Year: 2018
Type: conference-paper
Abstract: Glasses with composition 25Li 2 O-15BaO-(60-x) B 2 O 3 : x CuO (where x=0, 0.2, 0.4, 0.6, 0.8 and 1 mol %) were prepared using the conventional melt quench technique. The optical absorption spectra of studied glass samples show only one absorption band which is attributed to the 2B 1g →2B 2g characteristic transition of Cu 2+ ions in the distorted octahedral sites. The cut-off wavelength (λ c ), optical band gap (E opt ) and Urbach energy (ΔE) were determined. The FTIR studies show different stretching and bending vibrations of alkaline earth lithium borate glasses. The relative variations in the intensities of BO 3 and BO 4 units in IR spectra with the concentration of CuO indicate that the copper ions mostly occupy modifying positions in the glass network when the concentration of CuO ≤ 0.8mol%.
Authors: Ashok Bhogi, R. Vijaya Kumar, P. Kistaiah
Institutions: University of Hyderabad, Osmania University
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2898202136