Caracterización microestructural y eléctrica de diferentes composiciones del sistema ZrO2-8Y2O3-TiO2
Source abstract
Abstract
espanolEl objetivo del presente trabajo es la preparacion y caracterizacion microestructural y electrica en funcion de la temperatura de diferentes composiciones del sitema Zr02-8Y203-Ti025 tomando x valores entre O y 30 % mol. Debe tenerse en cuenta que la concentracion de vacantes de oxigeno, al aumentar la concentracion de TIO2 disminuye. Las muestras sinterizadas se caracterizaron electricamente en funcion de la temperatura, mediante espectroscopia de impedancia en aire. A partir de 15 % mol de TIO2, a 1.500 °C, aparece claramente tita-nato de circonio aumentando su concentracion a medida que aumenta el contenido de TIO2. El arco de borde de grano desaparece cuando se incrementa la concentracion de dopante. La energia de activacion disminuye con la incorporacion de TIO2 EnglishThe aim of the present work is the preparation, microstructure and electrical characterization as a function of temperature of the different composition of the systems Zr02-8Y203-Ti02, with a constant amount of 8 mol % of yttria and varying the TIO2 concentration between 0 and 30 mol%, it must be taken into account that the oxygen vacancy concentration decreases as TIO2 introduction increases. By using impedance spectroscopy in air, sintered samples were electrically characterized, as a function of temperature. From 15 mol% of TIO2 at 1.500 C appears netly zirconium titanate which increase as titanium content. The grain boundary arc dissappears as titanium concentration is augmented. Finally, the activation energy decreases with TIO2 incorporation.
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Research context
OpenAlex topics: Fuel Cells and Related Materials · Advancements in Solid Oxide Fuel Cells
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