Abstract
Two series of vanadium phosphate glasses (1 – x) Na2O – (1 – y) P2O5 – (x + y) V2O5 and Na2O – (1 – x) V2O5 – xFe2O3 – P2O5 were prepared. Thermal stability and glass structure were studied using differential thermal analysis (DTA), X-ray diffraction (XRD), infrared (IR) and Raman spectroscopy. The glass stability against the crystallization is described using parameters based on the characteristic temperatures. The role of addition vanadium or iron oxides in the glass network was discussed from IR and Raman spectroscopy data. The changes observed in the IR and Raman spectra for both glasses show that vanadium acts as a network former, while, the iron as a network modifier.
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