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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 >Nature and optical behaviour of heavily europium-doped silica glasses obtained by the sol-gel method
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Nature and optical behaviour of heavily europium-doped silica glasses obtained by the sol-gel method

机译：溶胶-凝胶法制得的重掺silica石英玻璃的性质和光学性能

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Silica glasses doped with Eu3- were prepared by the sol-gel method. The effects of the synthetic procedure on optical properties of the europium heavily doped glasses have been investigated. The fluorescence characteristics of Eu3+ have been measured for several thermal stages of the sol-gel process. In particular, we have studied aggregation of the Eu ions leading to creation of nanocrystallites during the thermal treatment of silica glasses. The size of the nanocrystalites and their structure have been determined by means of high-resolution transmission electron microscopy and X-ray diffraction. The influence of the OH- groups on the luminescence lifetimes of Eu3+ has been studied. A broad luminescence band in the blue region has been observed for the silica glasses possessing silanol (Si-OH) groups. Its intensity decreases with the increasing temperature of sintering for the samples treated in the presence of NH4CI. In the case of those heated at high temperatures, doubly doped with Eu and Al silica glasses, a blue emission assigned to the Eu2+ ions has , been observed. Its intensity increases with the Al3+ ions concentration. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 25]
机译：通过溶胶-凝胶法制备了掺有Eu3-的二氧化硅玻璃。已经研究了合成程序对重掺杂euro玻璃的光学性能的影响。在溶胶-凝胶过程的几个热阶段已测量了Eu3 +的荧光特性。特别地，我们已经研究了在石英玻璃热处理过程中Eu离子的聚集导致纳米晶体的产生。纳米晶体的尺寸及其结构已经通过高分辨率透射电子显微镜和X射线衍射确定。研究了羟基对Eu3 +发光寿命的影响。对于具有硅烷醇（Si-OH）基团的二氧化硅玻璃，已经观察到蓝色区域中的宽发光带。对于在NH 4 Cl存在下处理的样品，其强度随烧结温度的升高而降低。在高温加热的情况下，用Eu和Al二氧化硅玻璃进行双重掺杂，观察到与Eu2 +离子相关的蓝色发射。其强度随Al3 +离子浓度的增加而增加。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：25]

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