The Role of Precursor Concentration on the Characteristics of SiO2-CaO Films

Sol-gel films on Titanium Ti6Al4V alloys polished wafer were prepared from sono-sols obtained from tetraethylorthosilicate (TEOS) and hydrated calcium nitrate. Different precursor solutions were used by dilution of the starting mixture in ethanol. The resulting materials were characterised by different techniques: scanning electron microscopy, energy disperses spectroscopy and atomic force microscopy. These studies showed different texture and porosity properties depending on volume proportions of the sol and ethanol. Solutions with lower ethanol content gave a larger pore distribution and roughness.