Results 81 to 90 of about 1,546 (174)
Influence Mechanism of Micro Grain-boundary Parameters to the Electrical Properties of ZnO Varistor
工程科学与技术ZnO varistors exhibit excellent nonlinear voltage–current characteristics and substantial energy capacity, enabling them to absorb impulse energy during power system overvoltages and thus protect the electrical equipment.
Pengfei MENG +6 more
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Electrical characterization and modeling of varistors
In this work, a generalized experimental methodology was developed for the electrical characterization of metal oxide varistors and for analyzing their behavior under DC and AC voltages of various frequencies (45 Hz – 1 kHz) and under electromagnetic ...
Staikos, Evangelos +1 more
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Microwave Sintering Technology for the Production of Metal Oxide Varistors
, 1990 A microwave sintering technology has been developed for the production of metal oxide varistors. The electrical properties (leakage current and non-linearity coefficient) of the microwave sintered devices were found to be comparable to those obtained for
A. Pant +4 more
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Journal of Mechanical Engineering and Sciences, 2014 Titanium dioxide (TiO2) varistors doped with tungsten oxide (WO3) and bismuth oxide (Bi2O3) were investigated. The microstructure and electrical characterization were studied, where the effects of different concentrations of WO3 and a fixed amount of ...
Z. Kothandapani +4 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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Low-temperature Sintering of Zinc Oxide Varistors
, 1990 High-field varistors in the system ZnO-CoO-MnO-Bi2O3 were fabricated using powders prepared by a previously developed coprecipitation process. Following calcination, the powders were compacted and densified by conventional pressureless sintering at ...
Voigt, James A. +3 more
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Electrical engineering & Electromechanics, 2019 In the testing laboratories of Ukraine, there is no high-voltage equipment of the necessary energy for testing surge arresters for explosion safety, which does not allow to estimate this indicator at the stage of development of prototypes.
Yu. N. Shumilov, V. I. Bondarenko
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An Experimental Study of the Failure Mode of ZnO Varistors Under Multiple Lightning Strokes
, 2019 In this study, in order to explore the failure mode of ZnO varistors under multiple lightning strokes, a five-pulse 8/20 μs nominal lightning current with pulse intervals of 50 ms was applied to ZnO varistors.
Chunlong Zhang +5 more
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PROCESSING AND CHARACTERIZATION OF LOW-VOLTAGE VARISTORS
, 1994 ZnO seed particles and Cr2O3 were used in this study to control the microstructure of ZnO varistors. The seed particles were prepared by adding 1.0 mol % BaO to ZnO. The powder was then calcined at 800-degrees-C for 2 h, pressed into pellets and sintered
Longo, Elson +3 more
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IEEE Access, 2019 This paper investigated the effects of sintering temperature on the microstructure and electrical properties of ZrO2-doped zinc oxide (ZnO) varistor ceramics. The results show that, the additive ZrO2 exists as independent second phase between ZnO grains,
Pengkang Xie, Jianping Hu
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