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Tellurite And Fluorotellurite Glasses For Active And Passive

Tellurite And Fluorotellurite Glasses For Active And Passive

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7. Surface properties; MDO 293<br />

20 µm<br />

(a) 60 sec. (b) 120 sec.<br />

(c) 180 sec. (d) 240 sec.<br />

Fig. (7.26): Optical micrographs of glass MOD012 (75TeO2-10ZnO-10Na2O-5GeO2 mol.<br />

%), after (a) 60, (b) 120, (c) 180, and (d) 240 sec. immersion in a 1M solution of HCl at<br />

15°C (all micrographs the same scale).<br />

Fig. (7.27) shows the etch rates of glass MOD012 (75TeO2-10ZnO-10Na2O-5GeO2 mol.<br />

%), immersed in 1M HCl, and 3M H2SO4 at 15°C.

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