Sound velocity in alumino-silicate liquids determined up to 2550 K from Brillouin spectroscopy: glass transition and crossover temperatures | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Sound velocity in alumino-silicate liquids determined up to 2550 K from Brillouin spectroscopy: glass transition and crossover temperatures

Type de publication:

Journal Article

Source:

Journal of Non-Crystalline Solids, Volume 351, Ticket 1, p.61-68 (2005)

ISBN:

0022-3093

Mots-clés:

CAO-AL2O3-SIO2 SYSTEM; ELASTIC PROPERTIES; RELAXATION; VISCOSITY

Résumé:

Hypersonic longitudinal sound velocities in five silicate and alumino-silicate liquids have been measured betweeen 293 and 2550K by Brillouin spectroscopy. Together with previous observations for four other glasses and liquids of the system SiO2- Al2O3-CaO-MgO, these results are used to discuss changes in hypersonic velocities in three adjacent temperature domains. i.e., below, in, and above the glass transformation range. The temperature dependence of Brillouin velocities is consistent with the observed variations with temperature of viscosity, density.. and mean heat capacity for the same three temperature domains. These variations of physical properties of alumino-silicate liquids are qualitatively in agreement with the Inherent Structure Theory for liquids. (C) 2004 Elsevier B.V. All rights reserved.

Notes:

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