Density and density fluctuations anomalies of SiO2 glass:comparison and light scattering study.

Bernard Champagnon (1) , Valérie Martinez (1) , Christine Martinet (1) , Rozenn Le Parc (2) , Claire Levelut (2)

1 LPCML - Laboratoire de Physico-Chimie des Matériaux Luminescents
2 LCVN - Laboratoire des colloïdes, verres et nanomatériaux

The objective of this work is to compare density and density fluctuations of silica as function of temperature in the anomalous domain between 950°C and 1480°C by comparing Archimedes' macroscopic measurements and light scattering. A parallel qualitative behaviour is observed between density fluctuations and macroscopic density. Density fluctuations of silica show a minimum as function of the temperature as the macroscopic density does: this correlation indicate a possible common origin of both observations.

Mots clés: Physical Sciences

Bernard Champagnon, Valérie Martinez, Christine Martinet, Rozenn Le Parc, Claire Levelut. Density and density fluctuations anomalies of SiO2 glass:comparison and light scattering study.. Philosophical Magazine, 2007, 87 (3-5), pp.691-695. ⟨10.1080/14786430601032345⟩. ⟨hal-00513791⟩