Properties of Vanadium (VO2+) doped K2O - CdO - B2O3 - SiO2 (KCdBSi) Glasses

Abstract

Glasses of the 20K2O - 5CdO - 60B2O3 -15SiO2 and (20-x) K2O - 5CdO - 60B2O3 - 15SiO2 - xV2O5 (where x = 0.1 to 0.5 mol %) KCBSi systems are prepared by melt quenching technique. Optical and structural properties of undoped glass, and glasses doped with VO2+ ions are examined. Their structural properties are determined with XRD, Fourier Transform Infrared (FTIR) and Electron Spin Resonance spectra (ESR) and Optical absorption spectra. The ESR spectra of all the glass samples exhibit resonance signals characteristic of VO2+ ions. The values of spin-Hamiltonian parameters indicated that the VO2+ ion in KCdBSi glasses are present in octahedral sites with tetrahedral compression and belong to C4v symmetry. Spin-Hamiltonian parameters ‘g’ and ‘A’ are calculated from their Ultra Violet edges. IR spectra of these glasses are analysed in order of each component to the local structure. The physical parameters are also evaluated.