Results 31 to 40 of about 1,546 (174)
International Journal of Applied Ceramic Technology, Volume 23, Issue 4, August 2026.ABSTRACT This study examines the impact of aging on the electrical and structural properties of positive temperature coefficient of resistance (PTCR) ceramics. The presented study introduces a correlative scanning electron microscopy (SEM)/conductive atomic force microscopy (C‐AFM) approach enabling repeated, site‐specific characterization of ...
Kryštof Koller +4 more
wiley +1 more source
Analysis of MOA Damage Mechanism Under Multiple Strokes
Applied SciencesAccident records from the actual operation of metal oxide arresters (MOAs) indicate that even MOA products that have passed standard tests still suffer from frequent damage.
Tao Yuan +3 more
doaj +1 more source
Cerâmica, 2012 An investigation was made of the microstructural and electrical properties of SnO2-based varistors microwave sintered at 1200 ºC, applying a heating rate of 120 ºC/min and treatment times of 10, 20, 30, 40, 50 and 60 min.
P. S. Furtado +5 more
doaj +1 more source
Performance and Mechanism Research on ZnO Varistor Ceramics Prepared by Microwave Sintering
International Journal of Ceramic Engineering &Science, Volume 8, Issue 4, July 2026.Microwave sintering yields superior electrical performance of ZnO varistor ceramics versus conventional sintering, clarifies its grain boundary defect regulation mechanism, and provides a low‐energy, high‐efficiency preparation strategy. ABSTRACT To solve the problems of high sintering temperature, uneven grain growth, and limited electrical property ...
Zhiyao Fu +3 more
wiley +1 more source
Nature and Characteristics of a Voltage-Biased Varistor and its Embedded Transistor
IEEE Journal of the Electron Devices Society, 2015 An unorthodox approach for producing simple and yet practical transistors based on ceramic platforms is discussed in this paper. To achieve this, we modify the original nonlinear current-voltage (I-V) characteristics of a varistor by superimposing a ...
Raghvendra K. Pandey +2 more
doaj +1 more source
High Voltage, Volume 11, Issue 3, Page 738-750, June 2026.ABSTRACT High altitude electromagnetic pulse (HEMP), as a steep slope and high amplitude instantaneous energy shock, has stronger coupling and greater destructive power, which can easily cause the secondary control device of the substation to malfunction.
Long Jin +5 more
wiley +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
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
European Journal of Applied Mathematics, 2016 A three-dimensional model of the varistor device is proposed. The thermal and electric conductivity of the material are taken to depend, in addition to the electric potential, on the temperature. Two theorems of existence and uniqueness of solutions for the boundary-value problem which determine the potential and the temperature inside the device are ...
openaire +1 more source