Abstract
The effects of iron on the structural properties of Zn-borosilicate glasses have been studied using X-ray diffraction, IR spectroscopy and57Fe Mossbauer 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 Mossbauer spectroscopy.
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