Redox behavior and local structure of antimony in soda-lime silicate glass
Abstract
Antimony is widely used in industrial glasses as a fining agent and optical modifier, yet its redox behavior and structural role remain incompletely understood. This study examines the effects of antimony concentration, Sb precursors, and melting temperature on the properties and Sb redox state of soda-lime silicate glasses. analyses reveal a Sb2O3 incorporation up to ~8–10 mol% at 1350 ◦C. XANES measurements show that Sb3+ species are dominant, although lower Sb3+/Sbtotal ratios are observed when Sb2O5 is used as precursor with 2h- melting. The reduction of Sb5+to Sb3+becomes favorable above ~1175–1200 ◦C and strongly favors Sb3+at typical melting temperatures (1350–1500 ◦C), conditions that also provide sufficiently low melt viscosities for effective fining. Increasing Sb content induces a red shift of the UV absorption edge and enhanced yellow coloration dominated by Sb3+ electronic transitions. Variations in density, molar volume, compactness, glass transition temperature and viscosity with Sb2O3 content, combined with structural insights from Raman spectroscopy, reveal the dual role of Sb in the glass network.
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BibTeX
@article{cormier2026redox,
title = {{Redox behavior and local structure of antimony in soda-lime silicate glass}},
author = {Laurent Cormier and Léa Gardie and Daniel Neuville},
journal = {Journal of Non-Crystalline Solids},
year = {2026},
month = aug,
doi = {10.1016/j.jnoncrysol.2026.124304},
url = {https://hal.science/hal-05763312v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Redox behavior and local structure of antimony in soda-lime silicate glass
AU - Laurent Cormier
AU - Léa Gardie
AU - Daniel Neuville
PY - 2026
DA - 2026/08/06
JO - Journal of Non-Crystalline Solids
DO - 10.1016/j.jnoncrysol.2026.124304
UR - https://hal.science/hal-05763312v1
AB - Antimony is widely used in industrial glasses as a fining agent and optical modifier, yet its redox behavior and structural role remain incompletely understood. This study examines the effects of antimony concentration, Sb precursors, and melting temperature on the properties and Sb redox state of soda-lime silicate glasses. analyses reveal a Sb2O3 incorporation up to ~8–10 mol% at 1350 ◦C. XANES measurements show that Sb3+ species are dominant, although lower Sb3+/Sbtotal ratios are observed when Sb2O5 is used as precursor with 2h- melting. The reduction of Sb5+to Sb3+becomes favorable above ~1175–1200 ◦C and strongly favors Sb3+at typical melting temperatures (1350–1500 ◦C), conditions that also provide sufficiently low melt viscosities for effective fining. Increasing Sb content induces a red shift of the UV absorption edge and enhanced yellow coloration dominated by Sb3+ electronic transitions. Variations in density, molar volume, compactness, glass transition temperature and viscosity with Sb2O3 content, combined with structural insights from Raman spectroscopy, reveal the dual role of Sb in the glass network.
SN - 0022-3093
ER -