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Tellurite And Fluorotellurite Glasses For Active And Passive

Tellurite And Fluorotellurite Glasses For Active And Passive

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4. Thermal properties and glass stability; MDO 106<br />

Temperature / o C<br />

280<br />

260<br />

240<br />

220<br />

200<br />

180<br />

160<br />

140<br />

120<br />

100<br />

T g<br />

T x -T g<br />

0 5 10 15 20 25 30 35<br />

ZnF 2 / mol. %<br />

Fig. (4.15): Variation in Tg and Tx-Tg with increasing ZnF2 content from fig (4.14).<br />

Effect of PbF2 and WO3<br />

Fig. (4.16) shows DTA traces for glasses MOF002 (70TeO2-10Na2O-10ZnF2-10PbF2<br />

mol. %), MOF003 (65TeO2-10Na2O-20ZnF2-5PbF2 mol. %) and MOF014 (65TeO2-<br />

10WO3-25 ZnF2 mol. %).

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