Impact of [Dy.sub.2][O.sub.3] Substitution on the Physical, Structural and Optical Properties of Lithium-Aluminium-Borate Glass System

In this study, a series of [Li.sub.2]O-[Al.sub.2][O.sub.3]-[B.sub.2][O.sub.3] glasses doped with various concentrations of [Dy.sub.2][O.sub.3] (where x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 mol%) were prepared by using a conventional melt-quenching technique. The structural, physical and optical properties of the glasses were examined by utilising a variety of techniques instance, X-ray diffraction (XRD), UV-Vis-NIR spectrometer, Fourier transform infrared (FTIR) and photoluminescence (PL). The XRD spectra demonstrate the amorphous phase of all glasses. Furthermore, the UV-vis-NIR spectrometers have registered optical absorption spectra a numbers of peaks which exist at 1703,1271,1095, 902, 841, 802, 669, 458, 393 and 352 nm congruous to the transitions from the ground of state ([sup.6][H.sub.15/2]) to different excited states, [mathematical expression not reproducible], respectively. The spectra of emission exhibit two strong emanation bands at 481 nm and 575 nm in the visible region, which correspond to the transitions [mathematical expression not reproducible]. All prepared glass samples doped with [Dy.sub.2][O.sub.3] show an increase in the emission intensity with an increase in the concentration of [Dy.sup.3+]. Based on the obtained results, the aforementioned glass samples may have possible applications, such as optical sensor and laser applications. Keywords: borate glass; [Dy.sub.2][O.sub.3]; UV-VIS-NIR; photoluminescence