Physical, optical and structural studies of copper-doped lead oxychloro borate glasses

• Published in: Bulletin of materials science 2018-06, Vol.41 (3), p.79, Article 79
• Main Authors: Chandra Sekhar, K, Hameed, Abdul, Sathe, Vasant G, Chary, M Narasimha, Shareefuddin, MD
• Format: Article
• Language: English
• Subjects: Absorption spectra; Chemistry and Materials Science; Copper; Electron paramagnetic resonance; Energy; Engineering; Fourier transforms; Glass; Infrared spectroscopy; Lasers; Lead; Lead oxides; Materials Science; Molar volume; Optical properties; Physical properties; Radiation; Raman spectra
• ISSN: 0250-4707; 0973-7669
• DOI: 10.1007/s12034-018-1604-4

Bluish coloured glasses are obtained from the composition PbCl 2 –PbO–B 2 O 3 doped with Cu 2 + ions. Basic physical properties and spectroscopic studies (optical absorption, electron paramagnetic resonance, Fourier transform infrared and Raman spectroscopies) were carried out on these samples. The increase in PbCl 2 content resulted in the decrease in density and increase in molar volume. At optical frequencies, band gaps and Urbach energies were evaluated and their variation is explained. Spin-Hamiltonian parameters (SHP) obtained from the EPR spectra suggest that the ligand environment around Cu 2 + is tetragonally distorted octahedral sites and the orbital d x 2 - y 2 is the ground state. The characteristics broad bands in the optical absorption spectra are assigned to the 2 B 1 g → 2 B 2 g transition. The bonding coefficient values were evaluated using optical data and SHP. FTIR studies suggested that the glass structure is built up of BO 3 and BO 4 units. The presence of diborate, pyroborate, pentaborate groups, etc. in the glass network was confirmed from Raman spectra.