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Abstract <p>Bismuth-modified barium borosilicate glasses with composition 30BaO–(50–m)B₂O₃–20SiO₂–mBi₂O₃ (m = 0–20&#xa0;mol%) were prepared to clarify the role of Bi₂O₃ in tailoring structure, thermal behavior and γ-ray shielding efficiency. X-ray diffraction confirmed fully amorphous samples over the entire substitution range, while FTIR spectroscopy showed progressive depolymerization of the borosilicate network with increasing Bi₂O₃. Density and molar volume increased from 3.50 to 5.54&#xa0;g·cm⁻<sup>3</sup> and 26.49 to 31.05 cm<sup>3</sup>·mol⁻<sup>1</sup>, accompanied by decreasing DTA and dilatometric glass-transition and softening temperatures and increasing linear thermal expansion. Photon-interaction parameters were calculated using Phy-X/PSD in the 0.347–2.506&#xa0;MeV range. Linear attenuation coefficients and effective atomic numbers increased significantly with Bi₂O₃ content over the entire energy range, while tenth-value layer thicknesses at ⁶⁰Co energies decreased by ~ 40% between Bi-free and 20&#xa0;mol% Bi₂O₃ glasses. The bismuth-modified barium borosilicate glasses therefore offer tunable properties within the investigated substitution series and promising lead-free candidates for advanced γ-ray-protective shielding components.</p> Graphical Abstract <p></p>

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Bismuth-modified barium borosilicate glasses: Structure, thermo-physical properties and gamma-ray shielding performance

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Yurii Hordieiev,
  • Aleksandr Zaichuk

摘要

Abstract

Bismuth-modified barium borosilicate glasses with composition 30BaO–(50–m)B₂O₃–20SiO₂–mBi₂O₃ (m = 0–20 mol%) were prepared to clarify the role of Bi₂O₃ in tailoring structure, thermal behavior and γ-ray shielding efficiency. X-ray diffraction confirmed fully amorphous samples over the entire substitution range, while FTIR spectroscopy showed progressive depolymerization of the borosilicate network with increasing Bi₂O₃. Density and molar volume increased from 3.50 to 5.54 g·cm⁻3 and 26.49 to 31.05 cm3·mol⁻1, accompanied by decreasing DTA and dilatometric glass-transition and softening temperatures and increasing linear thermal expansion. Photon-interaction parameters were calculated using Phy-X/PSD in the 0.347–2.506 MeV range. Linear attenuation coefficients and effective atomic numbers increased significantly with Bi₂O₃ content over the entire energy range, while tenth-value layer thicknesses at ⁶⁰Co energies decreased by ~ 40% between Bi-free and 20 mol% Bi₂O₃ glasses. The bismuth-modified barium borosilicate glasses therefore offer tunable properties within the investigated substitution series and promising lead-free candidates for advanced γ-ray-protective shielding components.

Graphical Abstract