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)
• Start date: September 01, 2019
• End date: 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
• Institution abroad: 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

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)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PENA, R. B.; DESCHAMPS, T.; AMATO, A.; LE FLOCH, S.; PIZANI, P. S.; MARTINET, C.. Normal to abnormal behavior of PbSiO3 glass: A vibrational spectroscopy investigation under high-pressure. Journal of Non-Crystalline Solids, v. 589, p. 9-pg., 2022-04-21. (19/11446-6, 13/07793-6, 17/11868-2)