Structural studies on NaPO 3 –MoO 3 –V 2 O 5 glasses and glass-ceramics

Glass samples in the ternary NaPO 3 –MoO 3 –V 2 O 5 system were prepared using the melt-quenching technique and structurally characterised by XRD, DSC, Raman and infrared spectroscopy. The system exhibited a wide glass-forming composition range, with observed T g trends attributed to the formation of transition metal cluster structures and modifications in the phosphate network, leading to less connected Q 1 and Q 0 phosphate units within the glass matrix. Selected 70% transition metal-containing compositions were used to prepare their corresponding glass-ceramics. XRD analysis revealed the preferential crystallisation of vanadium-containing phases interconnected with phosphate tetrahedra, effectively replicating the local structural environment of their parent glass.