Raman Spectroscopy, X-Ray, SEM, and DTA Analysis of Alkali-Phosphate Glasses Containing WO₃ and Nb₂O₅

Table 1

Physical parameters for AW-40 glasses.

Glass	Density (g/cm^3)	𝑉𝑀(cm^3)	𝑇𝑔(°C)	𝑇𝑥1(°C)	Δ𝑇=𝑇𝑥1−𝑇𝑔
WO3-free [23]; 40P2O5–10Nb2O5–50Li2O	2.69	36.55	450	480	30
LiW40; 40P2O5–10Nb2O5–20WO3–30Li2O	3.21	43.21	340	472	123
NaW40; 40P2O5–10Nb2O5–20WO3–30Na2O	3.19	46.50	420	490	70