Results 21 to 30 of about 215,655 (219)

An Experimental Study of the Failure Mode of ZnO Varistors Under Multiple Lightning Strokes

Electronics (Switzerland), 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. Scanning electron microscopy (SEM) and X-ray
Hongyan Xing, Chunlong Zhang, Pengfei Li   +2 more
exaly   +2 more sources

Large internal stress induced nonlinear current-voltage behavior in nanodiamond strengthened ZnO ceramics. [PDF]

Nat Commun
The modulation of the electrostatic potential barrier at grain boundaries determines the performance of many ceramic-based electronics such as varistors.
Yan P, Si M, Liu Y, Ren Y, Ding Q, Jiang W, Fan Y, Jiang W.   +7 more
europepmc   +2 more sources

Effect of the sintering temperature on the electrical properties of Y–Al‐doped ZnO varistors

International Journal of Ceramic Engineering &Science, Volume 7, Issue 1, January 2025.
The effect mechanism of sintering temperature on the electrical properties of Y–Al‐doped ZnO varistors was revealed in this paper. It not only enriches the theoretical basis for the performance regulation of ZnO varistors but also provides a scientific basis for their application under higher requirements.
Lei Wang, Hang Zhang, Kexin Zhang, Yubo Shen, Limin Qu, Yue Yin, Pengfei Meng, Jingke Guo   +7 more
wiley   +2 more sources

Influence of Y–Bi–Co oxide doping on electrical performance of ZnO varistors based on simulation analysis

International Journal of Ceramic Engineering &Science, Volume 7, Issue 1, January 2025.
Simulation methods were used to help reveal the effect mechanism of Y, Bi, and Co dopants on ZnO varistors. It provides an important theoretical basis for the development of high‐performance varistor. Abstract ZnO varistors doped with Y2O3${\rm Y}_2{\rm O}_3$, Bi2O3${\rm Bi}_2{\rm O}_3$, and Co2O3${\rm Co}_2{\rm O}_3$ were analyzed for electrical ...
Zhengzheng Fu, Zongxi Zhang, Songhai Fan, Tao Cui, Donghui Luo, Yue Yin, Pengfei Meng, Jingke Guo   +7 more
wiley   +2 more sources

Percolation effects in dc degradation of ZnO varistors [PDF]

Journal of Advanced Dielectrics, 2015
For quantitative estimation of the degree of electrical disorder (electrical inhomogeneity) in ZnO varistor ceramics caused by a variation in the barrier height at different grain boundaries in a sample, the comparison of threshold electric fields ...
A. S. Tonkoshkur, A. B. Glot, A. V. Ivanchenko   +2 more
doaj   +2 more sources

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, J. Wańkowicz, H. Śmietanka, P. Ranachowski, Z. Ranachowski, S. Kudela Jr, M. Aleksiejuk   +6 more
doaj   +1 more source

Effect of Zn7Sb2O12 pre-synthesis on microstructure and properties of ZnO varistor ceramics

AIP Advances, 2022
In this work, the Zn7Sb2O12 spinel phase is pre-synthesized at 980, 1000, 1020, 1040, and 1060 °C by mixing ZnO and Sb2O3 in a molar ratio of 7:1. ZnO varistors are prepared by replacing Sb2O3 with the Zn7Sb2O12 spinel phase.
Fei Zhu, Chang Liu, Jianlin Li, Deyi Zheng, Chi Pang, Zihao Fei   +5 more
doaj   +1 more source

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

Microstructure and Degree of Degradation of ZnO Varistors in Surge Arresters Due to Operation [PDF]

Archives of Metallurgy and Materials, 2018
The paper presents the test results for the microstructure of ZnO varistors comprising high voltage gapless surge arresters. The tests were performed on varistors produced in different periods and by various manufacturers.
P. Papliński, J. Wańkowicz, P. Ranachowski, Z. Ranachowski   +3 more
doaj   +1 more source

The role of oxide optimization in improving the electrical properties of ZnO varistors

Journal of materials science. Materials in electronics, 2021
Zinc oxide-based varistors are nonlinear voltage-dependent ceramic resistors used to suppress and limit transient voltage surges. However, due to their structural inhomogeneity, current concentration may come into existence, which causes thermal stress ...
Fuad Alhaj Omar
semanticscholar   +1 more source