Results 21 to 30 of about 88 (88)

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., Leite E. R., Paskocimas C. A., Varela J. A., Zaghete M. A., Cilense M.   +5 more
doaj  

Degradación y recuperación de varistores de ZnO

Boletín de la Sociedad Española de Cerámica y Vidrio, 2006
In the present work it was studied the main aspect that influences on degradation and physical-chemical properties at grainboundary region of metal oxide varistors and its consequences on microstructure and nonohmic electric properties.
Ramírez, M. A., Bueno, P. R., Valera, J. A., Márquez, M. A.   +3 more
doaj  

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., Aglietti, E. F., Scian, A. N.   +2 more
doaj  

Silicon carbide varistors

Transformers Magazine, 2022
Current transformers are used to monitor large currents within power grids and power stations, producing a current in the device’s secondary winding that is proportional to the current flowing in its primary winding. Varistors are used to protect current transformers by preventing an open circuit condition if the secondary is disconnected, which can ...
Galvin, Dr. Tom, Coll, Dominic
openaire   +2 more sources

Processing parameters for ZnO-based thick film varistors obtained by screen printing

Boletín de la Sociedad Española de Cerámica y Vidrio, 2006
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 been ...
de la Rubia, M. A., Peiteado, M., Fernández, J. F., Caballero, A. C., de Frutos, J., Holc, J., Drnovsek, S., Kuscer, D., Macek, S., Kosec, M.   +9 more
doaj  

ESTUDIO DE CARACTERÍSTICAS CRISTALOGRÁFICAS, MORFOLÓGICAS, COMPOSICIONALES Y ELÉCTRICAS DE VARISTORES COMERCIALES

Revista EIA
Se 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, Guillermo L Miranda, Pablo Abad   +2 more
doaj  

Análisis de varistores mediante STM y STS

Boletín de la Sociedad Española de Cerámica y Vidrio, 2002
ZnO-Varistors have been studied by scanning tunnelling microscopy and spectroscopy. Tunnelling current-voltage characteristics indicate that grains present a rectifying behaviour.
Castro, M. S., Suárez, M. P., Aldao, C. M.   +2 more
doaj  

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., Durán, P., Moure, C., Villegas, M., Valle, F. J., Caballero, A. C.   +5 more
doaj  

Varistores cerámicos basados en óxido de cinc

Boletín de la Sociedad Española de Cerámica y Vidrio, 2005
ZnO-based varistors are electroceramic devices with an extremely high non-linear electrical response, originated on a functional microstructure with well defined characteristics. In the present paper the development of these materials since its discovery
Peiteado, M.
doaj  

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., Varela, J. A., Mosquera, A.   +2 more
doaj