Effect of Er2O3 incorporation on thermal stability and optical properties of Bi2O3-PbO-B2O3 glass | ||||
| International Journal of Theoretical and Applied Research | ||||
| Volume 3, Issue 2, December 2024, Page 455-462 PDF (719.28 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ijtar.2024.331996.1088 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Amany Abd Elmaboud Omar  ; Nada AlRefaey
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| Al Azhar University - Faculty of Science - Physics Department | ||||
| Abstract | ||||
| The base glass (25 Bi2O3–25PbO-50B2O3) was doped with x = 0.5, 1, 1.5 and 2 moles % Er2O3 respectively. Glasses were prepared using the conventional melt-quenching method. Characterization was conducted using X-ray diffraction (XRD), glass density (GD), molar volume (Vm), differential scanning calorimetry (DSC), and UV-Vis spectroscopy. The XRD revealed the amorphous nature of the glass network , regardless of the Er2O3 content. The GD values exhibited non-monotonic behavior with increasing Er2O3 content, while the Vm showed a gradual increase. Bonding characteristics of the glasses under study have been calculated to clarify the effect of Er2O3 addition on the atomic glass structure. The DSC analysis showed a considerable increase in the Tg value for lower Er2O3 content followed by a sharp decrease. This may reflect the instability of the BO/NBO ratio in the glass matrix. In general, doping was found to increase the thermal stability of the glass. The measured optical properties exhibit a non-linear trend; the incorporation of 1.5 mole% of Er2O3 resulted in anomalous behaviors as a huge extension of the band tail to inside the forbidden gap occurred. On the other hand, the absorption characteristics revealed that glasses with 0.5 and 2% mole of Er2O3 displayed two localized band states inside the energy gap. These findings highlight the potential of Er2O3-doped Bi2O3-PbO-B2O3 glasses for advanced photonic applications. | ||||
| Keywords | ||||
| Er2O3 - doped oxide glass; X-ray diffraction; optical band gap; photonic materials; Differential scanning calorimetry | ||||
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