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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 >Use of EELS to study the absorption edge of fused silica
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Use of EELS to study the absorption edge of fused silica

机译：使用EELS研究熔融石英的吸收边缘

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Electron energy loss spectroscopy (EELS) was used to study the absorption edge of various types of fused silica. The relationships between transmission (%T), fictive temperature (T-f), band gap energy (Eo), and slope of the Urbach tail (K) were investigated. The trends are in agreement with other published studies and provide initial validation of the new technique. The measured band gap energies, E-0, varied very little among the different silicas, and there was no obvious relationship between E0 and either %T or T-f. The slopes of the Urbach tail, K, varied significantly and were related to both %T and structural disorder (influenced by both T-f and F concentration). The observed trends were an increase in transmission with an increase in K, and an increase in K with a decrease in structural disorder. The results of this work support the idea that structural disorder affects transmission near the absorption edge. (c) 2006 Elsevier B.V. All rights reserved.
机译：电子能量损失谱（EELS）用于研究各种类型熔融石英的吸收边缘。研究了透射率（％T），虚拟温度（T-f），带隙能量（Eo）和Urbach尾巴斜率（K）之间的关系。趋势与其他已发表的研究一致，并提供了对新技术的初步验证。在不同的二氧化硅之间，测得的带隙能E-0变化很小，E0与％T或T-f之间没有明显的关系。 Urbach尾巴的斜率K显着变化，并且与％T和结构紊乱有关（受T-f和F浓度的影响）。观察到的趋势是，随着钾的增加，传播增加;随着结构紊乱的减少，钾增加。这项工作的结果支持以下观点：结构紊乱会影响吸收边缘附近的传输。 （c）2006 Elsevier B.V.保留所有权利。

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