Results 31 to 40 of about 2,053 (224)
Journal of Advanced CeramicsA high voltage gradient (Vg) of ZnO-based varistor ceramics is critical for realizing miniaturized and lightweight overvoltage protection devices. However, improving Vg of ZnO-based varistor ceramics through conventional high-temperature sintering ...
Shenglin Kang +8 more
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Modeling of electrical transport in Zinc Oxide varistors [PDF]
Advances in Radio Science, 2014 The electrical transport in zinc oxide (ZnO) varistors is analyzed using microstructural material modeling. The fully three dimensional current distribution is computed by means of a nonlinear equivalent circuit model representing the assembly of current
K. Bavelis, E. Gjonaj, T. Weiland
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Effect of Cr2O3 on properties of ZnO-Bi2O3 based high-voltage varistor ceramics
Cailiao gongchengZnO-Bi2O3-Co2O3-NiO-Mn3O4-SiO2-Cr2O3 varistor ceramics were prepared by solid-phase sintering method.The effects of different doping amounts of Cr2O3 on the microstructure and electrical properties of ZnO varistor ceramics were investigated, and the ...
GUI Yanghai +5 more
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Cerâmica, 2006 Varistores à base de SnO2 foram preparados pelo processo convencional de mistura de óxidos. As amostras foram sinterizadas a 1250 °C por 2 h. Os difratogramas obtidos por difração de raios X e as análises por microscopia eletrônica de varredura ...
M. M. Oliveira +6 more
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Microstructural evaluation of rare-earth-zinc oxide-based varistor ceramics
Materials Research, 2005 Zinc oxide varistors are nonlinear voltage dependent ceramic resistors used to suppress and limit transient voltage surges. The work reported in this paper involves the relationship between microstructural characteristics and the varistor performance of ...
José Geraldo de Melo Furtado +4 more
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Journal of Advanced Ceramics, 2023 Highly stable ZnO varistor ceramics with steadily decreasing power loss have been put into applications in electrical and electronic systems for overvoltage protections, even with the absence of general understandings on their aging behaviors.
Zhuolin Cheng +5 more
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Investigation of Diagnostic Techniques for Metal Oxide Surge Arresters [PDF]
, 2005 Gapless metal oxide surge arresters(MOSA)have been available in the market for many years since they were first introduced in the 1970's. The aim of this study is to investigate some reliable diagnostic techniques to assess the condition of a metal oxide
Mardira, Karl P. +2 more
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Comparative Studies on Degradation of Varistors Subjected to Operation in Surge Arresters and Surge Arrester Counters [PDF]
Archives of Metallurgy and Materials, 2020 The paper presents results of investigation of microstructure and micro-hardness for material of ZnO varistors applied to 110 kV surge arrester and surge arrester counter.
P. Papliński +6 more
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Preparation of zinc-oxide and zinc-sulfide powders by controlled precipitation from aqueous-solution [PDF]
, 1994 Resumo não disponível..
Jesus, Júlio D. Pedrosa de +2 more
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Synthesis of ZnO based nanopowders via a non-hydrolytic sol gel technique and their densification behaviour and varistor properties [PDF]
Processing and Application of Ceramics, 2010 Hexagonal nanocrystalline varistor grade ZnO particles with size 50 nm and the specific surface area of 28 m2/g have been prepared by non-aqueous gelation technique involving diethylene glycol and triethanolamine.
Shereef Anas +4 more
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