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Santiago de Querétaro, Mexico

Lopez-Calzada G.,Autonomous University of Puebla | Zayas Ma.E.,University of Sonora | Ceron-Rivera M.,Institute Ciencias | Percino J.,Institute Ciencias | And 7 more authors.
Journal of Non-Crystalline Solids | Year: 2010

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 V{double bond, long}O bond appeared. © 2009 Elsevier B.V. All rights reserved.

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