Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 572, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2021.121104
Keywords
Natural obsidian glass (NOG); Erbium oxide (Er2O3); Mechanical properties; Raman spectroscopy; Photoluminescence spectra
Funding
- HuBAK (The Sci-entific Research Projects Commission of Harran University, Sanliurfa, TURKEY) [14085, K18188, 15026]
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In this study, natural volcanic Obsidian glass doped with different concentrations of Er2O3 was investigated for its physical, structural, and mechanical properties. The addition of Er2O3 increased the luminescent and fracture toughness of the glasses, indicating improvements in their optical and mechanical characteristics.
In this study, natural volcanic Obsidian glass doped with Er2O3 (0.5, 1, 3, 5, and 10 wt.%) were prepared by melt quenching method, and the physical, structural, and mechanical properties were investigated. Micro-Vickers indentation test was used to determine the mechanical properties. The X-ray diffraction (XRD) analysis was conducted for the structure of glasses. The spectroscopy analyses of the glasses were investigated by Fourier Transform Infrared (FT-IR) spectra. The luminescence properties of samples were investigated. Raman spectroscopy was performed to observe the effect of Erbium concentration on sintered and non-sintered Er2O3 doped obsidian glasses. The excitation and emission bands increased with the addition of Er2O3 and the shift in the red region was observed. The amorphous phase of synthesized natural obsidian glasses (NOG) was confirmed from XRD patterns and Fracture toughness (K-IC) enhanced from 1.65 to 1.76 MPa.m(1/2) with 1 wt.% Er2O3 addition.
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