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Fully densified zircon co-doped with iron and aluminium prepared by sol-gel processing

Research output: Contribution to journalJournal articlepeer-review

Published
  • W. P. C. M. Alahakoon
  • S. E. Burrows
  • A. P. Howes
  • B. S. B. Karunaratne
  • Mark E. Smith
  • R. Dobedoe
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<mark>Journal publication date</mark>1/09/2010
<mark>Journal</mark>Journal of the European Ceramic Society
Issue number12
Volume30
Number of pages9
Pages (from-to)2515-2523
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A sol-gel technique has been used to prepare Fe and Al doped zircon. Structural properties have been studied by X-ray diffraction, nuclear magnetic resonance, scanning electron microscopy and transmission electron microscopy (TEM). Fully densified zircon was produced with high zircon yield and promising microstructures. The presence of Fe promotes zircon formation, while Al improves densification. The zircon phase starts to form at 1215 degrees C, with almost single phase zircon obtained at 1400 degrees C when heated for 1 h. Densification increases very significantly (to 99.7% of theoretical density) when the holding time was increased to 48 h from 1 h. TEM micrographs reveal a crystalline grain boundary phase containing some Fe and Al. (C) 2010 Elsevier Ltd. All rights reserved.