Please use this identifier to cite or link to this item: http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1544
Effect of Sb2O5 doping and sintering temperature on varistor properties of SnO2 -Co3O4- based ceramics
JOSUE AMILCAR AGUILAR MARTINEZ
MARTIN IGNACIO PECH CANUL
Acceso Abierto
Sin Derechos Reservados
Sb2O5
In this work, the effect of Sb2O5 content and sintering temperature on varistor properties of SnO2–Co3O4 based ceramics was investigated. The ceramic materials were prepared by conventional mixing varying the amounts of Sb2O5 in five levels (0.1, 0.2, 0.3, 0.4 and 0.5 mol %) and the sintering temperature in two levels (1350 and 1450 °C). Results show that sintering temperature significantly affects the breakdown voltage, being the effect more prominent in the ceramic with 0.3 mol % Sb2O5. Moreover, an evident grain growth was produced but without any apparent total densification. At 1450 oC, the optimum sintering temperature to achieve the lowest breakdown voltages, Sb2O5 additions confer a beneficial effect but only up to 0.3 mol %. The nonlinearity coefficient is also affected by sintering temperature but in an opposite manner because, at the same composition (0.3 mol %), while the optimum nonlinearity coefficient is achieved at 1350 oC, the best breakdown voltage is obtained at 1450 oC.
2006
Memoria de congreso
Inglés
OTRAS
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