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

Grant number: 19/11446-6
Support Opportunities:Scholarships abroad - Research Internship - Doctorate (Direct)
Effective date (Start): September 01, 2019
Effective date (End): August 31, 2020
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Paulo Sergio Pizani
Grantee:Rafaella Bartz Pena
Supervisor: Martinet
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Research place: Université Claude Bernard Lyon 1, France  
Associated to the scholarship:17/11868-2 - Correlation between structure and optical properties of (Äx, A'1-x)O + SiO2(A,A'= Pb,Ni,Co,Cr) glass ceramic serie under high hydrostatic pressure, BP.DD


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)

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