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<p>Sodium zinc boro-phosphate glasses were prepared via conventional melt-quenching technique, encompassing compositions 40Na<sub>2</sub>O·20ZnO·xP<sub>2</sub>O<sub>5</sub>·(40−]x)B<sub>2</sub>O<sub>3</sub> where x varies from 2, 4, 6, 8 and 10&#xa0;mol percent. By maintaining a constant modifier-to-glass former ratio, the study focuses on the impact of replacing borate for phosphate on the physical, structural, and optical properties of synthesized glass system. Density, molar volume, and other physical parameters as a function of P<sub>2</sub>O<sub>5</sub> content have been estimated. Glass transition Temperature, T<sub>g</sub> estimated using Differential Scanning Calorimetry (DSC) ranges from 684 to 757&#xa0;K. Spectroscopic analysis using FTIR and Raman spectroscopy reveals a highly crosslinked structure at 6&#xa0;mol percent of P<sub>2</sub>O<sub>5</sub> through formation of B–O–P linkages and depolymerization of glass network with further increase in P<sub>2</sub>O<sub>5</sub> content. UV-visible spectroscopy shows optical band gap (E<sub>g</sub>), decreases (3.013–2.235&#xa0;eV) upto 6&#xa0;mol percent of P<sub>2</sub>O<sub>5</sub> content and then further increases (3.172–3.208&#xa0;eV).Metallization criterion values (0.388–0.400)indicate suitability of prepared glasses for nonlinear optical applications. Additionally optical parameters provide insights into how borate and phosphate influence the glass network and its properties.</p>

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Unraveling the role of structural cross-linking on optical and physical properties of sodium zinc boro-phosphate glasses

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Jyoti Ahlawat,
  • Anurag Sangwan,
  • Anil Ohlan,
  • Sajjan Dahiya,
  • Rajesh Punia,
  • A. S. Maan

摘要

Sodium zinc boro-phosphate glasses were prepared via conventional melt-quenching technique, encompassing compositions 40Na2O·20ZnO·xP2O5·(40−]x)B2O3 where x varies from 2, 4, 6, 8 and 10 mol percent. By maintaining a constant modifier-to-glass former ratio, the study focuses on the impact of replacing borate for phosphate on the physical, structural, and optical properties of synthesized glass system. Density, molar volume, and other physical parameters as a function of P2O5 content have been estimated. Glass transition Temperature, Tg estimated using Differential Scanning Calorimetry (DSC) ranges from 684 to 757 K. Spectroscopic analysis using FTIR and Raman spectroscopy reveals a highly crosslinked structure at 6 mol percent of P2O5 through formation of B–O–P linkages and depolymerization of glass network with further increase in P2O5 content. UV-visible spectroscopy shows optical band gap (Eg), decreases (3.013–2.235 eV) upto 6 mol percent of P2O5 content and then further increases (3.172–3.208 eV).Metallization criterion values (0.388–0.400)indicate suitability of prepared glasses for nonlinear optical applications. Additionally optical parameters provide insights into how borate and phosphate influence the glass network and its properties.