Structure and nonlinear optical properties of sodium-niobium phosphate glasses

被引：76
作者：
Flambard, A. [1 ]
Videau, J. J. [2 ]
Delevoye, L. [1 ]
Cardinal, T. [2 ]
Labrugere, C. [2 ]
Rivero, C. A. [2 ,3 ]
Couzi, M. [4 ]
Montagne, L. [1 ]
机构：
[1] Univ Sci & Tech Lille Flandres Artois, UCCS, CNRS,UMR 8181, Ecole Natl Super Chim, F-59652 Villeneuve Dascq, France
[2] Univ Bordeaux 1, ICMCB, CNRS, UPR 9048, F-33608 Pessac, France
[3] Univ Cent Florida, Coll Opt & Photon, Orlando, FL 32816 USA
[4] Univ Bordeaux 1, Inst Mol Sci, CNRS, UMR 5255, F-33405 Talence, France
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 30期
关键词：
phosphates; NMR; MAS-NMR and NQR; structure; XPS;
D O I：
10.1016/j.jnoncrysol.2008.03.017
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：
The structural description of xNb(2)O(5)-(1 - x)(NaPO3) (0 <= x <= 0.40) glass network is reported through high-field (18.8 T) O-17 and Nb-93 nuclear magnetic resonance, O1s X-ray photoelectrom spectroscopy and Raman spectroscopy. The different oxygen sites (POP, PONa, NbOP and NbONb) are resolved on the spectra, their relative proportion determined and compared to indirect calculations obtained from the decomposition of P-31 NMR spectra. A good agreement is obtained, thus confirming the formation of the Nb(OP)(6-y)(ONb)(y) units with increasing y leading to the clusterization of NbO6 octahedra, mainly for x > 0.2, which is related to the incomplete dissociation of Nb2O5 in the NaPO3 melt. The formation of these clusters is responsible for the large increase of the nonlinear optical properties, mainly due to the high polarizability of the Nb-O-Nb bond. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3540 / 3547
页数：8
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