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Low temperature synthesis of MgxAl2(1-x)Ti(1+x)O5 films by sol-gel processing

Innocenzi, Plinio and Martucci, Alessandro and Armelao, Lidia (2005) Low temperature synthesis of MgxAl2(1-x)Ti(1+x)O5 films by sol-gel processing. Journal of the European Ceramic Society, Vol. 25 (16), p. 3587-3591. ISSN 0955-2219. Article.

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DOI: 10.1016/j.jeurceramsoc.2004.09.020

Abstract

Aluminium titanate films thicker than 0.5 μm have been synthesized by sol–gel methods. The films have been deposited via repetitive dip-coating on silicon wafers and their thermal stability has been tested as a function of the annealing time and temperature. The sol–gel approach has allowed the formation of the aluminium titanate phase at temperatures (~700°C) much lower than those necessary for solid-state reactions (~1450°C). Magnesium oxide has been used to improve the thermal stability of the films at high temperatures. The behavior of samples prepared with two different Mg content, i.e. Mg0.2Al1.6Ti0.8O5 and Mg0.6Al0.8Ti1.6O5, has been studied. The films have proven to be stable at 1150°C, for up to 90 h. X-ray photoelectron spectroscopy has shown that after firing at 500°C the surface chemical composition of the films is in accordance with the nominal one, whilst at higher annealing temperatures some differences, attributed to diffusion effects, have been observed.

Item Type:Article
ID Code:1267
Status:Published
Refereed:Yes
Uncontrolled Keywords:Films, Al2TiO5, sol-gel processes, X-ray methods
Subjects:Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 Scienza e tecnologia dei materiali
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > INSTM-Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Unità di ricerca di Sassari
001 Università di Sassari > 01 Dipartimenti > Architettura e pianificazione
Publisher:Elsevier
ISSN:0955-2219
Copyright Holders:© 2004 Elsevier
Additional Information:Pubblicato online il 22 dicembre 2004.
Deposited On:18 Aug 2009 10:04

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