Tellurite And Fluorotellurite Glasses For Active And Passive

7. Surface properties; MDO 297
Wt. loss / %
Wt. loss / %
5
4
3
2
1
0
5
4
3
2
1
0
Wt. loss / %
0.5
0.4
0.3
0.2
0.1
21 o C y=0.34-0.33083exp(-x/9.91053) R 2 =0.95652
60 o C y=4.63-4.37085exp(-x/6.98801) R 2 =0.97470
Wt. loss / %
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 2 4 6 8 10 12 14 16 18 20 22
0 2 4 6 8 10 12 14 16 18 20 22
21 o C y=0.06806x R 2 =0.98337
60 o C y=1.06586x R 2 =0.99441
0.0
0 1 2 3 4 5
(t) 1/2 / (days) 1/2
Time / days
(a)
21 o C y=0.34-0.33083exp(-x/9.91053) R 2 =0.95652
60 o C y=4.63-4.37085exp(-x/6.98801) R 2 =0.97470
Time / days
21 o C y=0.06806x R 2 =0.98337
60 o C y=1.06586x R 2 =0.99441
0 1 2 3 4 5
(t) 1/2 / (days) 1/2
(b)
Fig. (7.29): Weight loss of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %) after
immersion in distilled water at 21 (■) and 60°C (●), plotted against: (a) time, and (b)
(time) 1/2 .