Abstract
We present in this paper a thermostatistical model of formation of vitreous B2O3 which is based on a description of agglomeration of BO3 triangles resulting in medium-range clusters and on the construction of the partition function related to the space of all possible pathways leading to this set of clusters. With one fitted parameter which is the boroxol formation energy of 5.3+or-0.7 kcal mol-1, the model predicts the usual shape of the internal energy function and the heat capacity curves, as well as the fraction of boroxol rings of 83%. In the last section, we investigate the structural evolution of molten B2O3 during the glass transition process.
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