Hydroxides as precursors of nanocrystalline oxides

X. Bokhimi, A. Morales, M. Portilla, A. García-Ruiz

Research output: Contribution to journalConference articlepeer-review

26 Scopus citations

Abstract

The formation of nanocrystalline oxides by hydrolysis is analyzed X-ray powder diffraction was used to measure atom distribution; when it was crystalline the structure was refined by the Rietveld method. Three systems were studied: zirconia, titania and magnesia; they were prepared by using the sol-gel technique. During hydrolysis, the proportions of aquo, hydroxo and oxo bindings determined the initial atom distribution and its evolution with temperature. In zirconia, the amorphous structure was fixed by aquo bondings; this structure was obtained in titania samples only at high water to alkoxide molar ratios. In magnesia system, synthesis ions also affected the concentration of these bindings.

Original languageEnglish
Pages (from-to)589-592
Number of pages4
JournalNanostructured Materials
Volume12
Issue number1
DOIs
StatePublished - 1999
EventProceedings of the 1998 4th International Conference on Nanostructured Materials (NANO '98) - Stockholm, Swed
Duration: 14 Jun 199819 Jun 1998

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