Results 71 to 80 of about 2,670,785 (225)

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

Abnormal Expansion Along the Synthesis of Zinc Stannate: A Way for Porous Ceramics Without Addition of Pore Generators

Journal of the American Ceramic Society, Volume 109, Issue 2, February 2026.
The abnormal expansion associated with the simultaneous synthesis and sintering of Zn2SnO4 from ZnO and SnO2 is due to the reaction mechanism and correlated with the conversion. This phenomenon opens the way to manufacture porous ceramics without the addition of pore generators, simplifying the process, and especially the thermal treatment.
María José Orts, Eugeni Cañas, Valentín Pérez‐Herranz, Sergio Mestre   +3 more
wiley   +1 more source

Computer Aided Model for a Low Voltage Varistor with Increased Thermal Stability [PDF]

, 2019
Metal Oxide Varistors are a very common power electronic device, applied for efficient overvoltage protection at any voltage level. This piece of equipment has a high non-linear current response function of the applied voltage, and, it provides a ...
Frigura-Iliasa, Mihaela; Politehnica University Timisoara, Olariu, Adrian F.; POLITEHNICA University of Timisoara, Dolga, Lia; Politehnica University Timisoara, Romania, Filipescu, Hannelore; Politehnica University Timisoara, Frigura-Iliasa, Flaviu M.; National Institute for Research and Development in Electrochemistry and Condensed Matter – LERF, Balcu, Florin I.; National Institute for Research and Development in Electrochemistry and Condensed Matter – LERF   +5 more
core   +1 more source

Computational Model and Experimental Validation of the Influence of Grain‐Boundary Parameters on the Electrical Performance of Arrester Varistor

International Journal of Ceramic Engineering &Science, Volume 8, Issue 1, January 2026.
This paper presents a calculation model for the nonlinear characteristics of varistors based on a basic conductive mechanism, and it has been verified through experiments. The mechanism of the barrier's effect on electrical performance has been obtained.
Zhengzheng Fu, Zongxi Zhang, Songhai Fan, Tao Cui, Donghui Luo, Pengfei Meng, Yue Yin, Jingke Guo   +7 more
wiley   +1 more source

Modelling of Metal Oxide Surge Arresters in Simulation Software DYNAST [PDF]

, 2020
This paper describes the possibilities for mathematical modelling of gap-less surge arresters in simulation software DYNAST. This tool does not belong to standard modelling softwares in the field of electric power engineering.
Jan Veleba, Vladislav Síťař, Veleba, Jan, Síťař, Vladislav   +3 more
core   +1 more source

An Adaptive Pulse‐Width Driving Method for Ultra‐Fast Mechanical Switches in DC Interruption Applications

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This study introduces an adaptive speed control strategy for fast mechanical switches using an IGBT fully controlled driving circuit. The approach combines PWM‐based current shaping with an intelligent secant algorithm to regulate opening speed in real time without hardware changes.
Wei Li, Feiyang Yu, Xiangyu Zhang, Tianpeng He, Lei Qi   +4 more
wiley   +1 more source

A Device for Investigating the AC Characteristics of Metal Oxide Varistors

IET Power Electronics
In recent years, the AC characteristics of metal oxide varistors have attracted growing research interest. This study presents an insulated‐gate bipolar transistor‐based device designed to address the limitations of existing power supply systems, which ...
Xinyan Xiao, Lanjun Yang, Yonggang Yue
doaj   +1 more source

Comparative Assessment of Lightning Overvoltages at Transformer and Hydrogenerator Terminals Under Nonideal Station‐Side Metal‐Oxide Arrester Conditions

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This study comparatively assesses lightning‐overvoltage propagation to the transformer high‐voltage terminal and hydrogenerator busbar of a hydropower plant under prescribed lightning‐current injection and selected nonideal conditions of a station‐side metal‐oxide arrester.
Jiachen Zhang, Bo Zhang, Wang Guo, Chenen Sun, Zeyu Zhao, Yuanyang Liu, Jichun Yi, Wei Li, Yanliang Qiu, Guanjun Zhang   +9 more
wiley   +1 more source

The Microstructural Location of the Intergranular Metal Oxide Phase in a Zinc Oxide Varistor [PDF]

, 1977
High resolution electron microscopy of a commercial ZnO based varistor reveals that the Bi-rich intergranular phase is found at all three and four grain junctions and that the majority of ZnO grains are not surrounded by an oxide barrier film as hitherto
Clarke, D. E, Clarke, D. E.
core  

Porosity through reduction in metal oxides [PDF]

, 2008
Routes to porous materials with nanoscale dimensions have been investigated. In the first example presented, porous manganese oxide has been prepared by leaching Ni metal from a nickel-manganese oxide precursor via reduction.
Seshadri, R., Shoemaker, D.P., Corr, S.A.   +2 more
core   +1 more source