Tellurite And Fluorotellurite Glasses For Active And Passive
Tellurite And Fluorotellurite Glasses For Active And Passive Tellurite And Fluorotellurite Glasses For Active And Passive
4. Thermal properties and glass stability; MDO 105 mol. %) and MOF008 (85TeO2-10Na2O-5ZnF2 mol. %) This glass melting series obeys the composition rule (90-x)TeO2.xZnF2.10Na2O (mol. %), for 5 ≤ x ≤ 30. o C MOF001 MOF004 MOF005 MOF006 MOF007 MOF008 100 200 300 400 500 Temperature / o C Fig (4.14): DTA traces of glasses MOF001 (65TeO2-10Na2O-25ZnF2 mol. %), MOF004 (60TeO2-10Na2O-30ZnF2 mol. %), MOF005 (70TeO2-10Na2O-20ZnF2 mol. %), MOF006 (75TeO2-10Na2O-15ZnF2 mol. %), MOF007 (80TeO2-10Na2O-10ZnF2 mol. %) and MOF008 (85TeO2-10Na2O-5ZnF2 mol. %) [10]. It can be seen from these curves that the glass transition temperature falls with increasing fluoride and the Tx-Tg gap widens, thus the glass becomes more stable. Fig. (4.15) illustrates this.
4. Thermal properties and glass stability; MDO 106 Temperature / o C 280 260 240 220 200 180 160 140 120 100 T g T x -T g 0 5 10 15 20 25 30 35 ZnF 2 / mol. % Fig. (4.15): Variation in Tg and Tx-Tg with increasing ZnF2 content from fig (4.14). Effect of PbF2 and WO3 Fig. (4.16) shows DTA traces for glasses MOF002 (70TeO2-10Na2O-10ZnF2-10PbF2 mol. %), MOF003 (65TeO2-10Na2O-20ZnF2-5PbF2 mol. %) and MOF014 (65TeO2- 10WO3-25 ZnF2 mol. %).
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4. Thermal properties and glass stability; MDO 105<br />
mol. %) and MOF008 (85TeO2-10Na2O-5ZnF2 mol. %) This glass melting series obeys<br />
the composition rule (90-x)TeO2.xZnF2.10Na2O (mol. %), for 5 ≤ x ≤ 30.<br />
<br />
o C<br />
MOF001<br />
MOF004<br />
MOF005<br />
MOF006<br />
MOF007<br />
MOF008<br />
100 200 300 400 500<br />
Temperature / o C<br />
Fig (4.14): DTA traces of glasses MOF001 (65TeO2-10Na2O-25ZnF2 mol. %), MOF004<br />
(60TeO2-10Na2O-30ZnF2 mol. %), MOF005 (70TeO2-10Na2O-20ZnF2 mol. %),<br />
MOF006 (75TeO2-10Na2O-15ZnF2 mol. %), MOF007 (80TeO2-10Na2O-10ZnF2 mol. %)<br />
and MOF008 (85TeO2-10Na2O-5ZnF2 mol. %) [10].<br />
It can be seen from these curves that the glass transition temperature falls with increasing<br />
fluoride and the Tx-Tg gap widens, thus the glass becomes more stable. Fig. (4.15)<br />
illustrates this.
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