2024-03-29T08:25:28Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/967732023-10-31T12:43:47Zcom_10234_7033com_10234_9com_10234_7053col_10234_8618col_10234_8639
00925njm 22002777a 4500
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Gómez, Andrés
author
Villanueva, Regina
author
Vie, D.
author
Murcia Mascaros, S.
author
Martínez, Eduardo
author
Beltrán, Aurelio
author
Sapiña, Fernando
author
Vicent Cabedo, Mónica
author
Sánchez-Vilches, Enrique
author
2013
Nanocrystalline zirconia powders have been obtained at the multigram scale by thermal decomposition of precursors resulting from the freeze-drying of aqueous acetic solutions. This technique has equally made possible to synthesize a variety of nanostructured yttria or scandia doped zirconia compositions. SEM images, as well as the analysis of the XRD patterns, show the nanoparticulated character of those solids obtained at low temperature, with typical particle size in the 10–15 nm range when prepared at 673 K. The presence of the monoclinic, the tetragonal or both phases depends on the temperature of the thermal treatment, the doping concentration and the nature of the dopant. In addition, Rietveld refinement of the XRD profiles of selected samples allows detecting the coexistence of the tetragonal and the cubic phases for high doping concentration and high thermal treatment temperatures. Raman experiments suggest the presence of both phases also at relatively low treatment temperatures.
GÓMEZ, A., et al. Large scale synthesis of nanostructured zirconia-based compounds from freeze-dried precursors. Journal of Solid State Chemistry, 2013, vol. 197, p. 120-127.
0022-4596
http://hdl.handle.net/10234/96773
http://dx.doi.org/10.1016/j.jssc.2012.07.045
Powders-chemical preparation
Freeze-drying
Microstructure-final
Grain size
ZrO2
Large scale synthesis of nanostructured zirconia-based compounds from freeze-dried precursors