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Tellurite And Fluorotellurite Glasses For Active And Passive

Tellurite And Fluorotellurite Glasses For Active And Passive

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At. %<br />

80<br />

70<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

0<br />

7. Surface properties; MDO 289<br />

Te 3d5/2 O 1s Na 1s Zn 2p3/2 F 1s<br />

XPS peak<br />

Batch Cleave Surface<br />

Fig. (7.22): Atomic % composition of batched, cleaved and polished glass MOF001_v<br />

(65TeO2-10Na2O-25ZnF2 mol. %).<br />

7.2.2. Chemical and environmental durability<br />

7.2.2.1. Durability of oxide tellurite glasses<br />

Fig. (7.23) shows optical micrographs of glass MOD009 (77TeO2-12ZnO-10Na2O-<br />

1Yb2O3 mol. %) before, and after 60, 120, and 180 sec. immersion in a 1M solution of<br />

NaOH at 21°C (see section 7.1.2.1 for further experimental details).

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