Electrical properties of semi-conductive composites with different Li0.5La0.5TiO3 content

Zhao, Shuang; Yin, Hong; Wang, Ciyao; Chen, Shumei; Zhang, Lei; Hao, Chuncheng; Liu, Qingquan

doi:10.1016/j.matlet.2020.128664

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…There are two ways to suppress charge injection. The first is to enhance the ability of the semiconductive layer to limit the charge so that the charge moves only in the semiconductive layer and does not easily escape [27,28]. The second is to reduce the influence of the external electric field.…”

Section: The Mechanism By Which Pani Inhibits Charge Injection Into T...mentioning

confidence: 99%

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

et al. 2021

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In this study, conductive polyaniline (PANI) ribbons were introduced to a semiconductive layer to improve the conductivity stability of the layer during thermal expansion and enhance its ability to inhibit charge injection into the insulating layer. To maximise the effect of PANI, PANI and carbon black (CB) were preformed into a uniformly dispersed composite, which was then added to the polymer matrix of the semiconductive layer. The experimental results show that the resistivity of the semiconductive layer containing the PANI/CB composite is more stable during thermal expansion than that of the semiconductive layer only doped with CB. This is attributed to the conductive CB network being enhanced by the PANI ribbons. In addition, due to the unique conductivity mechanism and high dielectric constant of PANI, the semiconductive layer has a strong ability to inhibit space charge injection into the insulating layer.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Section: The Mechanism By Which Pani Inhibits Charge Injection Into T...mentioning

confidence: 99%

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

et al. 2021

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“…The composition of copolymer determines its compatibility with CB, which leads to considerable discrepancy in the aggregation morphology and dispersivity of CB in semi-conductive polymeric composites, and thus affects charge injections at the interface between semi-conductive shielding and insulation layers [ 18 , 19 ]. By introducing fast-ionic conductors into semi-conductive composites, a favorable conductive network could be established to increase the positive temperature coefficient and reduce the kinetic energy of transporting charges, thus improving space charge characteristics of insulation layer [ 20 , 21 ]. Due to the difference of material structures between the composite semiconductor and insulating polymer that should be developed for cable fabrications, pertinent technologies of polymeric hetero-junctions and surface electrodes are urgently desired for constructing the insulation system of transmission cable.…”

Section: Introductionmentioning

confidence: 99%

Charge Injection and Dielectric Characteristics of Polyethylene Terephthalate Based on Semiconductor Electrodes

2021

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Employing a novel semiconductor electrode in comparison with the traditional semiconductor electrode made of polyethylene/ethylene-vinyl-acetate copolymer/carbon-black (PE/EVA/CB) composite, characteristic charge carriers are injected into polyethylene terephthalate (PET) as a polymer dielectric paradigm, which will be captured by specific deep traps of electrons and holes. Combined with thermal stimulation current (TSC) experiments and first-principles electronic-state calculations, the injected charges from the novel electrode are characterized, and the corresponding dielectric behavior is elucidated through DC conductance, electrical breakdown and dielectric spectrum tests. TSC experiments with novel and traditional semiconductor electrodes can distinguish the trapping characteristics between hole and electron traps in polymer dielectrics. The observable discrepancy in space charge-limited conductance and the stable dielectric breakdown strength demonstrate that the electron injection into PET film specimen is restricted by using the novel semiconductor electrode. Attributed to the favorable suppression on the inevitable electron injections from metal electrodes, adopting novel i-electrode can avoid the evident abatement of dipole orientation polarization caused by space charge clamp, but will engender the accessional high-frequency dielectric loss from dielectric relaxations of interface charges at i-electrodes.

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Effect of La2Li0.5Co0.5O4 in semiconductive nanocomposites on suppression of space charge injection to the insulating medium for high-voltage direct current cables

et al. 2021

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Electrical properties of semi-conductive composites with different Li0.5La0.5TiO3 content

Cited by 6 publications

References 7 publications

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

The effect of a conductive polyaniline/carbon black composite on the performance of a semiconductive layer

Charge Injection and Dielectric Characteristics of Polyethylene Terephthalate Based on Semiconductor Electrodes

Effect of La2Li0.5Co0.5O4 in semiconductive nanocomposites on suppression of space charge injection to the insulating medium for high-voltage direct current cables

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