Resumo
In the present work, a study was carried out on the property changes that the
addition of vanadium in the P2O5-CaO-V2O5 system can cause. A non-linear change
of a glass property due to the mixing of different glass formers in the system calciumphosphate
and calcium-vanadate is expected. There are very few reports on the mixed
glass former effect in terms of mechanical and thermal properties for this system. To
fill this gap, elastic constants, and micro-hardness, were studied in glasses of the
constant molar fraction of calcium but of different V2O5-to-P2O5 ratios. In addition,
measurements were flanked by Raman Spectroscopy and X-ray photo-electron
spectroscopy to assign points of inflection of these properties in dependence on the
V2O5-to-P2O5 ratio to their structural origin and chemical state. There is a non-linear
change in the properties of vanadium increasing in the system. The system remains
vitreous up to 40 mol% V2O5.