Effects of second particles on nonlinear resistance properties of microvaristor-filled composites

Matsuzaki, Hidehito; Nakano, Toshiyuki; Ando, Hiroki

doi:10.1109/ceidp.2012.6378751

Cited by 10 publications

(4 citation statements)

References 3 publications

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“…Additionally, the switching field E b of ZnO composites can be flexibly tuned according to specific requirements in the range of 0.3-2 kV/mm through controlling the grain size in the fillers, the filler diameter as well as the filler concentrations [78] . As a result, ZnO composites have attracted wide attention in the past decades, and their performance has been well studied [79,80] . However, the diameter of SiC particles is usually several micrometers but that of ZnO microvaristors is around tens of micrometers, which makes them easily precipitate in the polymer matrix and their combination with the matrix is rather loose [81] .…”

Section: Typical Sads and Their Nonlinear Perfor-mancesmentioning

confidence: 99%

Smart dielectric materials for next-generation electrical insulation

Huang

Han

Yang

et al. 2022

iEnergy

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Smart dielectric materials with bioinspired and autonomous functions are expected to be designed and fabricated for next-generation electrical insulation. Similar to organisms, such dielectrics with self-adaptive, self-reporting, and self-healing capabilities can be employed to avoid, diagnose, and repair electrical damage to prevent catastrophic failure and even a blackout. Compared with traditional dielectrics, the utilization of smart materials not only increases the stability and durability of power apparatus but also reduces the costs of production and manufacturing. In this review, researches on self-adaptive, self-reporting, and self-healing dielectrics in the field of electrical insulation, and illuminating studies on smart polymers with autonomous functions in other fields are both introduced. The principles, methods, mechanisms, applications, and challenges of these materials are also briefly presented.

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Section: Typical Sads and Their Nonlinear Perfor-mancesmentioning

confidence: 99%

Smart dielectric materials for next-generation electrical insulation

Huang

Han

Yang

et al. 2022

iEnergy

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“…When we dope ZnO microvaristors in epoxy resin, the mixtures still show great liquidity during preparation. The ZnO microvaristors will inevitably settle down in epoxy resin, which will lead to the uneven distribution of ZnO microvaristors in the composite and influence the non-linear conductivity of the composite directly [19][20][21]. Matsuzaki et al [19,20] put tetrapod ZnO whiskers as the second filler in ZnO microvaristors/epoxy resin composite to suppress the sedimentation of ZnO microvaristors.…”

Section: Introductionmentioning

confidence: 99%

“…The ZnO microvaristors will inevitably settle down in epoxy resin, which will lead to the uneven distribution of ZnO microvaristors in the composite and influence the non-linear conductivity of the composite directly [19][20][21]. Matsuzaki et al [19,20] put tetrapod ZnO whiskers as the second filler in ZnO microvaristors/epoxy resin composite to suppress the sedimentation of ZnO microvaristors. Liang et al [21] prevented ZnO nanoparticles from sedimentation in epoxy resin by stirring the mixture continuously in the curing stage of epoxy resin.…”

Section: Introductionmentioning

confidence: 99%

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Non‐linearly conductive ZnO microvaristors/epoxy resin composite prepared by wet winding with polyester fibre cloth

Yuan

Huang

et al. 2021

High Voltage

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ZnO microvaristors/epoxy resin composite has drawn great attention from academia and industry for its adjustable non-linear conductivity, high mechanical strength, and good ageing resistance. However, the sedimentation of ZnO microvaristors in epoxy resin during preparation is the key problem, which limits its application in engineering. In this study, a novel method of wet winding with polyester fibre cloth is proposed to prepare the ZnO microvaristors/epoxy resin composite. The anti-settling effect of ZnO microvaristors in the composite is verified by scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). The microstructure shows that ZnO microvaristors distribute uniformly in the composite, and the content difference of ZnO microvaristors at the top and bottom part is only 0.4%. The composite shows typical non-linear conductivity, and the threshold electric field and the non-linear coefficient decrease with the content of ZnO microvaristors, while the conductivity in the insulating state shows an increasing trend. To verify the field grading effect of the composite with non-linear conductivity (CNC), a finite element model of a needle-plate electrode, simulating the condition of a conductive tip in a solid insulated system, is set up. CNC can adaptively grade the electric field, which reduces the surface electric field of the needle tip by 86.6% and the highest electric field in the system by 82.1%. This wet winding method solidifies the industrial application of CNC in high-voltage power equipment.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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