Abstract
The present paper reports on the effect of MoO3 on the glass transition, thermal stability and crystallization kinetics for (40PbO–20Sb2O3–40As2O3)100−x –(MoO3) x (x = 0, 0.25, 0.5, 0.75 and 1 mol%) glasses. Differential scanning calorimetry (DSC) results under non-isothermal conditions for the studied glasses were reported and discussed. The values of the glass transition temperature (T g) and the peak temperature of crystallization (T p) are found to be dependent on heating rate and MoO3 content. From the compositional dependence and the heating rate dependence of T g and T p, the values of the activation energy for glass transition (E g) and the activation energy for crystallization (E c) were evaluated and discussed. Thermal stability for (40PbO–20Sb2O3–40As2O3)100−x –(MoO3) x glasses has been evaluated using various thermal stability criteria such as ΔT, H r , H g and S. Moreover, in the present work, the K r(T) criterion has been considered for the evaluation of glass stability from DSC data. The stability criteria increases with increasing MoO3 content up to x = 0.5 mol%, and decreases beyond this limit.
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The authors wish to thank Al-Azhar University for the financial support.
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Aly, K.A., Dahshan, A. & Saddeek, Y.B. Effect of MoO3 additions on the thermal stability and crystallization kinetics of PbO–Sb2O3–As2O3 glasses. J Therm Anal Calorim 100, 543–549 (2010). https://doi.org/10.1007/s10973-009-0018-3
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DOI: https://doi.org/10.1007/s10973-009-0018-3