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Enthalpy of mixing in 0.8[xB2O3-(1 − x)SiO2]-0.2K2O melts at 973 K |
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| Authors: | AP Ahoussou J Rogez |
| Institution: | a Laboratoire de Chimie-Physique, UFR-SSMT, Université de Cocody, 22 BP 582 Abidjan 22, Côte d’Ivoire b Laboratoire TECSEN, UMR 6122, CNRS-Université Paul Cézanne d’Aix Marseille III, case 251, Avenue Escadrille Normandie Niemen, 13397 Marseille Cedex 20, France |
| Abstract: | 0.8xB2O3-(1 − x)SiO2]-0.2K2O (with 0 ≤ x ≤ 1) glasses were synthesized by melt quenching techniques. DSC curves of the glasses exhibit only one glass transition. Calorimetric measurements of heats of dissolution in lead borate at 973 K indicated small negative enthalpies of mixing. Consequently phase separation was not observed over the whole composition range. The results are in good agreement with the structural data available in the literature. |
| Keywords: | Potassium borosilicate glass Glass transition temperature Solution calorimetry Enthalpy of mixing |
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