Synthesis, Mechanical and Optical Features of Dy2O3 Doped Lead Alkali Borosilicate Glasses
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Characterizations of the prepared pseudo penta-glass system 60 PbO – (40-x) SiO2 – x (0.1 Li2O – 0.86 B2O3 – 0.04 Dy2O3) with 0 ≤ x ≤ 30 mol% were performed in terms of the ultrasonic and spectroscopic techniques. The increase of (0.1 Li2O – 0.86 B2O3 – 0.04 Dy2O3) content causes borate structural variations such as the transformation of [BO3] to [BO4] structural units and enhancement of the compactness of the glasses. These physical parameters play an important role in modifying the mechanical and the optical properties of the lead silicate glasses. The improvement of the mechanical properties is indicated from the increment of the density, the ultrasonic velocities, the elastic moduli (experimentally determined and theoretically computed) and the glass transition temperature. The borate structural variations along with the presence of Dy2O3 decrease both the UV transmission and the optical energy gap, increase the refractive index and created several transitions at different wavelengths.
KeywordsDy2O3 Borosilicate glasses Elastic moduli DTA – UV-Vis spectroscopy
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The author (Prof. Atif Mossad Ali) extend his appreciation to the Deanship of Scientific Research at King Khalid University for funding this work through research groups program under grant number R.G.P. 2/8/38.
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