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The current research aims to develop an optically active, thermally luminescent, and radiation-shielding glass resources. For that, we have planned to develop a glasses of the chemical composition Ba(25-x)La15Si60Nix (where, 'x' = 0, 0.2, 0.4, 0.6, 0.8 & 1.0 mol%). There after the developed glasses are planned for structure, physical, mechanical, radiation shielding, optical and thermoluminescence characterization. The XRD & SEM studies reveal the glassy behavior. The EDS analysis signifies the chemical constitutes with atomic weight %. The physical properties such as density (~ 2.625 gm/cm3), molar volume (~ 48.48 cm3 mol−1) and refractive index (1.649) of glasses are evaluated. The DTA studies of glasses reveal the GTT (~ 429.5 °C) and thermal stabilities (1.593) evolutions are purely function of Ni2+ ions. Using ultrasonic velocities of the test glasses, the glasses' micro-hardness (~ 2.82 GPa) was evaluated. Radiation shielding properties such as RPE (~ 36.55%) and MAC (~ 16.556) reveal the shielding behavior is purely a function of Ni2+ ions. Using the optical absorption spectra, the bandgap (~ 1.21 eV) of the glasses evaluated. These values also purely function of Ni2+ ions. Using the photoluminescence spectra the luminescence analysis of glasses studied. The variations in values of emission cross section (~ 1.21 × 109, cm2) and Chromacity colour co-ordinates also suggesting emission range of glasses is purely function of Ni2+ ions. The TL properties are studied at 0 and 50 kGy gamma irradiation dose range. The frequency factor (~ 3.062 × 1021, S−1) and A.E. (~ 1.798 eV) of glasses were evaluated. This reveals that the TL behavior of glasses is a purely function of Ni2+ ions. Overall, the NSBL glasses prepared are mechanical hard, TL effective, optical and radiation shielding resources. [ABSTRACT FROM AUTHOR]

Abstract Glass materials of composition CaO–Y 2 O 3 –B 2 O 3 –P 2 O 5 added with different concentrations of NiO (Ni2+:CYBP) are synthesized by conventional rapid melt quenching method. Various physical properties of these glasses such as polaron radius (r p), molar volume (V m), optical basicity (Λ th) and refractive index (μ) are studied. As an elastic characterization Young's modulus (Y), Poison ratio (σ) and micro hardness (H) of these glasses are studied. These grades suggest that the prepared materials are mechanically hard and exhibiting covalently interlinked structure. Further these samples are characterized by various techniques such as differential thermal analysis, thermoluminiscence, optical absorption, photoluminescence, Ionic conductivity and dielectric dispersion. The thermoluminiscence grades such as peak temperature maximum (T m), shape symmetry factor (μ sf) and activation energies (E τ , E δ and E ω) are studied at various UV irradiation levels. These results strongly recommended that the both electron and hole trap centers were created at the deeper trap levels and contribute higher orders of thermoluminiscence emission with in these glasses subjected to higher orders of temperature and UV irradiation. The various optical absorption and photoluminescence factor's such as, optical band gap (E o), nephelauxetic ratio (β), emission cross section (Ω), branching ratio (ξ) and radiative life times (τ) are studied. These grades found to be maximum for the material which has 0.5 mol% of NiO concentration may be most suggestible for optoelectronic application. The dc and ac conductivity (σ dc & σ ac) of these glasses are estimated. The various dielectric parameter's such as loss tangent (Tan (ϕ)), temperature region of relaxation (ΔT), density of states near Fermi level (N(E f)), activation energies of both dipoles and conduction (E d and E c) are also calculated. These reports clearly disclose that the octahedrally located Ni2+ ions are increasing with increase NiO concentration with in present calcio yttria borophosphate glasses. [ABSTRACT FROM AUTHOR]

The chemical composition of (SiO 2) 59.9 – (PbO) 30 – (Pr 2 O 3) 0.1 – (Sb 2 O 3) x : (Al 2 O 3) y – x have chosen for present glass synthesis, where the variable 'x' varies from 0 to 10 mol% and againstly 'y' varies from 10 to 0 mol% with a step size of 2 mol%. The samples were characterized by structural, photo and thermoluminescence techniques. The evolutions of thermal stability, elastic modulus, micro hardness and glass transition quantities advised that they are mechanically hard in nature. The γ - irradiated trap-depth parameters such as A.E. (~0.371eV) and shape symmetry ratio (~0.236) related to the thermoluminiscence characterization advised that the sample code ' PAS 6 ' is a useful TL asset. The Judd - Ofelt quantities are derived from optical absorption spectra such as Ω 2 , Ω 4 and Ω 6 are found to be best for the glass code ' PAS 6 ' (~8.64, ~4.65 and ~3.88 × 10−20 cm2) is a useful optical resource. Radiative parameters derived from photoluminescence characterization such as spectroscopic quality factor (~1.198), effective bandwidth (Δλ ~ 32 nm), transition probability (A t = 1271 s−1), stimulated emission cross section (σ = 1.321 × 10−20 cm2), branching ratio (β ~ 49%) and radiative life time (τ rad = 217 μs) are advising that the sample code ' PAS 6 ' is a useful luminescent resource for various optical applications. • Thermal stability evaluations advised the glasses prepared were hard. • Trap depth parameters advised that the glass PAS 6 is a useful TL resource. • Glass PAS 6 found to be best in JO Parameters is a useful optical resource. • Radiative parameters directing that the glass PAS 6 is a useful PL asset. [ABSTRACT FROM AUTHOR]