Tellurite And Fluorotellurite Glasses For Active And Passive
Tellurite And Fluorotellurite Glasses For Active And Passive 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 .
7. Surface properties; MDO 298 Fig. (7.30) shows optical micrographs of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %) after etching in 3M HCl at 21°C whilst agitated in an ultrasonic bath (see section 7.1.2.1 for further experimental details). 20 µm (a) 30 sec. (b) 1 min. (c) 2 min. (d) 5 min. Fig. (7.30): Optical micrographs of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %) after etching in 3M HCl at 21°C whilst agitated (all micrographs the same scale).
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7. Surface properties; MDO 298<br />
Fig. (7.30) shows optical micrographs of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol.<br />
%) after etching in 3M HCl at 21°C whilst agitated in an ultrasonic bath (see section<br />
7.1.2.1 for further experimental details).<br />
20 µm<br />
(a) 30 sec. (b) 1 min.<br />
(c) 2 min. (d) 5 min.<br />
Fig. (7.30): Optical micrographs of glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %)<br />
after etching in 3M HCl at 21°C whilst agitated (all micrographs the same scale).
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