Viscosity and Glass Transition in Amorphous Oxides

Table 6

Glass transition temperatures of amorphous materials.

Amorphous material	𝑅𝐷	𝑇𝑔/𝐾	𝑓𝑐
Silica (SiO2)	1.45	1475	0.15
Germania (GeO2)	1.47	786	0.15
SLS (mass%):	2.16	870	1.58 ×10^−3
70SiO2 21CaO 9Na2O
B2O3	3.28	580	9.14 ×10^−5
Diopside (CaMgSi2O6)	4.51	978	6.35 ×10^−7
Anorthite (CaAl2Si2O8)	4.52	1126	3.38 ×10^−7