Low temperature sol-gel preparation of β-Al2TiO5 thin films: spectroscopic analysis of the precursors

Silvia Licoccia, Maria Luisa Di Vona, Enrico Traversa, Plinio Innocenzi, Alessandro Martucci

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations

Abstract

Two sol-gel syntheses allowed the preparation of β-Al2TiO5 thin films on silicon substrates at 700°C, reacting aluminum and titanium alkoxides with and without acetylacetone as a chelating agent. Nuclear magnetic resonance (NMR) and mass spectra of the sols allowed identification of the intermediate species formed and to show the formation of an Al-Ti containing polymer establishing that the synthesis without acetylacetone leads to the most extensive polymerization. The formation of β-Al2TiO5 at low temperatures is attributed to diffusion-limited crystallization process, which takes place in the conditions of high homogeneity at molecular level reached in the sol-gel synthesis. The crystallization of the films was studied as a function of the firing time and temperature and confirmed that β-Al2TiO5 with better thermal stability was obtained with the synthesis without chelating agent.

Original languageEnglish (US)
Pages (from-to)577-580
Number of pages4
JournalJournal of Sol-Gel Science and Technology
Volume19
Issue number1-3
DOIs
StatePublished - Dec 1 2000
Event10th International Workshop pn Glass and Ceramics, Hybrids and Nanocomposites from Gels - Yokohama, Jpn
Duration: Sep 20 1999Sep 24 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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