [25][26][27][28][29][30][31][32][33]. CP at lowfrequency range with a high loss tangent was reported by Humera et al [25], on BaTiO 3 nanoceramics.…”

Section: Introductionmentioning

confidence: 95%

“…Defectcomplex structures have been easily created in the ABO 3 perovskite structure by single or co-doping [25][26][27][28][29][30][31][32][33]. CP at lowfrequency range with a high loss tangent was reported by Humera et al [25], on BaTiO 3 nanoceramics. A CP of over 10 4 with a low dielectric loss, less than 0.05, was reported by Qiao et al [26] on Bi-doped SrTiO 3 ceramics.…”

Section: Introductionmentioning

confidence: 95%

Colossal dielectric permittivity and high energy storage efficiency in barium strontium titanate ceramics co-doped with bismuth and lithium

Alkathy¹,

Raju²,

Eiras³

2021

J. Phys. D: Appl. Phys.

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The development of energy storage devices in lead-free perovskite materials is critically important in addressing the environmental issues of perovskite lead. In this article, for the first time, lead-free (Ba0.60Sr0.40)(1−x)(Bi,Li) x TiO3, abbreviated as (BST6:BLx%); (0%⩽ x ⩽ 8%) ceramics, have been successively synthesized via the conventional solid-state reaction method. The structural evolution, dielectric and energy storage properties, as functions of co-doping levels, were systematically studied by x-ray diffraction, x-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy, scanning electron microscopy, impedance analyzer, and a Radiant Precision Premier II Analyzer. It was found that a small amount of co-dopants induced a colossal permittivity (CP) (over 105) with low loss (<0.1), a maximum energy storage density of 0.3856 J cm−3 with a BDS of ∼100 kV cm−1, and an efficiency of over 90%. The defects and chemical state of the elements contained in the material’s surface were investigated using XPS. In conjunction with the results of XPS and complex impedance studies, the mechanism of massive permittivity was interpreted based on a defect-dipole model. We believe that BST6:BLx% ceramics, as CP and high energy storage efficiency materials, might be considered a promising candidate for high energy storage applications.

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“…В настоящее время доступны зеркала с коэффициентом отражения, весьма близким к 100%. В частности, интенсивен поток публикаций по средам с " колоссальной" диэлектрической постоянной, в том числе более 10 7 [14], что обеспечивает почти идеальное отражение и, соответственно, низкие требования к скорости движения зеркала. Возможными вариантами служат отражение от плазменных зеркал [15] или от быстро движущихся неоднородностей среды.…”

Section: отражение от движущегося зеркалаunclassified

Усиление Электрической Площади Импульса При Отражениях От Движущегося Зеркала

Розанов¹

2022

Оптика И Спектроскопия

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An analysis was made of the transformation of the electric area of an electromagnetic pulse upon reflection from a moving mirror. Conditions are found under which reflection leads to an increase (in absolute value) of the electric area. For a dynamic resonator, one of the mirrors of which periodically oscillates, an expression is obtained for the threshold for generating pulses with an ever-increasing area. Nonlinear factors that limit the exponential growth of the pulse electric area are discussed.

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Colossal dielectric constant and ferroelectric investigation of BaTiO3 nano-ceramics

Cited by 15 publications

References 42 publications

Dielectric and space charge characteristics of nano-modified liquid silicone rubber for high-voltage DC cable accessories

Dielectric and space charge characteristics of nano-modified liquid silicone rubber for high-voltage DC cable accessories

Colossal dielectric permittivity and high energy storage efficiency in barium strontium titanate ceramics co-doped with bismuth and lithium

Усиление Электрической Площади Импульса При Отражениях От Движущегося Зеркала

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