Authors: S K Arya K Singh
Publish Date: 2015/05/19
Volume: 122, Issue: 1, Pages: 189-195
Abstract
In the present investigation the effects of titanium and vanadium concentration on the thermal properties have been studied for 30Li2O–55B2O3–5ZnO–xTiO2–10−xV2O5 0 ≤ x ≤ 10 glasses To understand the crystallization mechanics activation energy has been calculated using two different approaches ie Kissinger model and Augis and Bennett model Using the derivative differential thermal analysis the inflection point temperature T f and crystallization constants k yT and k fT for different heating rates have also been obtained for all the glasses Furthermore kinetic parameters such as fluctuation free volume f g and change in bulk thermal expansion coefficient α f have been calculated for all the glass samples The replacement of V2O5 by TiO2 induces phase separation in glasses
Keywords: