Results 1 to 10 of about 1,324 (170)
Varistores à base de SnO2: estado da arte e perspectivas [PDF]
Ceramica, 2000 Este trabalho descreve a história dos varistores à base de SnO2. Nele são apresentadas as principais características deste novo sistema varistor e uma comparação direta com o sistema tradicional à base de ZnO, estabelecendo as vantagens e desvantagens. O
Elson Longo
exaly +5 more sources
Efeito do Pr2O3 nas propriedades elétricas de varistores à base de SnO2 [PDF]
Ceramica, 2003 A proposta deste trabalho foi o estudo e a obtenção de uma cerâmica densa à base de SnO2 dopada com CoO, Ta2O5 e diferentes concentrações de Pr2O3. Os sistemas apresentaram elevados valores de densidade relativa, e propriedades não ôhmicas.
Marcelo O Orlandi, M Bomio, Elson Longo
exaly +5 more sources
Análisis de varistores mediante STM y STS
Boletin De La Sociedad Espanola De Ceramica 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.
Miriam Castro
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Boletin De La Sociedad Espanola De Ceramica Y Vidrio, 2004 In the present work, the theory of charge transport through active interfaces is used to study the electronic properties of ZnO-based varistors. It has been observed that for a certain range of sintering temperatures the microscopic electrical response ...
Fernández Hevia, D. +3 more
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Degradación y recuperación de varistores de ZnO
Boletin De La Sociedad Espanola De Ceramica 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. +3 more
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Varistores cerámicos basados en óxido de cinc
Boletin De La Sociedad Espanola De Ceramica 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
Marco Peiteado
exaly +4 more sources
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
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 +2 more sources
Estudio del envejecimiento de dispositivos electrónicos: varistores y LEDs [PDF]
, 2016 In this project presented a study of the degradation through accelerated tests of LEDs and varistors. This degradation is measured based on Sr, the irreversible entropy that is generated during testing.
Yao, Jiaqiang
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