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Título

Ti-based nanocoatings on Al2O3 powders

AutorVillegas, Marina; Sierra, T.; Caballero Cuesta, Amador; Fernández Lozano, José Francisco
Palabras claveHeterogeneous precipitation
Nanocoatings
Fecha de publicación2007
EditorElsevier
CitaciónCeramics International 33 (2007) 875–878
ResumenTi-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.
Versión del editorhttp://dx.doi.org/10.1016/j.ceramint.2006.01.017
URIhttp://hdl.handle.net/10261/18517
DOI10.1016/j.ceramint.2006.01.017
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