The Effect Of Monovalent And Divalent Metal Oxides On The Network Cohesion Of Binary Phosphate Glasses: Aspects Revealed By Spectral Determination Of Basicity Trends

This article reports the use of optical spectroscopy to examine the equilibria between the oxidation states of dopants like Cu, Mo, or Ti, for the case of Rm+O-P2O5 (m=1 or 2) type glassy hosts (melted under reductive conditions). It was determined that the presence of an R2+O metal oxide increases the stability of the lower dopant oxidation states (Cu, Cu+, Mo3+ Ti3+), while the presence of a R1+O oxide favours the higher oxidation states.