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Synthesis of nanocrystalline tetragonal zirconia by a polymeric organometallic method

✍ Scribed by Antonio L. Quinelato; Elson Longo; Edson R. Leite; José A. Varela

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
89 KB
Volume
13
Category
Article
ISSN
0268-2605

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✦ Synopsis

A polymeric precursor method based on the Pechini process was successfully used to synthesize zirconia-12 mol% ceria ceramic powders. The influence of the main process variables (citric acid-ethylene glycol ratio, citric acidtotal oxides ratio and calcination temperature) on phase formation and powder morphology (surface area and crystallite size) were investigated. The thermal decomposition behavior of the precursor is presented. X-ray diffraction (XRD) patterns of powders revealed a crystalline tetragonal zirconia single-phase, with crystallite diameter ranging from 6 to 15 nm. The BET surface areas were relatively high, reaching 95 m 2 g À1 . Nitrogen adsorption/desorption on the powders suggested that nonaggregated powders could be attained, depending on the synthesis conditions.

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