Density fluctuations in oxide glasses investigated by SAXS Auteur(s): Levelut C., Le Parc R., Faivre A., Brüning R., Champagnon B., Martinez V., Simon J., Bley F., Hazemann J.L. (Article) Publié: Journal Of Applied Crystallography, vol. 40 p.S512-S516 (2007) Ref HAL: hal-00504416_v1 Exporter : BibTex | endNote Résumé: The structure of glasses is characterized by the existence of density and composition fluctuations on the nanometre scale. We present three examples of the use of small-angle X-ray scattering to get information about these density fluctuations. The thermal history and OH content were observed to have a huge influence. The static compressibility decreases when the OH content or fictive temperature increase. We showed that temperature scanning small-angle X-ray scattering can provide an accurate description of the position, width and shape of the glass transition. Commentaires: Suppl. 1 |