Síntese e caracterização dos óxidos mistos CeCo03 com estrutura tipo perovisquita.

Abstract

Perovskites are ceramic materials with wide use in various fields, especially in catalysis, where recent studies show the versatility and performance of these catalytic materials. The aim of this study was to synthesize an oxide structure AB03, CeCo03, and characterize it by X-ray diffraction, Rieltveld method, thermogravimetry and derivative thermogravimetry to analyze loss / mass gain during calcination. The obtained powder was heated at 300 ° C and calcined up to 1000 0 C. The material was synthesized from the Pechini method modified by replacing the citric acid with ethylene glycol by commercial gelatin. The results were satisfactory, since there is dust formation with perovskite structure. The material exhibits good thermal stability and cationic vacancies, favorable factors for catalytic reactions.