Influence of the Citric Acid and Metal Cation Ratio on the Structural and Morphological Characteristics of Aluminum Oxide Synthesized by Pechini Method

Abstract:

Given the opportunities that aluminas present in relation to the broad field of applications to which they refer, the literature has reported great diversity in methodology to obtain these materials in the search of generating the best properties. In this way, the aim of this work is to evaluate the use of different citric acid and metallic cation ratio on the structural and morphological characteristics of the alumina synthesized by Pechini method and calcined at 1100°C. The samples were characterized by X-ray diffraction, thermal analysis, particle size and scanning electron microscopy. The results showed a large amount of loss of mass after pyrolysis. The α-alumina phase was achieved for the two studied ratio reaching values for crystallite size of 41.4 and 52.5 nm, crystallinity of 88 and 91.2%, agglomerates size of 12.3 and 14μm, for the synthesized samples 2:1 and 3:1, respectively. According to the SEM images, the changes in the citric acid: metallic cation ratio did not significantly modify the morphology of the alumina.

• Periodical: Materials Science Forum (Volumes 798-799)
• Pages: 133-138
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.798-799.133
• Online since: June 2014
• Authors: Mirele Costa da Silva*, Hélio Lira Lucena, Normanda Lino de Freitas
• Keywords: Aluminum Oxide, Citric Acid, Metallic Cation, Pechini Method

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