Results 21 to 30 of about 2,070 (218)

Investigation of microstructure of ZnO varistors taken from surge arrester counters [PDF]

Archives of Metallurgy and Materials, 2019
The paper presents investigations of microstructure of varistors of damaged surge arrester counters. A similar ZnO varistor, not subjected before to operation, was a point of reference in this research.
P. Papliński, J. Wańkowicz, P. Ranachowski, Z. Ranachowski   +3 more
doaj   +1 more source

Electronic properties of SnO2-based ceramics with double function of varistor and humidity sensor [PDF]

, 2009
This is the post-print version of the article. The official published version can be obtained from the link below - Copyright @ 2010 AD-Tech.Tin dioxide based varistor ceramics SnO2-Co3O4-Nb2O5-Cr2O3-xCuO (x=0; 0.05; 0.1 and 0.5) were made and their ...
Bulpett, R, Sandoval-García, AP, Jones, Benjamin, Jimenez-Santana, G, Sandoval-García, A.P., Jones, BJ, Gaponov, A.V., Glot, AB, Gaponov, AV, Glot, A.B.   +9 more
core   +1 more source

Case Study about the Energy Absorption Capacity of Metal Oxide Varistors with Thermal Coupling

Energies, 2019
Metal oxide varistors are applied today inside modern surge arresters for overvoltage protection for all voltage levels. Their main issue is the thermal activation of their crossing current, which could lead to complete destruction by thermal runaway ...
Flaviu Mihai Frigura-Iliasa, Sorin Musuroi, Ciprian Sorandaru, Doru Vatau   +3 more
doaj   +1 more source

Synthesis by Hydrothermal Treatment of ZnO-Based Varistors Doped with Rare Earth Oxides and Their Characterization by Impedance Spectroscopy

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, J.J. Ramos-Hernandez, C.D. Arrieta-Gonzalez, J.G. Chacon-Nava, J.G. Gonzalez-Rodriguez, E. Porcayo-Palafox, M. Sanchez-Carrillo, J.P. Flores-De los Rios, L. Martinez-Gomez   +8 more
doaj   +1 more source

ZnO varistors—Preparation of nano and micro sized powders by mechanical methods for low and high voltage varistors [PDF]

, 2008
ZnO-Bi2O3-Sb2O3 varistors are as essential today as they have been since their discovery five decades ago. Their role is to protect other electronic components against oncoming surges of electrons and survive.
Kelleher, Maura
core   +3 more sources

Thermal behaviour analysis in a porcelain-housed ZnO surge arrester by computer simulations and thermography

High Voltage, 2019
In this article, an analysis of heat transfer in a porcelain-housed ZnO surge arrester is presented. Due to the fact that ZnO-based surge arresters are key components for protection and reliability of electrical systems, it is necessary to seek ...
Arthur F. Andrade, Edson G. Costa, Edson G. Costa, Josué M.B. Fernandes, Helem M.M. Alves, Cícero R.C. Amorim Filho   +5 more
doaj   +1 more source

Microstructural and nonohmic properties of ZnO.Pr6O11 CoO polycrystalline system

Materials Research, 2010
The microstructure and electrical properties of varistors composed of (95-x) ZnO + x Pr6O11 + 5 CoO (ZPC), (x = 0.1, 0.5 and 1.0) and sintered at 1300 and 1350 °C, were investigated. According to X-ray diffraction, several phases (ZnO, Pr2O3 and Pr2CoO4)
Miguel Angel Ramírez, José Francisco Fernández, José de Frutos, Paulo Roberto Bueno, Elson Longo, José Arana Varela   +5 more
doaj   +1 more source

Current limiting and negative differential resistance in indium oxide based ceramics [PDF]

, 2009
Indium oxide based ceramics with bismuth oxide addition were sintered in air in the temperature range 800-1300 ºC. Current-voltage characteristics of In2O3-Bi2O3 ceramics sintered at different temperatures are weakly nonlinear.
Bondarchuk, AN, Jones, Benjamin, A.B. Glot, A.N. Bondarchuk, Jones, BJ, Bondarchuk, A N, Glot, AB, R. Bulpett, Verma, N, Bulpett, R, Mazurik, SV, Mazurik, S V, B.J. Jones, Jones, B J, N. Verma, Mazurik, S.V., S.V. Mazurik, Glot, A B, Glot, A.B., Bondarchuk, A.N.   +19 more
core   +1 more source

Leakage Current Measurements of Surge Arresters

Energies, 2023
The paper presents the methods of assessing the technical condition of varistor surge arresters used in laboratory tests and in operation—performed without disconnecting the arresters from the network.
Marek Olesz, Leszek S. Litzbarski, Grzegorz Redlarski   +2 more
doaj   +1 more source

Revisiting the effects of Co(2)O(3) on multiscale defect structures and relevant electrical properties in ZnO varistors

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, Yao Wang, Kangning Wu, Lei Zhang, Lei Zhang, Xia Zhao, Ying Lin, Jianying Li   +7 more
doaj   +1 more source