Results 71 to 80 of about 135,374 (222)

Electron paramagnetic resonance study of ZnO varistor material

, 2014
Matsuoka-type zinc oxide (ZnO) varistor material was synthesized using a conventional solid-state reaction method. X-band electron paramagnetic resonance (EPR) data revealed that Mn ions substitute in the ZnO lattice with a 2+ paramagnetic state. Co ions
Zierep, Paul, Granzow, Torsten, Erdem, Emre, Weber, Stefan, Baraki, Raschid   +4 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

Stability of ZnO-Pr6o11-Cr2O3 varistor ceramics against electrical degradation [PDF]

, 2016
The vulnerability of varistor ceramics to electrical degradation during operation not only affects their nonlinear properties but also leads to shortening of device’s lifetime by increasing the risk of failures including melting, fire or even explosions.
Rahman, Md. Mahmudur, Zakaria, Azmi, Mohd Ghazali, Mohd Sabri, Hashim, Mansor, Wan Abdullah, Wan Rafizah   +4 more
core   +1 more source

Enhancement of non-ohmic properties of CoO DopeD ZnO varistor ceramics using Soda Lime Silica (SLS) glass [PDF]

, 2020
ZnO-SLS-CoO (ZSC) based varistor ceramics were prepared at a high sintering temperature of 1100 ºC via the conventional solid-state method. The effect of SLS glass on the electrical properties was studied at the different concentration of SLS glass ...
Ismail, Nur Quratul Aini, Sa'at, Nor Kamilah, Mohd Zaid, Mohd Hafiz   +2 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

Estudo da adsorção de dispersante à base de poliacrilato em um sistema varistor comercial: caracterização físico-química Study of polyacrylate adsorption in a commercial varistor system: characterization of the physical-chemistry properties

Cerâmica, 2005
Um dos grandes desafios no processamento cerâmico é a obtenção de dispersões de partículas estáveis e homogêneas contendo materiais com diferentes características físicas e químicas, como densidade, área de superfície específica, distribuição de tamanho ...
S. L. M. Brito, D. Gouvêa, R. Ganzella
doaj   +1 more source

Impact of impulse current waveforms on the degradation rate of zinc oxide varistor valves

Zhejiang dianli
To elucidate the mechanisms by which different impulse current waveforms impact the degradation rate of electrical performance of zinc oxide （ZnO） varistor valves， and to explore a unified characterization method for the degradation states along with its
WU Yuanzhi, HAN Yongxia, LIAO Zhiming, LI Xu, HU Taishan, HU Shangmao, DING Leilei   +6 more
doaj   +1 more source

Control microestructural en varistores cerámicos basados en el sistema ZnO-Bi₂O₃-Sb₂O₃ dopados con TiO₂

Boletín de la Sociedad Española de Cerámica y Vidrio, 2012
Typically Titanium oxide is added to the formulation of Bi2O3-doped ZnO based varistors to enhance the growth of ZnO grains, thus allowing their application in low voltage devices. However its incorporation to formulation based on the ZnOBi2O3-Sb2O3 (ZBS
Fernández-Hevia, D., Reyes, Y., Gallego, B., Cruz, A. M., Peiteado, M.   +4 more
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

Determining the effect of bismuth oxide on the microstructure and electrical response of cold‐sintered ZnO varistors

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Microstructure homogeneity and grain size reduction are needed to ensure the current uniformity and reliability required in metal oxide varistors for DC circuit breakers. Cold sintering (CS)–a low‐temperature digestive liquid and high‐pressure densification process–has previously shown reduced grain growth, but it is not clear how the lower ...
Kayla Y. Chuong, Yang Liu, Thomas Forbes, Marshall B. Frye, Lukas Graber, Lauren M. Garten   +5 more
wiley   +1 more source