Optical and radiation shielding features of NiO-CdO-BaO borosilicate glasses

Abstract

We report on the optical and radiation shielding features of NiO-CdO-BaO borosilicate glasses in the UV-Vis-NIR range. The presence of Ni2+ cations in the octahedral site is emphasized by the absorption band at about 434-462 nm originating from 3A2g(F) → 3T1g(P) electronic transitions in the visible range. Also, this absorption band makes the present glass samples good candidates for optical filter applications within the visible range. Moreover, the most remarkable absorption band at about 966–986 nm due to Ni2+ cations in the tetrahedral site; 3T1(F) → 3A2(F) electronic transitions. The noticed increase in this absorption band reflects the increased heat-absorbing ability of the present glasses with further NiO doping. This result makes the present glass samples possible for solar thermal collectors. The reduction of the optical band gap (Eg) values from 3.16 to 2.95 eV can be explained by the creation of nonbridging oxygens produced by the existence of Ni2+ cations in the octahedral site. The electronic polarizability (α0 -2) and optical basicity (˄ th ) values showed a slight increase with a further increase in the NiO: CdO ratio. The values of metallization criterion (M) decreased from 0.397 to 0.384 with more concentrations of NiO which agrees with the obtained data for E g. The third-order nonlinear susceptibility (χ(3)) and nonlinear refractive index (n 2) values introduced an increment behavior with more concentrations of NiO. This behavior can be justified by the decreasing behavior of E g. On the other hand, our glass samples are good attenuators against the low energy radiation, since the linear attenuation coefficient is high (from 0.449 to 0.442 cm-1) at 0.284 MeV.

Influence of ZnO on the structural, optical, ligand field and antibacterial characteristics of sodium borosilicate glasses containing minor Cr2O3 additions

“…The average value for any investigated parameter (x av ; X could be the density, molar volume, optical band gap, etc), and the estimated errors were obtained from the following formula [9] ( )…”

“…One of the glassy-formed systems is borosilicate glass. Borosilicate glass is considered an important material for commercial and scientific applications [9,10], including display screens, pharmaceutical vessels, glasses fiber, bioactive glass, optical apparatuses, radioactive wastes encapsulation, etc The characteristics of borosilicate glasses strongly depend on the presence of boron oxide B 2 O 3 . B 2 O 3 is deemed as a significant glass former according to distinguishable merits like formation feasibility, reduced cost, decreased melting point, and decent transparency along with elevated thermal stability [11].…”

Influence NiO on the structure, elastic properties and buildup factor of BaO-CdO-borosilicate glasses

“…Basically, the dichromatic centers, [NiO 4 ] and [NiO 6 ], produce Sundry colors for glass systems incorporating Ni 2+ form. In fact, the ratio of these bicolor centers depends on diverse factors, like the size and strength of ions, the network modifiers' mobility, and the presence of former ions within the glass's structure [13]. Adding Ni cations to glass systems may ameliorate optical communication technology and make the glass appropriate for Sundry applications, like solar cells and lasers [13].…”

“…The main radiation shielding parameter is the mass attenuation coefficient (μ/ρ) that reported focally in the previous literature [13][14][15][16]. Importantly, based on the (μ/ρ) values, other significant parameters can be deduced; for example, build up factors; (exposure, EBF), and (energy absorption, EABF).…”

“…The radiation shielding parameters of CdO doped glasses were reported in [14,16,17]. Also, various studies investigated the impact of NiO on the various properties of glasses, for example, the structural and optical properties [18,19] and the radiation shielding parameters [13,20]. In details, Abul-Magd et al [18] studied the effect of NiO additives on the structural and optical properties of nickel-doped sodium zinc borate (NZB) glasses.…”