Calcination Influence on the Structure and Morphology of Zirconia Synthesized by Combustion Reaction

Abstract:

This research aims to synthesize ZrO₂ by combustion reaction in batches of 15 g of the product and to evaluate the calcination influence on the structural and morphological characteristic about synthesized sample. For the synthesis of ZrO₂, the stoichiometry of phase was established in accordance with the propellants and explosives chemical concept, whereas the stoichiometric coefficient φ =1. After the synthesis, the sample as synthesized was calcined at 600 and 700°C and subsequently characterized by XRD, SEM, textural analysis (BET) and FTIR. The results have shown to the sample as synthesized and then calcined at 600°C the majority phase formation of orthorhombic zirconia with monoclinic phase dashes. The temperature increase to 700°C, has been transformed a part of the orthorhombic ZrO₂ to a monoclinic phase, contributing to a surface area reduction of the samples, showing irregular agglomerates in morphology, with adsorption/desorption isotherms type IV and mesoporosity characteristic.

• Periodical: Materials Science Forum (Volumes 775-776)
• Pages: 189-194
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.775-776.189
• Online since: January 2014
• Authors: F.N. Silva, J. Dantas, A.S. Silva, E.M.J.A. Pallone, A.C.F.M. Costa
• Keywords: Calcination, Combustion Reaction, Morpholoy, Zro₂

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