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New methodology of synthesis of glass and glass ceramics with luminescent properties

Grant number: 14/25805-4
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2015
Effective date (End): May 31, 2017
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal Investigator:Marcelo Nalin
Grantee:Ricardo Santos Baltieri
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Associated research grant:13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass, AP.CEPID

Abstract

This project aims to obtain and characterize glass matrix containing metal nanoparticles and the study of the optical properties of these new materials. The nanoparticles will be prepared in the core@shell form by sol-gel method, in which the shell will be comprised of silica. Rare earth ions will be incorporated into both glasses and in the shell during the sol-gel synthesis step. Subsequently, the particles will be added to the glass matrix of different chemical compositions originating the transparent glass ceramics. The glasses will be prepared by melting-quenching method and subsequently heat treated at temperatures below the glass transition temperature to relieve internal stresses caused by rapid cooling and increase mechanical resistance.The nanoparticles will be characterized by transmission electron microscopy, X-ray diffraction and atomic force microscopy (AFM). The glasses and glass ceramics will be characterized by thermal analysis (DSC), Raman, UV - Vis and M-Lines spectroscopies, as well as by luminescence. The effects of the presence of nanoparticles in the emission of rare earth ions will be studied by luminescence.