Resumen

DAGDUG, L.; GARCIA-COLIN, L.S.  y  GOLDSTEIN, P.. An entropy based theory for the viscosity of strong glasses. Rev. mex. fis. [online]. 2005, vol.51, n.2, pp.144-148. ISSN 0035-001X.

One of the main applications of the stochastic matrix method is the evaluation of the probability of finding boroxol rings and dendrites in a boron oxide glass. In this work, we calculate the configurational entropy of B₂0₃ using this probability and Shannon's definition of entropy. The isentropic temperature is evaluated obtaining a very good agreement with experimental data. Entropy is introduced into the Adam-Gibbs equation to calculate viscosity. The resulting expression fits the complete range of temperatures for the supercooled liquid.

Palabras llave : Supercooled liquid; glass transition; viscosity; entropy.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )