El óxido de estaño, SnO 2 , es el compuesto más utilizado en la fabricación de sensores de gas, principalmente para gases reductores como el CO y H 2 . Dado que la respuesta de estos sensores depende fuertemente de su superficie, es de gran interés desarrollar métodos de síntesis que permitan obtener nanopartículas de estos compuestos para utilizarlas posteriormente en la conformación de películas. En el presente trabajo se describe adecuadamente el método del precursor polimérico utilizado para obtener nanopartículas de SnO 2 -TiO 2 . Los polvos cerámicos obtenidos se caracterizaron mediante ATD/TG, DRX, FTIR, y MEB. Además, se analizó el comportamiento eléctrico de las películas gruesas obtenidas, cuando son expuestas a atmósferas de O 2 y CO. Palabras clave: Respuesta eléctrica, SnO 2 -TiO 2 ; nanopartículas, Pechini. Electrical answer of the SnO 2 -TiO 2 thick films shaping with ceramics powders obtained by Pechini method.Tin oxide is the compound more used in the gas sensor production, mainly to reduce gases like CO and H 2 . Their electrical properties are strongly dependent of its surface. For this is of great importance to synthesize nanoscale tin oxide particles to use they later in the films conformation. The synthesis of SnO 2 -TiO 2 nanoparticles by polymeric precursor method is reported in this work. The particles were characterized by DTA/TG, FT-IR, XRD and SEM. Also, the electrical response of thick films measured under oxygen and carbon monoxide atmospheres is was analyzed.
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