Abstract:
The nuclear waste host Zinc-Iron-Phosphate glass have been prepared with molar
composition 40 P2O5 – 10 B2O3 – 20Fe2O3 – (30-x) ZnO – xBaO2, where we vary x
as 0, 5, 10 and 20 by melt quench method. FTIR results shows that the chemical
durability of HLW glasses increase due to the presence of Fe2O3 content because P O-P bond is being replaced by more chemically resistant Fe-O-P bonds. The
dimension of relative area for one group is proportional to its peak intensity in
Raman spectra. Generally, the loading of HLW induces the increase of Q0 groups
and the decrease of Q1
and Q2 groups. The variations of Raman Spectra are
consistent with the results of FTIR analysis. The optical absorption spectra of these
glasses were measured at room temperature in the wavelength range between 200
and 800 nm. The optical absorption indicates that the electronic transition is indirect.
From the absorption spectra, the optical energy band gaps for all the glass samples
were calculated from their ultraviolet edges. The values of Eenrgy is found to
increase from 3.36 to 3.83 eV as ZnO content is increases. Variation in these optical
parameters is discussed and correlated with the structural changes within the glassy
matrix.
