Results 11 to 20 of about 280 (129)
Revista EIASe reporta un estudio comparativo de productos existentes en el mercado, para definir criterios con respecto a los cuales se puedan comparar muestras obtenidas en investigación de varistores o definir estándares de control de calidad para consumidores ...
Eugenio Giraldo +2 more
doaj +1 more source
Desenvolvimento de varistores à base de SnO2 para aplicação em redes de alta tensão Development of SnO2-based varistors for high voltage application [PDF]
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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Electrical and microstructural properties of microwave sintered SnO2-based varistors Propriedades elétricas e microestruturais de varistores à base de SnO2 sinterizados por microondas [PDF]
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 +2 more sources
Desarrollo y caracterización de varistores de óxido de cinc
Boletín de la Sociedad Española de Cerámica y Vidrio, 2001 In this paper the electric behaviour and other structural, physicochemical and micro structural characteristics of four commercial varistors of different makers were studied and compared with other three developed prototypes.
Attolini, P. +2 more
doaj +1 more source
Boletín de la Sociedad Española de Cerámica y Vidrio, 2012 Typically Titanium oxide is added to the formulation of Bi2O3-doped ZnO based varistors to enhance the growth of ZnO grains, thus allowing their application in low voltage devices. However its incorporation to formulation based on the ZnOBi2O3-Sb2O3 (ZBS
Fernández-Hevia, D. +4 more
doaj +2 more sources
Características microestructurales de varistores del sistema ZnO-BaO-P2O5
Boletín de la Sociedad Española de Cerámica y Vidrio, 1999 Ceramic materials based on the system ZnO-BaO show a great potential for varistor applications. However, the BaO rich phase located at the grain boundaries shows high solubility in water which causes severe damage of the materials.
Fernández, J. F. +5 more
doaj +1 more source
Efecto de la relación área-volumen en la sinterización de varistores cerámicos basados en ZnO-Bi2O3
Boletín de la Sociedad Española de Cerámica y Vidrio, 2002 Sintering of ceramic varistors based on the system ZnO-Bi2O3-Sb2O3 takes place at 1150-1200ºC in the presence of a Bi-rich liquid phase which forms at 700-800ºC, depending on the exact material composition.
Caballero, A. C. +3 more
doaj +1 more source
Métodos químicos para obtener varistores basados en SnO2
Boletín de la Sociedad Española de Cerámica y Vidrio, 2006 Synthesis of SnO2 ceramic powders was made by coprecipitation method and polymeric precursor method (Pechini) to obtain Sn-Co-Nb-Ti-Al varistor systems.
Rodríguez-Páez, J. E. +2 more
doaj +1 more source
Cerâmica Eletrônica: Grupo LIEC - UFSCar
Cerâmica, 1999 De modo resumido, apresentar-se-á, trabalhos relacionados ao Grupo de Pesquisa em Materiais Cerâmicos do LIEC/ UFSCar. Serão enfatizado os resultados obtidos em varistores de óxido de estanho, cerâmica eletrônica completamente nova e os dados de titanato
Longo E. +5 more
doaj +1 more source
Boletín de la Sociedad Española de Cerámica y Vidrio, 2001 The electrical properties of ceramic varistors based on the ZnO-Bi2O3-Sb2O3 system are related to the complexity of its polycrystalline microstructure.
Peiteado, M. +3 more
doaj +1 more source