Crystallization of Al2O3-TiO2 sol-gel systems

Alessandro Martucci*, Plinio Innocenzi, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Al2O3-TiO2 thin films and powders were synthesised from acid catalyzed sols of aluminium and titanium alkoxides containing acetyl acetone as a chelating agent. The crystallization of the system was studied as a function of the relative compositions and the firing temperature. Films of four different alumina-titania compositions (10, 20, 30 and 40 mol % alumina) were prepared and fired at various temperatures in the range from 300 to 1000°C. The films and powders were amorphous, at any composition, up to about 600°C. Larger molar contents of Al2O3 were found to have an inhibitory effect on the crystallization of TiO2, while larger contents of TiO2 had only a weak influence on Al2O3 crystallization. The formation of a metastable ß-Al2TiO5 phase was observed in films at 1000°C.

Original languageEnglish (US)
Pages (from-to)891-894
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume107
Issue number10
DOIs
StatePublished - Jan 1 1999

Keywords

  • Aluminium titanate
  • Crystallization
  • Sol-gel
  • Thin films

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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