Influence of iron ions on the structural properties of Zn-borosilicate glasses

The effects of iron on the structural properties of Zn-borosilicate glasses have been studied using X-ray diffraction, IR spectroscopy and⁵⁷Fe Mössbauer spectroscopy. Zn-borosilicate glasses were doped with α?Fe₂O₃. In the systems Na₂O?ZnO?B₂O₃?SiO₂?Fe₂O₃ the presence of only one crystalline phase, ZnFe₂O₄, was detected. X-ray diffraction showed that crystallization is more pronounced in the systems ZnO?B₂O₃?SiO₂?Fe₂O₃. In these systems the presence of different crystalline phases, such as ZnO, γ?Fe₂O₃, Fe₃O₄, ZnFe₂O₄ and Fe₃BO₅, was detected. The crystallization of α?Zn₂SiO₄ in the system ZnO?B₂O₃?SiO₂ was confirmed by X-ray diffraction and IR spectroscopy. The valence state and coordination of iron in Zn-borosilicate glasses were determined by⁵⁷Fe Mössbauer spectroscopy.