Influence of niobium and titanium introduction on optical and physical properties of silicate glasses

The effects on optical and mechanical properties of introducing large amounts of TiO2 and Nb2O5 in a silicate matrix have been studied. Raman spectroscopy has been carried out in order to tentatively establish correlations between structural and physical properties. The high linear refractive index and the increase of the hardness for increasing d0 ions concentration have been related to the formation of a denser glass network dominated by corner linked NbO6 and TiO6 octahedra.

Increase of Knoop microhardness as a function of the number of Nb5+ + Ti4+ ions in high refractive index silicate glass.Figure optionsDownload as PowerPoint slideHighlights
► We investigate the introduction of large amounts of TiO2 and Nb2O5 in a silicate matrix.
► We establish correlation between the TiO2 and Nb2O5 content in a glass matrix and the high refractive index.
► We established correlation between the d0 ions concentration and the glass mechanical property.