DC Conductivity of Heavy Metal Oxide (Bi2O3) Boro-Tellurite Glasses: Effect of Eu2O3

Abstract

A novel investigation on structural and DC conductivity of Eu2O3 activated heavy metal oxide boro-tellurite (BBTE) glasses were analyzed. The boro-bismuth-tellurite glass samples doped with europium trioxide were fabricated by the conventional melt quenching method. The microstructural and structural studies of the glasses have been done by scanning electron microscope (SEM) and X-ray diffraction (XRD), respectively. The DC conductivity of the BBTE samples has been studied at the frequency range 40Hz-6MHz and in the temperature range 303-453K. The XRD and SEM, confirm the non-crystalline and homogeneous properties of prepared glasses. The DC conductivity of glasses obeys Arrhenius behavior and DC conductivity decreases with increasing Eu2O3 concentration. A very less amount of DC conductivity was noticed in glasses with various temperatures and it is due to less availability of oxide ions.

Investigations of structural modifications, physical and optical properties of lead boro-tellurite glasses doped with europium trioxide for possible optical switching applications

“…The significant variations in the density are attributed to i) larger changes in average molecular weight in oxide ions of glass owing to the higher molecular weight of Eu2O3 than B2O3, ii) considerable changes in molar mass of europium trioxide, iii) addition of lead ions with Eu 3+ ions holds greater atomic mass. Additionally, the generation of nonbridging oxygen (NBO) in LABT glasses also impacts modifications in density, and similar work is also reported in the literature [1,9,11,20,[38][39][40][41]. It is noticed that the density of glasses has been increased up to LABT2 glasses with rise in concentration of Eu2O3 and decreased at LABT3 and LABT4 glasses.…”

“…It has been reported that direct and indirect bandgap data well fit an Equation (5) proposed by Davis and Mott. [1,9,18,20,21,[40][41][42][43][44][45][46].…”

“…It has been observed that in glasses with a high refractive index, the blue-shifted absorption edge (wavelength less than 400 nm) and high transmittance in visible wavelength can be attained concurrently [2]. The optical nonlinearity of high refractive index features of various oxide glasses containing Pb, Bi, Te, and Chalcogenide glasses was investigated [4][5][6][7][8][9][10][11]. The bandgap energy (Eg) of boro tellurite glasses with different concentrations of Eu2O3 plays a crucial role in determining their switching performance.…”

“…Furthermore, B2O3, TeO2, and PbO contents are likely to have a significantly high refractive index and strong optical nonlinearity. Electronic polarizability and optical basicity were used to examine the refractive index and related optical properties of the obtained glasses [2][3][4][7][8][9].…”