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Structure, Thermal Behavior, Chemical Durability, and Optical Properties of the Na 2 O–Al 2 O 3 –TiO 2 –Nb 2 O 5 –P 2 O 5 Glass System
Author(s) -
Teixeira Zaine,
Alves Oswaldo Luiz,
Mazali Italo Odone
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.01399.x
Subject(s) - niobium , durability , materials science , titanium , raman spectroscopy , refractive index , thermal stability , analytical chemistry (journal) , titanio , fourier transform infrared spectroscopy , phosphate glass , infrared , mineralogy , nuclear chemistry , chemical engineering , chemistry , optics , metallurgy , transition metal , composite material , biochemistry , physics , optoelectronics , chromatography , doping , engineering , catalysis
The FTIR, Raman, UV‐Vis, 31 P 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 − x TiO 2 –(45− x )Nb 2 O 5 –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.