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Preparation of fluoride-phosphate glass and glass-ceramics doped with rare-earth ions for potential use as radiation detectors

Grant number: 18/03931-9
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): August 01, 2018
Effective date (End): July 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Andrea Simone Stucchi de Camargo Alvarez Bernardez
Grantee:Gustavo Galleani
Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass, AP.CEPID
Associated scholarship(s):19/12442-4 - Thermal poling of oxyfluoride glasses: generation of second order non-linear properties (SONL) and surface modification by microimprinting, BE.EP.PD

Abstract

The purpose of the project is the preparation and characterization of glasses and glass-ceramics of mixed fluoride-phosphate systems based on indium and / or sodium phosphate with alkali metal fluoride doped with rare earth ions with specific characteristics for the development of new materials that have radiation detection properties of the X- type and UV radiation through the process called scintillation. Great emphasis will be given to the preparation and the optical and structural characterization of glasses, as well as the study of crystallization and its photophysical properties. The glasses will be prepared by themelting-quenching technique and the glass-ceramics will be obtained by heat treatment in the glass.The glasses will be prepared from the components: sodium metaphosphate NaPO3, and indium phosphate In(PO3)3; alkali fluorides: NaF, LiF; alkaline-earth fluorides: ZnF2, MgF2, BaF2, CaF2, SrF2; and InF3 indium fluoride; and doped with the rare earth fluorides CeF3, EuF3, TbF3, GdF3. They should contain a relatively high concentration of indium fluoride or in order to ensure good chemical durability, good solubility of rare earth ions to a minimum of 10 wt.%, Without undergoing devitrification during the glass synthesis process, and provide a environment for the luminescent species in order to obtain a higher emission efficiency.After having determined different glass compositions meeting these requirements, crystallization tests will be done by heat treatment. Glass pieces will thus be annealed at a temperature above the glass transition temperature. Compositions that exhibit crystallization in the volume will then be selected to optimize crystallization parameters such as temperature and time of heat treatment.Thermal, optical and structural properties will be studied by Thermal Analysis (DSC and DMTA), X-ray Diffraction (XRD), UV-Vis-NIR Spectroscopy, Raman, Nuclear Magnetic Resonance (NMR) and M-Lines, Optical Microscopy and Luminescence in glasses and glass-ceramic doped with the rare earth ions CeF3, EuF3, TbF3, GdF3 and others.

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)
GUIDINI, PRISCILA; GALLEANI, GUSTAVO; FARIA, WALTER; SILVA, IGOR D. A.; ECKERT, HELLMUT; DE CAMARGO, ANDREA S. S. Structural and spectroscopic properties of phosphate-tungsten glasses doped with Nd3+ and Tb3+. Journal of Non-Crystalline Solids, v. 529, FEB 1 2020. Web of Science Citations: 0.
GALLEANI, GUSTAVO; DOERENKAMP, CARSTEN; SANTAGNELI, SILVIA; MAGON, CLAUDIO JOSE; DE CAMARGO, ANDREA S. S.; ECKERT, HELLMUT. Compositional Optimization of Emission Properties for Rare-Earth Doped Fluoride Phosphate Glasses: Structural Investigations via NMR, EPR, and Optical Spectroscopies. Journal of Physical Chemistry C, v. 123, n. 51, p. 31219-31231, DEC 26 2019. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.