Synthesis of Gadolinium Doped Ceria Ceramic Powder by Polymeric Precursor Method (Pechini)

Abstract:

The synthesis by polymeric precursors method (Pechini) was used to acquire gadolinium doped ceria forming Ce_0,8Gd_0,2O_1,9 system, reaching high stoichiometric control features and nanosized particles to form dense solid electrolyte of high ionic conductivity. The synthesis was performed with cerium and gadolinium nitrates hexahydrates, citric acid and ethylene glycol. After the pre-calcination at 250°C/18h a resin was obtained like an expanded foam (puff). According to the iterature, this fact indicates that there is a reduction of agglomerates amount in a ceramic powder. A thermogravimetry-differential thermal analysis evaluated the thermal behavior of the resin. Infrared spectroscopy determined the organic matter and nitrates presence, before and after the calcination process. The X-ray diffraction identified the fluorite-type structure and was determined the crystallite size by the Scherrer equation in 22 and 46 nm for the powder calcined respectively at 600 and 800°C. The scanning electron microscopy evaluated the agglomeration degree and the morphology of the powders.

• Periodical: Materials Science Forum (Volumes 798-799)
• Pages: 182-188
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.798-799.182
• Online since: June 2014
• Authors: Jesús Mauricio González Martínez*, Rodrigo Arabey Muñoz Meneses, Cosme Roberto Moreira da Silva
• Keywords: Gadolinium-Doped Ceria, Polymeric Precursor Method

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