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High-Pressure Plastic Deformation of Lead Metasilicate Glass Accessed by Raman Spectroscopy: Insights into the Q n distribution

Journal of non-crystalline solids, 2021-09, Vol.567 [Peer Reviewed Journal]

Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 0022-3093 ;EISSN: 1873-4812 ;DOI: 10.1016/j.jnoncrysol.2021.120930

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  • Title:
    High-Pressure Plastic Deformation of Lead Metasilicate Glass Accessed by Raman Spectroscopy: Insights into the Q n distribution
  • Author: Pena, R. B. ; Laurent, V ; Deschamps, T ; Romeo, E ; Picinin, A. ; Martinet, Christine ; Pizani, P
  • Subjects: Mechanics ; Physics ; Solid mechanics
  • Is Part Of: Journal of non-crystalline solids, 2021-09, Vol.567
  • Description: In this study, lead metasilicate glasses (PbSiO3) were densified at different maximum pressures in a diamond anvil cell (DAC) at room temperature. The densified glass samples were investigated ex-situ by Raman spectroscopy to probe their pressure-induced plastic deformation limit and permanent structural modifications on the Qn distribution. With a high Pb content, this glass exhibits a low elastic limit at ~4 GPa, which is linked to an initial compact structure. Spectral curve fitting of the high-frequency region of the Raman spectra, consisting of symmetric Si-O stretching modes, exhibit subtle Qn population modifications with maximum pressure. This reveals silica network depolymerization where the proportion of non-bridging oxygens (NBO) increases at the expense of bridging oxygens (BO). Possible densification mechanisms are discussed in contrast to those known in other silicate glasses
  • Publisher: Elsevier
  • Language: English
  • Identifier: ISSN: 0022-3093
    EISSN: 1873-4812
    DOI: 10.1016/j.jnoncrysol.2021.120930
  • Source: Hyper Article en Ligne (HAL) (Open Access)
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