Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>ゾル-ゲル系の結晶化挙動

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  • MARTUCCI Alessandro
    Dipartimento di Ingegneria Meccanica, Settore Materiali, Università di Padova
  • INNOCENZI Plinio
    Dipartimento di Ingegneria Meccanica, Settore Materiali, Università di Padova
  • TRAVERSA Enrico
    Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma “Tor Vergata,” Via della Ricerca Scientifica

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タイトル別名
  • Crystallization of Al2O3-TiO2 Sol-Gel Systems.

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説明

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 40mol% 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 β-Al2TiO5 phase was observed in films at 1000°C.

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