Impact of bridging oxygens formation on optical properties of Fe3+ doped Li2O–Al2O3–SiO2–TiO2 glasses

A. Faeghinia
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Abstract

In this study, the structural chemistry of Fe3+ doped Li2O–Al2O3–SiO2–TiO2 (LAST) glasses has been analyzed utilizing UV-Vis spectroscopy. Optical parameters like absorption and extinction coefficients, indirect and direct optical band gaps, Urbach energy as well as Fermi energy level of samples were estimated via their absorption spectra. Then, it was tried to make a relationship between the variation of mentioned parameters and structural chemistry of different doped samples. Results of the investigation illustrated that even a little change in the microstructure of glassy samples has an effect on optical parameters and accordingly it could be sensible. Furthermore, it was revealed that Fe3+ ions have the role of network forming in the structure of glass by increasing the formation of bridging oxygens (BOs) in the matrix.
桥氧形成对Fe3+掺杂Li2O-Al2O3-SiO2-TiO2玻璃光学性能的影响
本研究利用紫外可见光谱分析了Fe3+掺杂Li2O-Al2O3-SiO2-TiO2 (LAST)玻璃的结构化学性质。通过吸收光谱估计样品的吸收消光系数、间接带隙和直接带隙、乌尔巴赫能和费米能级等光学参数。然后,试图建立上述参数的变化与不同掺杂样品的结构化学之间的关系。研究结果表明,即使玻璃样的微观结构发生很小的变化,也会对光学参数产生明显的影响。此外,还揭示了Fe3+离子通过增加基体中桥接氧(BOs)的形成,在玻璃结构中具有网络形成的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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