Author(s): P. Naresh, R Vijay, P. Ramesh Babu, B. Rupa Venkateswara Rao
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 06 , June - 2017
In this work, glass systems of the composition (10-x) ZnO–30ZnF2–60B2O3: xV2O5 where (x = 0.2, 0.4, 0.6, 0.8, 1.0 mol %) have been prepared by the conventional melt quenching technique. Optical absorption, IR and ESR of these glass samples has been investigated. Optical absorption spectra exhibits two broad absorption bands at about 640 and 1020 nm due to 2B2→2B1 and 2B2→2E transitions of VO2+ ions. With increase in the concentration of V2O5, the intensity of these peaks is observed to increase with a red shift. The IR spectral studies indicated that the glass samples contain various structural units with the linkages of the type B–O–B, V–O–V; the increasing content of V2O5 in the glass samples seemed to have weakened such linkages. The ESR results indicate that the ratio g g || is observed to decrease gradually with concentration of V2O5. Finally, the analysis of the results of OA, ESR spectra of the studied glass has indicated that a considerable proportion of vanadium ions do exist in V4+ state in addition to V5+ state with an increase in the concentration of V2O5.
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