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.
Highlights
IntroductionProgress in materials science will be limited due to the lack of data available on the microstructure of materials
Nowadays there is a diversity of techniques which is being utilized for prediction of crystalline structures such as transmission electron microscopy (TEM), X-ray diffractometry (XRD) and so on [1–4]
It is attempted to physically analyze the UV-Vis absorption spectrum of LAST glass doped by various amount of Fe2O3, make a correlation between the physical parameters and structural chemistry of this matter
Summary
Progress in materials science will be limited due to the lack of data available on the microstructure of materials. Extraction of data is still in a serious doubt for the amorphous structures due to the short-range order of crystals distributed stochastically in the bulk of samples. Heavy doped materials are utilized for production of the small, high power optical devices [9,10]. Glassy materials are the interested materials for production of small, high power devices due to their high solubility of dopants in amorphous matrix. According to the feathers of LAS glasses like high transmissibility, near zero thermal expansion and non-linear optical properties, they are utilized in advanced applications. It is attempted to physically analyze the UV-Vis absorption spectrum of LAST glass doped by various amount of Fe2O3, make a correlation between the physical parameters and structural chemistry of this matter
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