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Thermal and kinetic parameters of 30LiO-55BO-5ZnO-xTiO-(10-x)VO (0 ≤ x ≤ 10) glasses

Journal of Thermal Analysis and Calorimetry, ISSN: 1588-2926, Vol: 122, Issue: 1, Page: 189-195
2015
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Article Description

In the present investigation, the effects of titanium and vanadium concentration on the thermal properties have been studied for 30LiO-55BO-5ZnO-xTiO-(10-x)VO (0 ≤ x ≤ 10) glasses. To understand the crystallization mechanics, activation energy has been calculated using two different approaches, i.e., Kissinger model and Augis and Bennett model. Using the derivative differential thermal analysis, the inflection point temperature (T ) and crystallization constants k (T) and k (T), for different heating rates, have also been obtained for all the glasses. Furthermore, kinetic parameters such as fluctuation free volume (f ) and change in bulk thermal expansion coefficient (α ) have been calculated for all the glass samples. The replacement of VO by TiO induces phase separation in glasses.

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