Tellurite And Fluorotellurite Glasses For Active And Passive

4. Thermal properties and glass stability; MDO 86
temperature difference, is assumed to be proportional to the heat released per unit time of
the sample. Therefore, the y-axis of the DSC trace is expressed in terms of energy per
unit time (i.e. Watts) [3].
The DSC has two control cycle portions, one to maintain zero temperature difference
and one to keep the average temperature of the sample and the reference at the set point.
These processes switch back and forth quickly to maintain both simultaneously [3].
4.1.2. Identification of transformations
The following methods of identifying transformations were performed using automatic
fitting functions in the Perkin Elmer Pyris software. Fig. (4.2) shows a typical DTA trace
of glass MOF005 (70TeO2-10Na2O-20ZnF2 (mol. %)) to illustrate how the characteristic
temperatures were obtained in this study.
←← Endothermic ∆T / °C Exothermic →
Tg
100 150 200 250 300 350 400 450
Temperature / °C
Fig. (4.2) DTA trace of glass MOF005 (70TeO2-10Na2O-20ZnF2 (mol. %)).
Tx
Tm