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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 >Gd-incorporation and luminescence properties in sol-gel silica glasses
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Gd-incorporation and luminescence properties in sol-gel silica glasses

机译：溶胶-凝胶二氧化硅玻璃中的Gd掺入和发光特性

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摘要

A thorough study was performed on Gd-doped sol-gel silica glasses, in the concentration range 0-8 mol% Gd. The analyses were carried out as a function of Gd content, before and after a post-densification thermal treatment. Different results concerning optical, vibrational, magnetic, and structural features were gathered in correlated experiments. The presence of Gd-rich nanoclusters was revealed. The size of nanoclusters increases by increasing the dopant concentration and by performing a rapid thermal treatment (RTT) at 1800 degrees C in air, which causes also a remarkable intensity increase of the P-6(7/2) -> S-8(7/2) radio-luminescence transition of Gd3+. Nanoclusters are amorphous, possibly close to a Gd2SiO5 stoichiometry as suggested by fast Fourier transform infrared spectroscopy (FTIR). FTIR studies revealed also the presence of Gd-dimers interacting with OH- groups. Moreover, the presence of isolated Gd 31 ions was detected by electron paramagnetic resonance investigations. Based on the results obtained with different techniques, the Gd-incorporation in silica glass host and the resulting optical properties are discussed. (c) 2008 Elsevier B.V. All rights reserved.
机译：在浓度范围为0-8 mol％Gd的掺Gd溶胶-凝胶二氧化硅玻璃上进行了彻底的研究。在致密化后热处理之前和之后，根据Gd含量进行分析。在相关实验中收集了有关光学，振动，磁性和结构特征的不同结果。揭示了富含Gd的纳米团簇的存在。纳米团簇的尺寸通过增加掺杂剂浓度和在1800摄氏度的空气中进行快速热处理（RTT）来增加，这也导致P-6（7/2）-> S-8（ 7/2）Gd3 +的放射性发光跃迁。纳米团簇是无定形的，可能接近快速傅立叶变换红外光谱（FTIR）所建议的Gd2SiO5化学计量。 FTIR研究表明，Gd-二聚体还与OH-相互作用。此外，通过电子顺磁共振研究检测到分离的Gd 31离子的存在。基于使用不同技术获得的结果，讨论了石英玻璃基质中的Gd掺入和所得的光学性能。 （c）2008 Elsevier B.V.保留所有权利。

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