Investigations on Structural and Optical Properties of Various Modifier Oxides (MO = ZnO, CdO, BaO, and PbO) Containing Bismuth Borate Lithium Glasses

Abstract

Bismuth based quaternary glasses with compositions BiBLM: 50Bi2O3–20B2O3–15Li2O–15MO (where MO = ZnO, CdO, BaO, and PbO) were processed by conventional melt quenching. The effectiveness of various modifier oxides on the optical and structural properties of the developed glasses was studied systematically by XRD, DSC, FTIR, Raman, and optical absorption (OA) measurements. The synthesized glass specimens were characterized by XRD and the patterns demonstrated an amorphous nature. The physical characteristics such as molar mass, density, and OPD values were found to increase with an increase in the molar mass of the modifier oxides, while there was a decrement in oxygen molar volume, thus resulting in decrement of complete molar volume of the prepared glasses. From DSC analysis, incorrigible reduction and enhancement of Tg and thermal stability among various modifier oxides in the glass network was noticed. Optical absorption data for glass specimens have confirmed the decrease in both direct and indirect optical band gap values among various modifier oxides incorporation. These investigations support the obtained Urbach energy (UE) and metallization criteria of synthesized glasses. The ionic characteristic for the glass specimens were confirmed by the values of electronic polarizability and electronegativity. The Raman and FT-IR spectra of the glass specimens displayed the existence of BiO3, BiO6, ZnO4, CdO4, BaO4, BO3, PbO4, and BO4 structural units within the glass matrix. These structural results can support the applications of as-developed glasses in the area of photonics.

Physical, Optical, and Spectroscopic Characteristics of Mixed Alkali Tetraborate Glasses RO–ZnO–Li2B4O7-K2B4O7: Impact of Alkaline Earth Oxides (R = Mg, Ca)

“…Density values are given in Table II. Molar volume (V m ) is calculated using density values by the formula, 20…”

“…The reported values of E opt and ΔE of MZLK and CZLK glass systems are comparable with similar glass systems mentioned by other researchers. 20,21,26,27 The errors in the calculation of E opt and ΔE respectively about ±0.05ev and ±0.005 eV. It can be seen from The disorder in amorphous materials is distinct from crystalline counter parts.…”

“…This type of relation between density and molar volume have been observed in many alkalialkaline Earth borate glasses, alkali silicate glasses etc. [20][21][22] The physical parameters density and molar volume provide valuable informatiom on various structural units present in the glass network as these parameters are intimately related to the arrangement of basic structural units in the glass network. The densities of MZLK glass system are lower than that of CZLK glasses, while molar volume values of MZLK glass system are slightly greater than that of CZLK glasses.…”

Doping impacts of La2O3 on physical, structural, optical and radiation shielding properties of (30-x)BaCO3–30TiO2–40SiO2-xLa2O3 (0 ≤ x ≤ 6) glasses for optoelectronic applications

“…as 0.557, 0.561, 0.564, and 0.566 respectively. The probable reason for decrement in R L of the glasses might be due to creation of NBOs in the present glassy network [73]. However, the capability to attract electrons to itself inside a molecule describes the electronegativity (χ).…”

“…However, the capability to attract electrons to itself inside a molecule describes the electronegativity (χ). Pauling suggested that when two or more than two atoms having different values of χ then form an alloy or a compound, then a higher χ element attracts an e-pair towards itself more and acts like an anion while other elements act like a cation [72,73]. The values of χ were obtained in decreasing behaviour 1.054, 1.035, 1.024, and 1.013 respectively and this behaviour was due to the χ value of all components available in the glassy matrix.…”