Gd2O3 Content Research Articles

Effect of added gadolinium oxide on the thermal air oxidation of uranium dioxide

Based on studies indicating that addition of soluble oxides to UO2 increased resistance of UO2 to oxidation to U3O8, PNNL investigated the effects of doping UO2 with several soluble lanthanide oxides and zirconium oxide on stabilizing UO2. PNNL reports here on how 0 to 10 wt% Gd2O3 content affected UO2’s resistance to thermally induced air oxidation, reaction kinetics, and kinetic mechanisms as measured using differential scanning calorimetry and simultaneous thermogravimetric/differential thermal analysis.

Luminescence properties of Ce3+- doped borate scintillating glass for new radiation detection material

A series of glasses composed (Ce3+ and Gd3+) co-doped lithium aluminum borate glasses with composition 25Li2O–5Al2O3-XGd2O3-(69.5-X)B2O3-0.5CeF3 glasses were successfully synthesized by using a conventional melt-quenching technique and characterized through physical, structural and luminescence properties. The optimal doping concentration of CeF3 contents is 0.5 mol% and varying Gd2O3 concentration for studying the combined effect of dual doped glass. Further, the phenomenon of energy transfer from the host glass in luminescence center was observed by x-rays induced luminescence spectra, as well as from Gd3+to Ce3+ ions are confirmed by photoluminescence emission spectra. The strongest emission intensity of Ce3+emission is obtained when the scintillating glass contains 5.0 mol% of Gd2O3 concentration. From the nano-second decay time of glass exhibit a high potential for using as scintillating materials.

Structural and luminescence investigation of Ce3+ doped lithium barium gadolinium phosphate glass scintillator

Cerium-doped lithium barium gadolinium phosphate glass to with various concentration of Gadolinium and cerium have been investigated for this physical and optical properties. The density was determined by Archimedes' principle showed the relation of density and reflective index which depended on Gd2O3 and CeF3 concentrations. Their optical properties were investigated by luminescence spectra under UV and x-rays excitations. The emission and excitation spectra of Ce3+ ion exhibited strong intensity at 338–346 nm (λEX = 302 nm) and at 332–342 nm (λEX = 302 nm) with the concentration of Gd2O3 at 18 %mol for various concentration of Gd2O3 and concentration of CeF3 at 1.0 mol%, respectively. The UV–Vis transmission spectra showed the red shift with the higher concentration of Gd2O3. The oxidation of Ce3+ ions and Ce4+ ions of samples were demonstrated by using X-ray Absorption Near Edge spectroscopy (XANE). In addition, the decay time of samples are very short, in the range of 14–16 ns, which is an important property to improve to the radiation detector. The energy loss by alpha particle was calculated by SRIM program. The result showed the stopping ions range were increased with increasing of alpha energy.

Luminescence and physical properties of Ce3+-doped potassium gadolinium phosphate glasses for radiation detector application

This work aimed to study the effect of Gd2O3 and CeF3 modified on potassium gadolinium phosphate glasses scintillators in 17K2O: xGd2O3: (82.5-x)P2O5: 0.5CeF3 (where x = 9, 11, 13, 15 and 17 mol%) and 17K2O: 17Gd2O3: (66-x)P2O5: xCeF3 (where x = 0.1, 0.3, 1, 1.5, 2, 3 and 5 mol%) systems produced by the melt quenching technique. The physical, optical, and scintillation properties of the specimens were measured and discussed. The density and molar volume of the glasses trend to increases with increasing Gd2O3 concentration, while an invariable for all CeF3 concentration. The photoluminescence and x-ray luminescence spectrums show the highest value at 9 and 17 mol% of Gd2O3 concentration, respectively, which shows the decay time between 15.02 and 22.84 ns. XANES results shows the main oxidation state of Ce is 3+ ion for all glasses. However, the photoluminescence and x-ray luminescence spectrums show the maximum value at 5 mol% of CeF3 concentration, which shows the fast decay time between 16.26 and 36.02 ns. These results of the x-ray induced luminescence and the fast decay time in nanoseconds level are possible applied as well as the scintillation materials for radiation detector application.

