Effect of lanthanum oxide addition on physical, electrical and dielectric properties in lithium borosilicate glasses

Abstract

In the present study, lanthanum oxide doped lithium borosilicate glasses were synthesized using standard melt-quenching technique. The synthesized glass materials were characterized by XRD, FTIR, density calculation, Electrical and dielectric properties measurements. The amorphous nature of the studied glasses was established through XRD spectra. FTIR spectra were used to investigate the different functional groups. Improvements in density and molar volume values were reported as the La2O3 content increased, it can be attributed to higher molecular weight of La2O3. Numerous other physical parameters such as lanthanum ion concentration (N), inter-nuclear distance (ri), polaron radius (rp), and field intensity (F) were determined using density values and are discussed in detail here. Electrical conductivity and dielectric measurements were carried out by impedance spectroscopy. The dynamical processes taking place in the glass system was studied by introducing conductivity and composition scaling. The dielectric constant (ε’) and dielectric loss (Tan δ) with frequency at various temperatures are extensively explored. There is a fairly good correlation among the physical parameters, FTIR, electrical conductivity and dielectric properties for the glasses studied in the present work.