Structural study of pure and cobalt-doped lead metasilicate glasses and glass-ceramics under high-temperature compression

Abstract

Lead silicate glasses are widely used in different commercial applications due mostly to their high refractive index and X- and gamma-ray attenuation, which are closely linked to their high density. In this research project, pure and cobalt-doped lead metasilicate glasses and glass-ceramics will be submitted to simultaneous high temperature and high hydrostatic pressure compressions, which may increase permanently their density. Due to the relaxation process, the glasses compressed under hot-temperatures show structural distinctions when contrasted to room temperature compressed ones, densifying under lower applied pressures. In order to understand the induced structural transformations, these materials will be investigated in-situ and ex-situ by Raman Spectroscopy, Brillouin Spectroscopy and Photoluminescence. (AU)