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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/18517
Title: Ti-based nanocoatings on Al2O3 powders
Authors: Villegas, Marina; Sierra, T.; Caballero Cuesta, Amador; Fernández Lozano, José Francisco
Keywords: Heterogeneous precipitation
Issue Date: 2007
Publisher: Elsevier
Citation: Ceramics International 33 (2007) 875–878
Abstract: Ti-based nanocoatings on ceramic powders were successfully fabricated by heterogeneous precipitation method. Commercial Al2O3 (average particle size of 0.5 mm), titanium tetrabutoxide (Ti(C4H9O)4) and urea (CO(NH2)2) have been used as starting materials. Selecting appropriate precipitation conditions, both the thickness and the uniformity of Ti-based nanocoatings were adjusted.With a molar ratio TiO2/Al2O3 = 0.05 and the use of urea in excess, a homogeneous nanocoating of 20 nm on the alumina powder surface was attained. FTIR spectra indicated the formation of the TiO2-based nanocoating onto Al2O3 particles and TEM examinations showed that the amorphous coating layer crystallized to <10 nm TiO2 particles upon calcination at 500 8C.
Publisher version (URL): http://dx.doi.org/10.1016/j.ceramint.2006.01.017
URI: http://hdl.handle.net/10261/18517
DOI: 10.1016/j.ceramint.2006.01.017
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