Results 21 to 30 of about 968 (215)
Microstructural analysis of varistors prepared from nanosize ZnO [PDF]
, 2004 ZnO nanoparticles were prepared by a solid state pyrolysis reaction of zinc acetate dihydrate and oxalic acid dihydrate at 500uC. The course of reaction at various temperatures was followed by XRD.
Pillai, S.C. +7 more
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High Voltage, 2020 Element doping is an effective method to improve the performance of ZnO varistors. Previous studies mainly focused on the variation of microstructures and Schottky barriers.
Men Guo +7 more
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مجلة المختار للعلوم, 2004 للسيراميك استخدامات عديدة علي نطاق واسع في مجال الكهرباء (الالكترونيات). ويتسع مدى هـذه الاستخدامات ليشمل الوقاية من خطر الجهد باستخدام الفارستور (Varistors) إلى مقاومات الفارستور (Varistors) ذات درجة الحرارة الموجبة إلى العوازل السيراميكية ...
D. E. Ibrahim, Osama Desouky
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Influence of processing on microstructure and electrical characteristics of multilayer varistors
Journal of Advanced Ceramics, 2019 The paper reports on the influence of processing on microstructure and electrical properties of multilayer varistors based on zinc oxide doped with Bi2O3, Sb2O3, Co2O3, MnO, Cr2O3, B2O3, and SiO2.
D. Szwagierczak, J. Kulawik, A. Skwarek
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Simulation research on space charge characteristics of zinc oxide varistor
Energy Reports, 2020 Zinc oxide (ZnO) lightning arresters have good protection performance and have been widely used in power systems. ZnO varistor is the core component of the arrester, and its electrical performance determines the overvoltage protection level of the ...
Qian Wang, Ruonan Zhang, Chenjie Ji
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Comparative Characterization of Different Cutting Strategies for the Sintered ZnO Electroceramics
Applied Sciences, 2021 Sintered zinc oxide (ZnO) ceramic is a fragile and difficult-to-cut material, so finishing operations demand handling cautious and accurate surface tolerances by polishing, grinding, or machining.
Jaka Dugar, Awais Ikram, Franci Pušavec
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Influence of Fine Crystal Percentage on the Electrical Properties of ZnO Ceramic-Based Varistors
Crystals, 2020 Herein, the effect of nanocrystal percentage in bulk-ZnO varistors was studied. The structure of ZnO nanocrystals was examined using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM).
Abdullah Aljaafari, Ahmed Sedky
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DC Aging Mechanism of Co2O3-Doped ZnO Varistors
Energies, 2021 Lowered power loss and asymmetrically electrical parameters are reported in the DC aging of Co2O3-doped ZnO varistors in this paper. Based on the frequency domain dielectric responses of the pristine and degraded samples, the present study explores the ...
Xia Zhao +5 more
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Crystals, 2020 ZnO-based ceramic varistors have shown excellent electrical and dielectric properties due to their characteristics microstructures represented by the arrangement of their grains and grain boundaries that allow the absorption and flow of energy when ...
J. Porcayo-Calderon +8 more
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Electrical properties of ZnO varistors prepared by direct mixing of constituent phases [PDF]
Science of Sintering, 2006 Varistor samples containing different amounts of constituent phases were prepared by direct mixing of constituent phases. Detailed electrical characterization was performed to explain the influence of minor phases (spinel and intergranular phases) on ...
Žunić M., Branković Z., Branković G.
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