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Closed Access item Varistors based in the ZnO–Bi2O3 system: Microstructure control and properties

Authors:Peiteado, M.
Fernández Lozano, José Francisco
Caballero Cuesta, Amador
Keywords:ZnO, Varistors, Grain growth, Sintering kinetics
Issue Date:2007
Citation:Journal of the European Ceramic Society 27 (2007) 3867–3872
Abstract:The present contribution deals with the development of an empirical approach that will describe the evolution of the breakdown voltage in ZnObased varistors as a function of the sintering variables. This relationship is described through the kinetic analysis of the grain growth process. It is found that for a certain range of sintering conditions the varistor breakdown voltage could be calculated from the average size that zinc oxide grains achieve, provided that the varistor microstructure evolves in a gradual and controlled manner and the distribution of the electrical interphases remains stable.
Publisher version (URL):http://dx.doi.org/10.1016/j.jeurceramsoc.2007.02.046
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