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<p>This study investigates the structural and thermal properties of cerium-doped soda–lime glasses. A series of glasses with varying CeO<sub>2</sub> concentrations (0.6–15&#xa0;wt.%) were synthesized via the melt-quenching technique in alumina crucibles, yielding homogeneous, amorphous materials characterized by SEM, EDX, XRD, FTIR, Raman spectroscopy, and differential thermal analysis (DTA). Potentiometric titration confirmed the presence of tetravalent cerium (Ce<sup>4+</sup>) and&#xa0;trivalent cerium (Ce<sup>3+</sup>)&#xa0;as the dominant oxidation state. Structural studies revealed Ce-induced silicate network depolymerization, evidenced by shifts in Qⁿ unit distribution (Q<sup>4</sup> → Q<sup>3</sup>/Q<sup>2</sup>) in FTIR/Raman spectra and increasing O:Si ratios. Despite this depolymerization, the effective cationic field strength (ECFS) rose with both Ce<sup>3+</sup> and Ce<sup>4+</sup> incorporation, driven by their high bond strengths, counteracting network fragmentation. Consequently, the glass transition temperature (T<sub>g</sub>) increased monotonically with Ce<sup>4+</sup> content (611&#xa0;°C to 634&#xa0;°C), while thermal stability (S) decreased due to enhanced crystallization tendencies. Aluminum oxide diffusion from crucibles (1–3 at%) further complicated compositional trends, influencing ECFS and crystallization kinetics. Optical basicity (Λ≈0.58) remained invariant, underscoring its insensitivity to localized Ce<sup>4+</sup> structural changes. These findings highlight valuable insights into the structural role of cerium in soda–lime glasses and its potential for optimizing glass properties for advanced technological applications.</p>

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The role of CeO2 doping in soda–lime silicate glass: structural and thermal properties

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月27日

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  • Karolina Milewska,
  • Sharafat Ali,
  • Peter Sundberg,
  • Stefania Wolff,
  • Zaeem Ur Rehman,
  • Mohsin Ali Raza,
  • Muhammad Huzaifa Tariq,
  • Natalia Anna Wójcik

摘要

This study investigates the structural and thermal properties of cerium-doped soda–lime glasses. A series of glasses with varying CeO2 concentrations (0.6–15 wt.%) were synthesized via the melt-quenching technique in alumina crucibles, yielding homogeneous, amorphous materials characterized by SEM, EDX, XRD, FTIR, Raman spectroscopy, and differential thermal analysis (DTA). Potentiometric titration confirmed the presence of tetravalent cerium (Ce4+) and trivalent cerium (Ce3+) as the dominant oxidation state. Structural studies revealed Ce-induced silicate network depolymerization, evidenced by shifts in Qⁿ unit distribution (Q4 → Q3/Q2) in FTIR/Raman spectra and increasing O:Si ratios. Despite this depolymerization, the effective cationic field strength (ECFS) rose with both Ce3+ and Ce4+ incorporation, driven by their high bond strengths, counteracting network fragmentation. Consequently, the glass transition temperature (Tg) increased monotonically with Ce4+ content (611 °C to 634 °C), while thermal stability (S) decreased due to enhanced crystallization tendencies. Aluminum oxide diffusion from crucibles (1–3 at%) further complicated compositional trends, influencing ECFS and crystallization kinetics. Optical basicity (Λ≈0.58) remained invariant, underscoring its insensitivity to localized Ce4+ structural changes. These findings highlight valuable insights into the structural role of cerium in soda–lime glasses and its potential for optimizing glass properties for advanced technological applications.