Crystallization behavior of aluminum fluorosilicate glass systems doped with Niobium oxide. | ||||
| Mansoura Journal of Chemistry | ||||
| Volume 68, Issue 2, May 2025, Page 28-36 PDF (1.01 MB) | ||||
| Document Type: Research Article | ||||
| DOI: 10.21608/mjcc.2025.387333.1011 | ||||
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| Authors | ||||
A.M. Elsherbeny  1; A.M. Abelghany2; S.M. Ghorab3; R.M. Shalaby4
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| 1Metal Physics Laboratory, Physics department, Faculty of science, Mansoura University, Mansoura, Egypt. | ||||
| 2Spectroscopy Department, Physics Research Institute, National Research Centre, 33 Elbehouth St., Dokki, 123111, Giza, Egypt | ||||
| 3Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt | ||||
| 4Metal Physics Laboratory, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt | ||||
| Abstract | ||||
| The present study investigates the crystallization behavior of aluminum fluorosilicate glass systems doped with Nb₂O₅ (0, 5, and 10 mol%) within the composition 45SiO₂–15Al₂O₃–10CaF₂–15Na₂O–5NaF–(10−x)SrO–xNb₂O₅. Through XRD, FTIR, SEM, and physical parameter analyses, the role of Nb₂O₅ as a nucleating agent and network modifier was elucidated. Results reveal that increasing Nb₂O₅ content promotes crystallization, forming niobium-rich phases (e.g., NaNbO₃) while reducing amorphous fractions. FTIR deconvolution highlights Nb⁵⁺ incorporation into the glass network, enhancing polymerization. Theoretical density exceeded experimental values due to microvoids and Nb-induced structural distortions. These findings underscore Nb₂O₅'s dual functionality—enhancing network stability while promoting crystallization—enabling the design of advanced glass-ceramics with optimized mechanical, optical, and thermal properties for targeted applications. The study provides a foundation for further exploration of Nb-doped fluorosilicate systems in materials science. The study demonstrates Nb₂O₅'s dual role in stabilizing the network and driving crystallization, offering insights for designing tailored glass-ceramics with controlled microstructures for optical and engineering applications. | ||||
| Keywords | ||||
| Fluorosilicate glass; crystallization; glass-ceramic; Nb2O5 | ||||
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