Optical characterization of novel matrix glasses based on a CdO:ZnO:V2O5 ternary system

Based on the adequate proportion in wt.% G1(70:10:20), G2(50:30:20), G3(60:20:20) and G4(70:20:10) of the oxides CdO:ZnO:V2O5, new types of glassy matrices were fabricated. By exploring within the Gibbs’s mixture triangle, 36 combinations of the CdO:ZnO:V2O5 reactants were examined and some of these combinations within this triangle yielded transparent and brilliant glasses. The X-ray patterns indicated that the glassy matrices were totally amorphous. In the IR spectra for the G1–G4 glasses, recorded at room temperature, two different bands were observed. One band was localized at 520 cm−1 and was assigned to the presence of unmelted ZnO, one of the starting materials. Another wide band in the interval of 1200–630 cm−1 was assigned to the presence of CdV2O6, Cd2V2O7, ZnV2O6 and Zn2V2O7 compounds. The optical absorption allowed the evaluation of an Eg in the region of 4.2–5.4 eV for this group of glasses, and by Raman spectroscopy, changes in vibrations of the VO bond appeared.