Results 51 to 60 of about 2,070 (218)
Structure of a Novel Spinel Li0.5Zn5/3Sb2.5/3O4 by Neutron and Synchrotron Diffraction Analysis
Crystals, 2017 Zn7/3Sb2/3O4 is a secondary phase in ZnO-based varistors. Acceptor impurities, such as Li+, increase the resistivity. This effect is produced by a modification of the grain boundary barriers.
José Alfredo Marín-Romero +4 more
doaj +1 more source
Electrical properties of ZnO varistors prepared by direct mixing of constituent phases [PDF]
Science of Sintering, 2006 Varistor samples containing different amounts of constituent phases were prepared by direct mixing of constituent phases. Detailed electrical characterization was performed to explain the influence of minor phases (spinel and intergranular phases) on ...
Žunić M., Branković Z., Branković G.
doaj +1 more source
Open Ceramics, 2021 Zinc oxide varistors are among the most important surge arresters. The current-voltage (I–V) behaviour of these devices can be approximated by a model of electrical networks of grain boundaries arranged in 3D space, where nonlinear resistors mimic the ...
Benjamin Kaufmann +4 more
doaj +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract Electromagnetic sounding coupled with experimental measurements of electrical conductivity (EC) can provide valuable constraints on the thermochemical state of Earth's lower mantle. Here, we report a new set of experimentally determined EC values of pyrolite, a candidate composition of the lower mantle, between 25 and 80 GPa at room ...
Charlotte Trubowitz +10 more
wiley +1 more source
Data-Driven Matching Methodology for Enhanced MOV Current Sharing in DC Solid-State Circuit Breakers
IEEE Open Journal of the Industrial Electronics SocietyMetal oxide varistors (MOVs) are widely used as the energy absorption branch in DC solid-state circuit breakers (SSCBs), but reliable operation requires predictable current and energy sharing among paralleled MOV discs. This article proposes a low-effort,
Navid Hadifar +3 more
doaj +1 more source
The Role of Polypyrrole in Electrical Properties of ZnO-Polymer Composite Varistors [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2017 Composite films on the base of ZnO with different weight percentages of polypyrrole have been prepared using the hot pressing method and their current-voltage characteristics have been studied. Results show that the films have nonlinear varistor behavior
Nasim Asaadi +3 more
doaj
Synthesis of SnO2 nanoparticles and their use in the fabrication of varistors
Revista Facultad de Ingeniería Universidad de Antioquia, 2014 SnO2 nanoparticles doped with TiO2, CoO, Nb2O3 and Al2O3 were obtained in this work using the methods of coprecipitation and polymeric precursor. X Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM) were used to characterize the ceramic ...
Adolfo Alfredo Mosquera-Lozano +2 more
doaj +1 more source
Metastable Barrier Voltage in ZnO Varistors
, 1981 A 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.
Tapan K. Gupta +2 more
core +1 more source
Changes in varistors properties after radial field test [PDF]
, 2008 ZnO varistors are used in commercial surge arresters in high voltage application in the area of power engineering. Metal oxide arresters (MOA) operated in polluted areas may be subjected to an environmental stresses causing an internal partial discharges
Zakrzewski, J +3 more
core +1 more source
High Temperature Materials and ProcessesZnO varistors are widely used in the field of lightning protection. After being struck by lightning, ZnO varistors absorb heat, which can lead to temperature rise and even damage, posing a serious safety threat to electrical safety.
Li Chunying, Zhang Chunlong, Lv Qing
doaj +1 more source