High barium content lead and alkaline-free glasses
- Da Silva, Maviael J.
- Moya, J. S.
- Pecharromán, Carlos
- Sanz Lázaro, Jesús
- Mello-Castanho, Sonia
Publication date
May 2019
DOI Publisher
Elsevier BV ISSN
0167-577X Journal
Materials Letters Citation count (estimate)
3Abstract
Four glass compositions of the system BaO-Al2O3-SiO2 with high content of BaO>50% mol and with B2O3 addition (3-10 wt%) were melted at 1400 °C. The effect of alkaline earth BaO oxide on the glass phase separation and on refraction index n is investigated. IR and MAS-NMR spectroscopy are used for structural characterization. Finally stable alkaline free glasses with a content of BaO ranging from 47.4 Mol.% to 54.5 Mol.% and with a n=1.62±0.01 at 468.1 nm have been obtained.This work has been supported by the Brazilian CNPq (237958/2012-0), Spanish MINECO (MAT2010-19837-06 and MAT2011-29174-C02-01) and CSIC, Spain (201360E012)
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