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Systematic study of the crystallization process in boron-tungstate rare earths containing glasses

Grant number: 18/19812-9
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2018
Effective date (End): November 30, 2019
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Marcelo Nalin
Grantee:Ana Carolina Silva Sampaio
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 in the synthesis and characterization of glasses in the boron-tungstate system containing rare earths. Glasses will be prepared using the well established melt-quenching technique. After chosen the most stable glass compositions presenting high rare earth contents, the samples will be treated thermally at temperatures experimentally determined in order to obtain transparent glass-ceramics. In a such way, we hope to obtain transparent glass-ceramics where the rare earth ion will be present in the crystalline phase. Both glasses and glass-ceramics will be characterized systematically, by means of thermal analysis, DSC, X-ray diffraction, Infrared, Raman and luminescence spectroscopes as well as Nuclear magnetic resonance (NMR), scanning and electronic transmission microscopies.