Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/75402
Type: Artigo de periódico
Title: Structure, thermal behavior, chemical durability, and optical properties of the Na2O-Al2O3-TiO2-Nb2O5-P2O5 glass system
Author: Teixeira, Z
Alves, OL
Mazali, IO
Abstract: The FTIR, Raman, UV-Vis, P-31 MAS-NMR, DTA, and refractive index measurements have been combined to investigate a series of glasses with the general formula 20Na(2)O-5Al(2)O(3)-xTiO(2)-(45-x)Nb2O5-30P(2)O(5), 15 <= x <= 45. The glass structure, as well as thermal, optical, and chemical durability properties, were then described as functions of the f(Nb)/f(Ti) ratio. An increase of the f(Nb)/f(Ti) ratio correlates with a decrease in length of the average phosphate chains linked through Nb-O-P and Ti-O-P bonds, with an increase in the glass stability and with increase in the linear refractive indices at 632.8 nm from 1.79 to 1.89. Furthermore, niobium is more effective than titanium in improving chemical durability.
Country: Inglaterra
Editor: Blackwell Publishing
Rights: fechado
Identifier DOI: 10.1111/j.1551-2916.2006.01399.x
Date Issue: 2007
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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