Effect of Doping Ti Ions on Spectroscopic Behavior of Lead Bismuth Phosphate Glasses

A new Phosphate based glass composition was formulated and used as a host matrix for preparation of glass materials. Titanium oxide doped phosphate glasses were prepared at low melting temperature. The doping of TiO2 was varied form 0.1 mol % to 1.0 mol% during the glass formation. The effect of TiO2 content on the optical properties have been investigated. The presence of varying titanium oxide results in spectroscopic changes aroung Ti3+ ion and is explored to optical absorption, IR and EPR spectra. The EPR spectra exhibit resonance signals characterstic of Ti3+ ions in octahedral sites with tetragonal distribution. The results from IR showed the presence of trigonal and tetrahedral PO4, PO3 groups within the host network structure. With the introduction of TiO2 into the glass network, two bands are appeared due to TiO4 and Ti-O-Ti symmetric stretching vibrations of TiO6 structural units. In optical absorption spectra two absorption bands identified due to electronic transitions of Ti3+ ions as B2g→B1g and B2g→E.