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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2005

In situ measurements of density fluctuations and compressibility in silica glass as a function of temperature and thermal history

Résumé

In this paper, small-angle X-ray scattering measurements are used to determine the different compressibility contributions, as well as the isothermal compressibility, in thermal equilibrium in silica glasses having different thermal histories. Using two different methods of analysis, in the supercooled liquid and in the glassy state, we obtain respectively the temperature and fictive temperature dependences of the isotheraml compressibility. The values obtained in the glass and supercooled liquid states are very close to each other. They agree with previous determinations of the literature. The compressibility in the glass state slightly decreases with increasing fictive temperature. The relaxational part of the compressibility is also calculated and compared to previous determinations. We discussed the small differences between the different determinations.
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Dates et versions

hal-00011136 , version 1 (11-10-2005)

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Claire Levelut, Annelise Faivre, Rozenn Le Parc, Bernard Champagnon, Jean-Louis Hazemann, et al.. In situ measurements of density fluctuations and compressibility in silica glass as a function of temperature and thermal history. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2005, 72, pp.224201. ⟨10.1103/PhysRevB.72.224201⟩. ⟨hal-00011136⟩
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