Structural and luminescence study of Dy3+ doped phosphate glasses for solid state lighting applications

Abstract The present study reports the preparation and analysis of physical, luminescence and structural properties of Dy2O3 doped phosphate glasses. The density and refractive index demonstrate increasing tendency as Dy2O3 concentration increased. The luminescence concentration quenching point is observed at 1.0 mol% of Dy2O3 and 17 mol% of Gd2O3 concentration, when monitored at 350 nm and 275 nm respectively. Similarly, the Judd-Ofelt (JO) theory used to calculate JO intensity parameters (Ω2, Ω4 and Ω6). These parameters show Ω2>Ω4>Ω6 trend. It is recorded that 4F9/2 → 6H13/2 transition has higher values of transition probabilities, branching ratio and emission cross-section parameters. The calculated and experimental results for the radiative properties were compared with each other and with previous reported studies. The decay time is obtained with the emission and excitation of 573 and 350 nm respectively and it is found that, the decay time decreases with increasing Dy3+ concentration. Photoluminescence decay curve analysis and Radio luminescence (X-ray source) decay curve analysis was analyzed. The prepared samples were studied through XANES and EXAFS analysis to understand the local environment of Gd and Dy atom. Gadolinium and Dysprosium show +3 oxidation states in the present glass. Bond distance of Gd–O and Gd–Gd decreases with increase in Gd2O3 content.

Synthesis and morphology of nanodisperse cerium oxide modified by gadolinium oxide

Stable sols were obtained in the CeO2–Gd2O3 system using the stabilizing additive Hamulsion RUGLAP. The formation of phases in the CeO2–Gd2O3 system with Gd2O3 content of up to 0.07 mol occurs already at the stage of synthesis by the Krekke method. The electrokinetic potential is positive for all samples. A sharp increase in the electrokinetic potential (with Gd2O3 content of over 0.07 mol) is connected with a change in the nature of potential-determining ions of the electrical double layer and the diffusion of excess Gd3+ ions from the solid core of a colloidal particle into its surface. The absorption spectra were analyzed to determine the band gap of colloidal sol particles. With an increase in the cerium oxide content in the sol with the stabilizer (CeO2–Stab), the value of the band gap energy for direct and indirect transitions increases. An additional absorption band appears in the sol spectra based on the CeO2–Gd2O3–Stab system in the 265 ÷ 275 nm wavelength range, the value of the band gap energy for direct transitions 4.46–4.62 eV, presumably, corresponds to solid solutions of Ce1−yGdyO2 type. The suggested stabilizer, which contains silicon oxide, guar gum, and gelatin, is neutral with respect to positively charged sol particles. It is adsorbed on the surface of dispersed particles and isolates them from each other, without causing coagulation of the sol. When gadolinium oxide (0.01 mol) is added to the CeO2 sol, an average particle size decreases to 13 ± 2.8 nm. The nanoparticles are weakly agglomerated, if Gd2O3 content in the sol is up to 0.05 mol; with increasing gadolinium oxide content the size of agglomerates increases. The processes of sol dehydration proceed in the range of 65–90 °C. The activation energy of these processes is in the range of 51–54 kJ/mol. The values of activation energies indicate the presence of moisture in a bound state in the structure of the stabilizing additive Hamulsion RUGLAP.

Switching Field Control by Utilizing Ferromagnetic Grain Boundary in Cap Layer for CoPt-Based Full Granular Media

Investigation of magnetic properties and nanostructure for full granular media with CoPt−Gd2O3 granular cap layers (CLs) of various Gd2O3 content were conducted. Media with low surface roughness of 0.19 nm is maintained even though Gd2O3 content is reduced from 30 to 5 vol%, which is lower than that of media with CoPtCrB continuous CL. The result is supported by surface morphology observed by transmission electron microscopy. According to cross section element analysis, homogeneous nanostructure in the thickness direction with one- text on-one columnar growth of magnetic grain is observed. Reduction of Gd2O3 content increases indirect intergranular exchange coupling through CL which results in media with higher nucleation field and lower saturation field than that of media with CoPtCrB continuous CL. Furthermore, at a CL thickness of 6 nm, when Gd2O3 content is reduced from 30 to 15 vol%, switching field distribution is reduced from 0.11 to 0.05. These results suggest that the reduction of Gd2O3 content of the CoPt−Gd2O3 granular CL is effective to reduce the switching field distribution of the full granular media to be lower than that of media with CoPtCrB continuous CL while retaining the extremely smooth media surface.

