Abstract
The influence of TiO 2 content on the structure of 3B 2O 3·K 2O glass was investigated by Raman spectroscopy. First, the addition of titanium oxide does not determine any structural changes in studied glasses. For x≤0.1 Raman spectra indicate that studied glasses contain mainly pentaborate groups and boroxol rings. At a high concentration of titanium oxide the number of nonbridging oxygens increases and the glass structure becomes more randomised. For x > 0.1 TiO 2 ring type metaborate groups and “loose” BO 4 − tetrahedra appear. A small number of chain-type metaborate and pyroborate groups are also present in this kind of glass. Therefore, we conclude that titanium ions act as network modifiers in these glasses only at high concentration.
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