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Low temperature synthesis of nanocrystalline α-alumina by unconventional methods
|Zoltán Ecsedi 1, Ioan Lazău 1, Robert Ianoş 1, Cornelia Păcurariu 1, Paul C. Barvinschi 2|
1. Politehnica University of Timişoara, P-ţa Victoriei no. 2, Timisoara 300006, Romania
Three unconventional synthesis methods have been successfully applied for the preparation of a-Al2O3 powders as follows: thermal decomposition of the complex combination resulted from the oxidation reaction of 1,2-ethanediol by the aluminum nitrate; the solution combustion synthesis based on the exothermal redox reaction of the aluminum nitrate with urea as fuel, respectively acid catalyzed sol-gel method using aluminum triisopropylate precursor. The synthesis temperature, purity and morphology of the prepared alumina powders are highly affected by the used synthesis method. Nanocrystalline a-Alumina were obtained at 500°C by heating aluminum nitrate and an organic fuel, at 1000°C using the decomposition of complex combination method and also at 1000°C using sol-gel method. The formation of a-alumina phase was investigated by X-ray diffraction (XRD) studies.
Presentation: Poster at E-MRS Fall Meeting 2007, Symposium A, by Zoltán Ecsedi
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-04-02 17:50 Revised: 2009-06-07 00:44