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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 >Electronic polarizability, optical basicity and XPS spectra of Sb2O3-B2O3 glasses
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Electronic polarizability, optical basicity and XPS spectra of Sb2O3-B2O3 glasses

机译：Sb2O3-B2O3玻璃的电子极化率，光学碱度和XPS光谱

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The average electronic polarizability of the oxide ion (alpha(O2-)) and optical basicity (Lambda) of Sb2O3-B2O3 glasses have been estimated from the values of refractive index and optical band gap, and the O1s and Sb3d binding energies have been measured from X-ray photoelectron spectroscopy (XPS) spectra in order to clarify the electronic structure of oxide glasses. Both alpha(O2-) and Lambda increase with increasing Sb2O4 content and conversely both O1s and Sb3d binding energies decrease. Close correlations are observed among them, and particularly it has been confirmed that the O1s binding energy is a good measure of the optical basicity of these glasses. The O1s signal in XPS spectra consists of two components: the O1s peak with higher binding energies is assigned to B-O-B bonds and that with lower binding energies corresponds to Sb-O-B and Sb-O-Sb bonds. It has been also suggested that a substantial rearrangement in the bridging oxygen bonding takes place at about 40 mol% Sb2O3: with a decrease in the number of B-O-B bonds and an increase in the number of Sb-O-B and Sb-O-Sb bonds. The covalency of Sb-O bonds increases with increasing Sb2O3 content, and its origin has been discussed in view of the good correlation between O1s and Sb3d binding energies, suggesting the formation of Sb-O bonds rich in p-character due to the increased probability of back donation of electron density from O2- to Sb3+ ions. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 47]
机译：根据折射率和光学带隙的值估算了Sb2O3-B2O3玻璃的平均离子极化率（α（O2-））和光学碱度（Lambda），并测量了O1s和Sb3d的结合能借助X射线光电子能谱（XPS）光谱来阐明氧化物玻璃的电子结构。随着Sb2O4含量的增加，α（O2-）和Lambda均增加，相反，O1和Sb3d的结合能均降低。在它们之间观察到密切的相关性，特别是已经证实O1s的结合能是这些玻璃的光学碱性的良好度量。 XPS光谱中的O1s信号由两个成分组成：具有较高结合能的O1s峰分配给B-O-B键，具有较低结合能的O1s峰对应于Sb-O-B和Sb-O-Sb键。还已经提出，在约40mol％的Sb 2 O 3处发生桥连氧键的实质性重排：随着B-O-B键的数量减少以及Sb-O-B和Sb-O-Sb键的数量增加。 Sb-O键的共价性随Sb2O3含量的增加而增加，并且鉴于O1与Sb3d结合能之间的良好相关性已讨论了其起源，这表明由于概率增加而形成了富含p-字符的Sb-O键从O2-离子向Sb3 +离子的电子密度反捐赠。 （C）2000 Elsevier Science B.V.保留所有权利。 [参考：47]

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