Spectroscopic study and morphology of vanadate glasses and wollastonite-2m | Estudio espectroscópico y morfología de vidrios de vanadato y wollastonita-2m

I.V. García-Amaya, F.A. Paz-Moreno, J. Alvarado-Rivera, M.C. Acosta-Enríquez, Ma.E. Zayas, R. Gámez-Corrales, M.B. Manzanares-Martínez, V.E. Álvarez-Montaño, R. Lozada

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Abstract

©Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales. Wollastonite from Encarnaci & #243;n Villa Ju & #225;rez deposit located in Hidalgo, Mexico was used as raw material to fabricate glass using V2O5as former oxide. Powder fusion at 1350 & #176;C was carried out for glass fabrication. The obtained glasses were of amber, gray and black color; the most transparent glasses are those with a composition of 60 to 65[%] wt. of V2O5and 40 to 35 [%] wt. of wollastonite. XRD patterns of the samples show the presence of wollastonite-2M and the VO2orthorhombic crystalline phase. FT-IR and Raman spectroscopies revealed the formation of metavanadates and pirovanadates groups. In addition, drop of phase separation caused by liquid-liquid immiscibility was observed by scanning electron microscopy imaging. XPS analysis was carried out to analyze vanadium oxidation state and bonding and non-bonding oxygen estimation. The curve fitting of the high resolution spectra of the V 2p3/2peak showed the presence of V4+and V5+vanadium oxidation states for all glasses.
Original languageAmerican English
JournalSuperficies y Vacio
Volume27
Issue number4
StatePublished - 2014

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