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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structural characteristic of Na2O-P2O5-GeO2 glass systems
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Structural characteristic of Na2O-P2O5-GeO2 glass systems

机译：Na2O-P2O5-GeO2玻璃体系的结构特征

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摘要

Phosphate glasses based on xNa(2)O-0.5P(2)O(5)-(0.5-x)GeO2 (0.0 <= x <= 0.5) mol%, were prepared and their structures were characterized by magic angle spinning (MAS) nuclear magnetic resonance (NMR), Raman and IR spectroscopy techniques. It was found that the phosphate network of these glasses is composed of middle (Q(2)) and branching (Q(3)) phosphate tetrahedra, whereas germanium part in the network is composed of three- or four-membered GeO4 tetrahedral rings. It was also found that the germanium tetrahedral are randomly connected to either Q(2) or Q(3) phosphate units in the network. The glass network, especially the Q(2) units can be modified by the presence of Na ions. This modification is primarily associated with the phosphate. It is found that these glasses behave as if they are formed from a solution of GeO2 and sodium-phosphate glass with various GeO4 units and the Q(2) and Q(3) phosphate units randomly distributed in the network. (C) 2007 Elsevier B.V. All rights reserved.
机译：制备了基于xNa（2）O-0.5P（2）O（5）-（0.5-x）GeO2（0.0 <= x <= 0.5）mol％的磷酸盐玻璃，并通过魔角旋转对其结构进行了表征（ MAS）核磁共振（NMR），拉曼光谱和红外光谱技术。发现这些玻璃的磷酸盐网络由中间（Q（2））和分支（Q（3））磷酸盐四面体组成，而网络中的锗部分则由三元或四元GeO4四面体环组成。还发现四面体锗随机连接到网络中的Q（2）或Q（3）磷酸盐单元。玻璃网络，尤其是Q（2）单元可以通过Na离子的存在进行修饰。这种修饰主要与磷酸盐有关。发现这些玻璃的行为就像是由具有各种GeO4单元的GeO2和磷酸钠玻璃的溶液以及随机分布在网络中的Q（2）和Q（3）磷酸单元的溶液形成的。 （C）2007 Elsevier B.V.保留所有权利。

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