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 +3 more
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The Grain Growth Control of ZnO-V2O5 Based Varistors by PrMnO3 Addition [PDF]
Micromachines, 2022 In this study, the grain growth behaviour of ZnO-V2O5-based ceramics with 0.25–0.75 mol% additions of PrMnO3 was systematically investigated during sintering from 850 °C to 925 °C.
Maofeng Xu +8 more
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Optimization of technological processes in the manufacturability of varistors based on recycled ZnO product, with emphasis on environmental sustainability [PDF]
HeliyonThe main objective described in this paper is the optimization of technological parameters in the production of varistors based on recycled zinc oxide (ZnO).
Pavol Liptai +4 more
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Tuneable conductivity at extreme electric fields in ZnO tetrapod-silicone composites for high-voltage power cable insulation [PDF]
Scientific Reports, 2022 Resistive Field Grading Materials (RFGM) are used in critical regions in the electrical insulation system of high-voltage direct-current cable systems. Here, we describe a novel type of RFGM, based on a percolated network of zinc oxide (ZnO) tetrapods in
Helena Greijer +9 more
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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 +3 more
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MRS Proceedings, 1981 The theory of ZnO varistors has evolved along with the increasingly detailed experimental description [1-2]. The extreme nonlinearity in the currentvoltage curves naturally led the early investigators to suggest the well-known nonlinear mechanisms, such as space-charge limited currents or electron tunneling. Later experiments made these first proposals
G.D. Mahan
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Electrical degradation of double-Schottky barrier in ZnO varistors
AIP Advances, 2016 Researches on electrical degradation of double-Schottky barrier in ZnO varistors are reviewed, aimed at the constitution of a full picture of universal degradation mechanism within the perspective of defect.
Jinliang He, Chenlu Cheng, Jun Hu
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International Journal of Ceramic Engineering & ScienceFrom a materials‐computation perspective, this study integrates the electron‐excitation model of double Schottky‐barriers with a Voronoi network to characterize the microscopic electrical and structural properties of ZnO varistors.
Zhengzheng Fu +7 more
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Large internal stress induced nonlinear current-voltage behavior in nanodiamond strengthened ZnO ceramics [PDF]
Nature CommunicationsThe modulation of the electrostatic potential barrier at grain boundaries determines the performance of many ceramic-based electronics such as varistors.
Peng Yan +7 more
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Metastable Barrier Voltage in ZnO Varistors
MRS Proceedings, 1981 ABSTRACTA reversible change in barrier voltage is observed in assintered ZnO varistors upon application and removal of the applied voltage. This is attributed to a metastable component in the grain boundary Schottky barriers. Varistors show improved stability when the metastable component is removed or fixed by heat treatment.
Tapan K. Gupta +2 more
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