Papers by Keyword: Titania Nano-Sol

Abstract: Titania nanosols were prepared by a sol-gel method using tetrabutyl titanate (TTB) as precursors. Effects of the content of chelator, water, catalyst, and reaction time on the ultraviolet -resistant property of textile were investigated. An orthogonal experiment was conducted for the optimization preparation. The ultraviolet protection factor (UPF) value of fabrics increased with the enhancement of the TTB content; however, reaction time had limited influence on the UPF. When chelator, water, and catalyst contents were 5.5, 90, and 5.5% (w/w) (in solution B), respectively, the preparation was optimal, and the UPF value of fabric reached 60.

Abstract: We have investigated a novel synthesis for highly spherical and ultrafine barium titanate (BaTiO3) powders using a peptized titania (TiO2) nano-sol as a precursor. The obtained TiO2 nano-sol had the size less than 10 nm, which could be easily converted to BaTiO3 under 100 °C. The size of the resulting BaTiO3 powder could be controlled from 42 to 167 nm by lowering the solution concentration from 1.00 M to 0.15 M. BET analysis indicated that the as-prepared BaTiO3 powders had some porosity which was increased with the particle size. It was also found that the as-prepared BaTiO3 with smaller size had higher tetragonality and less intra-granular pores after annealing.