The preparation and characterization of Al2O3/ZrO2 nanocrystalline composite by a simple gel method

Al2O3-ZrO2 nanocomposites were prepared in tartaric, glycolic and citric acids by a simple gel method. The surface area of the samples changed from 58 to 278 m2/g. The average crystallite size of the nanocomposites heat treated at 1000 C was < 10 nm and the tetragonal zirconia phase, without tran...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2010, Vol.173 (1-3), p.80-83
Main Authors: Gocmez, H, Fujimori, H, Tuncer, M, Gokyer, Z, Duran, C
Format: Article
Language:English
Subjects:
Aluminum oxide
Citric acid
Crystallites
Heat treatment
Nanocomposites
Nanomaterials
Nanostructure
Phase transformations
Transformations
X-rays
Zirconium dioxide
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Summary:Al2O3-ZrO2 nanocomposites were prepared in tartaric, glycolic and citric acids by a simple gel method. The surface area of the samples changed from 58 to 278 m2/g. The average crystallite size of the nanocomposites heat treated at 1000 C was < 10 nm and the tetragonal zirconia phase, without transformation to the monoclinic phase, remained in the alumina matrix close to 1500 C according to X-ray results. However, the monoclinic phase was observed using Raman spectra of samples heated at 1500 C. The prepared gel and subsequent heat-treated powders were characterised by XRD, Raman spectroscopy and TEM to obtain detailed information regarding differentiation of polymorphs of zirconia and the formation of powders.
ISSN:0921-5107
DOI:10.1016/j.mseb.2010.01.040