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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 >Structure of lead oxyfluorosilicate glasses: X-ray photoelectron and nuclear magnetic resonance spectroscopy and molecular dynamics simulation
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Structure of lead oxyfluorosilicate glasses: X-ray photoelectron and nuclear magnetic resonance spectroscopy and molecular dynamics simulation

机译：含氧氟硅酸铅玻璃的结构：X射线光电子和核磁共振光谱及分子动力学模拟

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X-ray photoelectron (XPS) and Si-29 magic angle spinning (MAS)-NMR spectroscopy have been used to examine the chemical slates of fluorine, oxygen, silicon and lead atoms in the glasses of composition xPbF(2) . (100 - y - x)PbO . gamma SiO2 (x = 0, 5, 10,15, 20, 30 mol%, y = 30, 50, 60 mol%). The analysis of the F 1s spectra indicated that Pb2+ and F- ions are preferentially located among the Si-O skeleton forming ionic Pb-F clusters. The fraction of the bridging (BO) and non-bridging oxygen (NBO) atoms was derived from the O 1s spectra. The network of the fluorine-containing glasses was concluded to depend on the ratio PbO/SiO2; when the ratio PbO/SiO2 was lower than 0.5, not only Pb atoms but also F atoms play a role as network modifiers, while when the ratio PbO/SiO2 is higher than 1.33, part of Pb atoms plays a role as a glass network former. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 61]
机译：X射线光电子（XPS）和Si-29幻角旋转（MAS）-NMR光谱已用于检查成分xPbF（2）的玻璃中氟，氧，硅和铅原子的化学形态。 （100-y-x）PbO。 γSiO 2（x ＝ 0、5、10、15、20、30mol％，y ＝ 30、50、60mol％）。 F 1s光谱分析表明，Pb2 +和F-离子优先位于形成离子性Pb-F簇的Si-O骨架中。从O 1s光谱中得出桥接（BO）和非桥接氧（NBO）原子的分数。得出结论，含氟玻璃的网络取决于PbO / SiO2的比值。当PbO / SiO2比值低于0.5时，不仅Pb原子而且F原子都起网络改性剂的作用，而当PbO / SiO2比值高于1.33时，部分Pb原子起玻璃网络形成剂的作用。 。 （C）2000 Elsevier Science B.V.保留所有权利。 [参考：61]

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