| Structural and Optical Properties of Alumino Lead Borate
Glasses Containing Copper Oxide |
Pavan Kumar Chincholi Seshadri,a, b Siddalingeshwara Bukkambudhi Parameshwarappa,a, c
Vijeth Rajshekar Shettyd and Nanja Reddy Sivasankara Reddya, *
Pages : 221-226
DOI :10.1080/0371750X.2024.2413989 |
| Abstract |
| The alumino lead borate glasses with small amounts of copper oxide were synthesized
by melting and quenching according to the relation 50B2O3-30PbO-(20–x)Al2O3-xCuO
with x = 0, 0.10, 0.25, 0.50, 0.75 and 1.00 mol%. The powder XRDs had no sharp peaks
which show that the samples are amorphous. Density of the glasses increased as the
content of the CuO increased. FTIR spectroscopic studies reveal the presence of
BO3, BO4
–, PbO4, AlO4, pentaborate [B5O8
–], diborate [B4O7
2–] and dipentaborate B5Ø11
2–
structural units. The UV-visible absorption studies showed that the refractive index,
indirect energy gap, oxide ion polarizability and optical basicity had composition
dependence which were related to the glass structure. As the CuO concentration
increased, the refractive index decreased, indirect energy gap increased, oxide ion
polarizability decreased and optical basicity decreased. Optical band gap increased
with increasing CuO content as the band gap for bridging oxygens is higher than that
for non-bridging oxygens.
[Keywords: Diborate, Metaborate chains, Pentaborate, Oxide ion polarizability, FTIR
spectroscopy] |
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