Tellurite And Fluorotellurite Glasses For Active And Passive

Percentage (%)
80
70
60
50
40
30
20
10
0
6. Optical properties; MDO 189
Strong OH Weak OH Free OH
OH type
MOD006 (3 mol. % PbO) MOD010 (5 mol. % PbO) MOD012 (5 mol. % GeO2)
Fig (6.11): Percentage of OH groups in glass series (80-x)TeO2-10Na2O-10ZnO-xMO,
where MO is PbO or GeO2, for MOD006 (x = 3 mol. % PbO), MOD010 (x = 5 mol. %
PbO) and MOD012 (x = 5 mol. % GeO2).
It can be seen that the percentage of strongly H-bonded OH in all three glasses was
approximately the same, ≈ 14 %. The percentage of weakly H-bonded OH and free OH in
the PbO containing glasses was approximately the same (≈ 63 and 22 % respectively).
However, the percentage of weakly H-bonded OH and free OH was lower in the GeO2
containing glass than the PbO containing glasses (≈ 75 and 13 % respectively).
Infrared spectroscopy of glasses of the series (90-x)TeO2-10Na2O-xZnO
Fig. (6.12) shows infrared spectra of glass of the series (90-x)TeO2-10Na2O-xZnO, for x
= 12 mol. % (MOD007) and x = 10 mol. % (MOD013).