DEVELOPMENT OF COLORED GLASS FROM DOPED WITH CuO AND Cr2O3 FOR USE AS ARTIFICIAL GEMSTONES AND JEWELRY
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DOI:
https://doi.org/10.55766/sujst11214Keywords:
Waste glasses, Artificial gems, OpticalAbstract
This study focuses on investigation and development of low temperature glasses for application as synthetic gemstones and lead-free glass-based jewelry. The glass systems were primarily composed of waste glass (WG) and doped with copper oxide (CuO) and chromium oxide (Cr2O3). The glass systems were prepared using the melt quenching technique in the compositional formula (100-x)WG: xCuO/Cr2O3, where x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5 mol%. The results found that the increasing of CuO and Cr2O3 content led to increase in both density and refractive index of glass systems. The analysis absorption spectra of CuO doped glass systems at 300-2000 nm, it found absorption peak at 800 nm (2E → 2T2) due to Cu2+ ion in octahedral coordination with a strong tetragonal distortion. In case of Cr2O3 doped glass systems at absorption spectra 400-1000 nm, it found absorption peaks around 420, 690 and 635 nm, as corresponding to the 4A2 → 4T1(F), 4A2g(F) → 4T2g(F) and 4A2g(F) → 2T1g(F) transitions of Cr3+ ions, respectively. Colorimetric analysis based on the CIE L*a*b revealed that the CuO and Cr2O3 doped glass systems exhibited blue and green, respectively. These results demonstrate a sustainable way to recycle waste glass into value-added colored materials for eco-friendly jewelry applications.
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