Optical and structural properties of Sr-Nb-phosphate glasses

被引：57

作者：

Chu, C. M. ^{[2
]}

Wu, J. J. ^{[1
]}

Yung, S. W. ^{[1
]}

Chin, T. S. ^{[3
]}

Zhang, T. ^{[4
]}

Wu, F. B. ^{[1
]}

机构：

[1] Natl United Univ, Dept Mat Sci & Engn, Miaoli 36003, Taiwan

[2] Natl United Univ, Dept Chem Engn, Miaoli 36003, Taiwan

[3] Feng Chia Univ, Dept Mat Sci & Engn, Taichung 40724, Taiwan

[4] Fuzhou Univ, Inst Mat Res, Fuzhou 350108, Fujian, Peoples R China

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2011年 / 357卷 / 03期

关键词：

Strontium-niobium-phosphate glasses; Optical properties; UV-Vis spectra; XPS spectra; FTIR spectra; POLARIZABILITY; SPECTROSCOPY;

D O I：

10.1016/j.jnoncrysol.2010.12.009

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This research studied optical and structural properties of SrO-Nb2O5-P2O5 glasses containing 0-25 mol% Nb2O5 and 35-60 mol%SrO using spectra of UV-Vis, FOR and XPS. Our aim was to work new moldable glasses which are colorless with high refractive index and transmittance, and their correlation with glass structure. Nb2O5 plays the role as an intermediate of glass formation, and transforms the role to network-former or glass-modifier depending on composition. Refractive index increases monotonically with Nb2O5 content at the expense of transmittance, and specific coloring which occurs in ternary compositions with the ratio P2O5/SrO > 1. This effect arises from much increased [Nb3+ and Nb4+] fraction, as quantitatively deconvoluted in Nb3d XPS spectra, in the ligand [NbO6](octahedral) which is supported by FTIR and O1s XPS spectra. As the ratio P2O5/SrO <= 1, Nb2O5 is more of a network former and [NbO6](octahedral) structure turns into [NbO4](tetrahedron) with partial Nb-O-center dot center dot center dot(Sr) bonding turns into (Nb-O-Nb)(tetrahedron), coloring disappears. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：939 / 945

页数：7

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