Results 191 to 200 of about 10,701 (258)
Some of the next articles are maybe not open access.
, 2021
The possibility of eliminating of electrically inactive areas from varistor body with maintaining varistor electrical parameters can be achieved by modifying Bi2O3 in such a way that a Bi-rich layer which surrounds the grains of ZnO is as thin as ...
J. Warycha, W. Mielcarek, G. Lesiuk
semanticscholar +1 more source
The possibility of eliminating of electrically inactive areas from varistor body with maintaining varistor electrical parameters can be achieved by modifying Bi2O3 in such a way that a Bi-rich layer which surrounds the grains of ZnO is as thin as ...
J. Warycha, W. Mielcarek, G. Lesiuk
semanticscholar +1 more source
Fine-grained SnO2 varistors prepared by microwave sintering for ultra-high voltage applications
Materials Letters, 2018In this research, fine-grained SnO 2 -based varistors with a simple microstructure and the mean grain size of 0.8 µm were obtained by the microwave sintering method.
Mohammad Maleki Shahraki +1 more
exaly +2 more sources
Journal of the American Ceramic Society, 1999
The development of varistor ceramics is reviewed with an emphasis on ZnO‐based varistors formed by liquid‐phase sintering. Particular attention is given to the effects of microstructural disorder on the properties of varistors and to the different modes of failure that can occur.
openaire +1 more source
The development of varistor ceramics is reviewed with an emphasis on ZnO‐based varistors formed by liquid‐phase sintering. Particular attention is given to the effects of microstructural disorder on the properties of varistors and to the different modes of failure that can occur.
openaire +1 more source
, 2020
In present study, impact of CaO doping on microstructure and phase electrical properties of a ZnO varistor is being reported. The doped ZnO nanopowders were prepared by solution combustion followed by conventional sintering.
K. Hembram +4 more
semanticscholar +1 more source
In present study, impact of CaO doping on microstructure and phase electrical properties of a ZnO varistor is being reported. The doped ZnO nanopowders were prepared by solution combustion followed by conventional sintering.
K. Hembram +4 more
semanticscholar +1 more source
Microchemistry of ZnO Varistors
Proceedings, annual meeting, Electron Microscopy Society of America, 1992ZnO varistors are made by mixing semiconducting ZnO powder with powders of other metal oxides e.g. Bi2O3, Sb2O3, CoO, MnO2, NiO, Cr2O3, SiO2 etc., followed by conventional pressing and sintering. The non-linear I-V characteristics of ZnO varistors result from the unique properties that the grain boundaries acquire as a result of dopant distribution ...
K. K. Soni +4 more
openaire +1 more source
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference, 2002
Two shapes of interdigitated planar varistors were made using thick-film technology on alumina substrates. These varistor were based on ZnO paste. The distance between varistor electrodes were changed from 0.2 to 1.91 mm, and the total length of the electrodes from 49 to 230 mm.
T.D. Grozdic +3 more
openaire +1 more source
Two shapes of interdigitated planar varistors were made using thick-film technology on alumina substrates. These varistor were based on ZnO paste. The distance between varistor electrodes were changed from 0.2 to 1.91 mm, and the total length of the electrodes from 49 to 230 mm.
T.D. Grozdic +3 more
openaire +1 more source
IEEE transactions on electromagnetic compatibility (Print), 2020
Voltage and current surges originated by lightning is one of the most common cause of degradation, upset, failure, and/or damage of susceptible equipment in low-voltage (LV) ac power installations.
V. Radulovic, Z. Miljanic
semanticscholar +1 more source
Voltage and current surges originated by lightning is one of the most common cause of degradation, upset, failure, and/or damage of susceptible equipment in low-voltage (LV) ac power installations.
V. Radulovic, Z. Miljanic
semanticscholar +1 more source
Sintering effect on varistor properties and degradation behavior of ZVMB varistor ceramics
Journal of Materials Science: Materials in Electronics, 2017ZnO–V2O5–Mn3O4–Bi2O3 (ZVMB) varistor ceramics were sintered at a low temperature range of 800–875 °C, and the microstructure, electrical properties, dielectric characteristics, and DC-accelerated aging behavior were systematically investigated. Analysis of the microstructure indicated that the average grain size increased from 3.8 to 6.4 µm with the ...
openaire +1 more source
[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials, 2002
The frequency characteristics of the capacity and the dissipation factor of a ceramic ring varistor have been measured in the range from 10 kHz to 1 MHz. From the measurements, the equivalent circuit was determined, considering the internal structure of the ceramic ring varistor.
M. Suzuki +3 more
openaire +1 more source
The frequency characteristics of the capacity and the dissipation factor of a ceramic ring varistor have been measured in the range from 10 kHz to 1 MHz. From the measurements, the equivalent circuit was determined, considering the internal structure of the ceramic ring varistor.
M. Suzuki +3 more
openaire +1 more source