Effect of Fe2O3 and CoO co-doped in soda lime silicate glasses

Abstract

In the present work, Fe/Co co-doped in soda lime silicate (SLS) glasses were prepared by using normal melt quenching technique. The physical and optical properties of Fe/Co co-doped in SLS glasses such as density, molar volume, refractive index and optical absorption were investigated. The density and refractive index of the samples increases with increasing concentration of CoO. The molar volume values were found to decrease due to the decreasing of number of non-bridging oxygens (NBOs), which will lead to the close packing of atoms. The optical absorption spectrum of Fe/Co co-doped in SLS glasses measured at room temperature in the wavelength region 200–1100 nm. The absorption peak occurred at 380 537 595and 650 nm. In the wavelength at 385 nm has been assigned to the 6A1g(S) → 4T1g(P) transitions of Fe3+. From the Tanabe–Sugano energy level diagram given for d5 configuration, the bands observed at 385 nm have been assigned to the 6A1g(S) → 4T1g(P) transitions. The observed band positions are characteristic of Fe3+ ions in the distorted octahedral environment. In the wavelength at 537 595 and 650 nm have been assigned to 4T1g(F) → 2T1g (H), 4A2(4F) → 4T1 (4P) and 2T2 → 2T transition of Co2+ ions of pure tetrahedral coordinated Co2+ ions in soda lime silicate glasses.