Results 71 to 80 of about 280 (129)
Stability of Zinc Oxide Varistors
, 2014 Ceramic varistors based on ZnO, Bi2O3, Sb2O3, MnO and Co3O4 were prepared by the mixed oxide route. After milling the powders, disc shaped samples were pressed and sintered for 2 hours at temperatures in the range 950°C to 1250°C. Products were characterised in terms of phase development and microstructure by X-ray diffraction and scanning electron ...
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Síntesis de nanopartículas de SnO2 y su uso en la conformación de varistores
Revista Facultad de Ingeniería Universidad de Antioquia, 2007 Adolfo Alfredo Mosquera Lozano +2 more
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Análisis de la microestructura de varistores de ZnO: interfases funcionales y su respuesta eléctrica
Boletín de la Sociedad Española de Cerámica y Vidrio, 2009 Iglesias Vega, Yolanda
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Breakdown Characteristics of Varistor Ceramics
, 2019 Jianying Li, Kangning Wu, Yuwei Huang
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Varistores à base de WO3 - revisão [PDF]
Revista Materia, 2016 Varistores são elementos que fazem parte do sistema de transmissão e distribuição de energia elétrica ou de instalações elétricas especiais. Estes dispositivos são amplamente produzidos variando a escala, dependendo de sua aplicação, como dispositivos de
Jomar Sales Vasconcelos, E Longo
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Parámetros de procesamiento para varistores basados en ZnO preparados por serigrafía
Boletin De La Sociedad Espanola De Ceramica Y Vidrio, 2006 [EN] Thick film varistors based on the ZnO-Bi2O3-Sb2O3 system have been prepared by screen printing on dense alumina substrates. Different processing parameters like the paste viscosity, burn out and sintering cycles, green and sintered thickness, have
Marco Peiteado +2 more
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Varistor piezotronics: Mechanically tuned conductivity in varistors
Journal of Applied Physics, 2015The piezoelectric effect of ZnO has been investigated recently with the goal to modify metal/semiconductor Schottky-barriers and p-n-junctions by application of mechanical stress. This research area called “piezotronics” is so far focused on nano structured ZnO wires.
Raschid Baraki +5 more
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Degradation phenomena of ZnO varistors
Physica Status Solidi (a), 1981The dc degradation behaviour of ZnO varistors as a function of the variables current, temperature, and time is investigated. The degradation rate is phenomenologically presented by an equation reflecting the observed aging behaviour in dependence on the influencing variables.
W. Moldenhauer +4 more
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Impulse current withstanding capability of ZnO varistors with influence of varistor size
IEEJ Transactions on Electrical and Electronic Engineering, 2019Through injecting 8/20 and 30/60 μs impulse currents to five kinds of ZnO varistors, the influence of the varistor size on the single impulse current withstanding capability of a ZnO varistor is investigated in this article. A comprehensive damage criterion of a varistor consisting of three aspects, namely, mechanical failure by visual inspection ...
Jianguo Wang +5 more
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Journal of the American Ceramic Society, 1987
The varistor properties were examined in porous ZnO. The sample used contained no dopants such as Bi 2 O 3 or Pr 6 O 11 , which are usually considered to be useful in ...
Satoru Fujitsu +2 more
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The varistor properties were examined in porous ZnO. The sample used contained no dopants such as Bi 2 O 3 or Pr 6 O 11 , which are usually considered to be useful in ...
Satoru Fujitsu +2 more
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