Results 31 to 40 of about 4,953 (161)
Effect of Cr2O3 on properties of ZnO-Bi2O3 based high-voltage varistor ceramics
Cailiao gongchengZnO-Bi2O3-Co2O3-NiO-Mn3O4-SiO2-Cr2O3 varistor ceramics were prepared by solid-phase sintering method.The effects of different doping amounts of Cr2O3 on the microstructure and electrical properties of ZnO varistor ceramics were investigated, and the ...
GUI Yanghai +5 more
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Microstructure and Nonohmic Properties of SnO2-Ta2O5-ZnO System Doped with ZrO2
The Scientific World Journal, 2014 The microstructure and nonohmic properties of SnO2-Ta2O5-ZnO varistor system doped with different amounts of ZrO2 (0–2.0 mol%) were investigated. The proposed samples were sintered at 1400°C for 2 h with conventional ceramic processing method.
Xiuli Fu +3 more
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Random manifolds in non-linear resistor networks: Applications to varistors and superconductors
, 2001 We show that current localization in polycrystalline varistors occurs on paths which are, usually, in the universality class of the directed polymer in a random medium.
A Donev +14 more
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Electrical properties of ZnO varistors prepared by direct mixing of constituent phases [PDF]
, 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 ...
Branković G., Branković Z., Žunić M.
core +1 more source
Enhanced dielectric response and non-Ohmic properties of Ge-doped CaTiO3/CaCu3Ti4O12
Journal of Asian Ceramic Societies, 2022 We present a method for increasing the dielectric constant of CaTiO3/CaCu3Ti4O12 (CTO/CCTO) composites and retaining a low-loss tangent (tanδ) by doping with Ge dopant.
Jirata Prachamon +7 more
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Measuring the energy handling capability of metal oxide varistors [PDF]
, 2001 Metal oxide varistors are widely used in many power electronics circuits to protect against transient over voltages. Certain applications are very demanding on the energy handling capability of the varistors.
Ahmed, M. M. R. +3 more
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Polarity engineering in polycrystalline ZnO by inversion boundaries [PDF]
, 2014 Two distinctive polarity-engineered microstructures were obtained in polycrystalline ZnO ceramics by inducing two different types of inversion boundaries (IBs) inside individual grains to examine the effect of the different polarities on the varistor ...
Jeon, Sang-Yun +6 more
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Cerâmica, 2006 Varistores à base de SnO2 foram preparados pelo processo convencional de mistura de óxidos. As amostras foram sinterizadas a 1250 °C por 2 h. Os difratogramas obtidos por difração de raios X e as análises por microscopia eletrônica de varredura ...
M. M. Oliveira +6 more
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Análisis Matemático de la Supresión de Impulsos Tipo Atmosférico en Sistemas de Distribución
Ingenio, 2021 Se realizó el estudio y análisis de la supresión de impulsos tipo atmosférico al pararrayo de un Sistema de Distribución Eléctrica, basado en la comparación de resultados teóricos desarrollados con el software Matlab – Simulink y los experimentales ...
Josue Quimiz +4 more
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