%0 Journal Article
%T In situ measurements of density fluctuations and compressibility in silica glass as a function of temperature and thermal history
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%+ Laboratoire de Physico-Chimie des Matériaux Luminescents (LPCML)
%+ Laboratoire de Cristallographie
%+ Laboratoire de thermodynamique et physico-chimie métallurgiques (LTPCM)
%A Levelut, Claire
%A Faivre, Annelise
%A Le Parc, Rozenn
%A Champagnon, Bernard
%A Hazemann, Jean-Louis
%A Simon, Jean-Paul
%Z accepte dans physical review B
%< avec comité de lecture
%@ 1098-0121
%J Physical Review B: Condensed Matter and Materials Physics (1998-2015)
%I American Physical Society
%V 72
%P 224201
%8 2005
%D 2005
%Z cond-mat/0510266
%R 10.1103/PhysRevB.72.224201
%K glass transition
%K SAXS
%K amorphous silica
%K compressibility
%K fictive temperature
%Z PACS 61.43.Fs,,61.10.Eq, 51.35.+a, 64.70.Pf
%Z Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn]Journal articles
%X 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.
%G English
%2 https://hal.science/hal-00011136/document
%2 https://hal.science/hal-00011136/file/levelutprb-art-rev.pdf
%L hal-00011136
%U https://hal.science/hal-00011136
%~ UGA
%~ CNRS
%~ UNIV-LYON1
%~ UNIV-MONTP2
%~ INPG
%~ LCVN
%~ UNIV-MONTPELLIER
%~ UDL
%~ UNIV-LYON
%~ UM1-UM2