DC bias characteristics of BaTi0.65Zr0.35O3 with additives (Gd2O3, SiO2, MgO) for multilayer ceramic capacitors

In this study, BaTi0.65Zr0.35O3-2 mol% MgO ceramics with various amounts of Gd2O3 and SiO2 additives were prepared via a solid-state reaction method. The densification temperature of the BaTi0.65Zr0.35O3-2 mol%, MgO-2 mol%, and SiO2 ceramic was 1275 °C, with the addition of less than 2.0 mol% Gd2O3. The Gd3+ ions preferentially replaced the A-site ions. The densification temperature was reduced to 1225 °C, and the grain size of the ceramics was grown significantly up to 2.96 μm for 2 mol% Gd2O3, in addition to the formation of a trace amount of Ba2GdZrO5.5. There was a significant decline in the value of tanδ, and the electrical resistivity was increased by almost an order of magnitude due to the decrease in the VO•• concentration and the larger grain size. When the Gd2O3 content exceeded 2 mol%, the Gd3+ ions entered the B-site positions. For 5 mol% Gd2O3, the densification temperature is increased to over 1350 °C, the grain size reduced to 0.84 μm, and the value of tanδ is increased and the electrical resistivity is decreased as a result of the increasing VO•• concentration. The temperature coefficient of capacitance curves shows a nearly linear relationship between temperature and negative temperature coefficient and rotate counter-clockwise with an increase in Gd2O3 and SiO2 content. The BaTi0.65Zr0.35O3-2 mol% MgO-2 mol% SiO2 ceramics had a dielectric constant of 871 at room temperature, which decreased to 417 for 5 mol% Gd2O3. The dielectric constant of the BaTi0.65Zr0.35O3-2 mol% MgO ceramics, with and without the 2 mol% SiO2 additive, steadily declined by 10.2% at a bias field of 2.5 KV/mm. The magnitude of change in the dielectric constant has reduced significantly to 1.33% for the 5 mol% Gd2O3 additive.

Facile synthesis and characterization of novel Gd2O3–CdO binary mixed oxide nanocomposites of highly photocatalytic activity for wastewater remediation under solar illumination

In this study, pure cadmium oxide (CdO) nanoparticles and mixed gadolinium oxide (Gd2O3)–CdO nanocomposites with different Gd2O3 contents (0–15%) were synthesized by a facile precipitation technique followed by calcined treatment. The X-ray diffraction analysis illustrated that all samples had high cubic-phase purity and a good crystallinity. Further support for the formation of highly pure CdO and Gd2O3 phases was obtained via infrared spectroscopy. The morphologies of pure CdO and mixed Gd2O3–CdO nanoparticles were probed by scanning electron and transmission electron microscopy, which demonstrated that the collected samples consisted of individual semi-spherical shaped entities of different particle sizes (23–31 nm). The optical band gap of the developed samples was computed based on the Tauc equation and showed a decrease from 3.41 to 2.75 eV upon increasing the Gd2O3 content. The 3D fluorescence analysis showed that the quenching in the emission peak intensity with increasing Gd2O3 content was due to the high separation efficiency of photogenerated electron–hole pairs. Moreover, the Gd2O3(15%)–CdO nanocomposite showed superior photodegradation efficiency (89.1%) of methylene blue compared to 44.4% for pure CdO. At pH 11.5, >3-fold enhancement in degradation rate (0.044 min −1) was obtained compared to natural pH 9.6. Reusability study showed stability of the Gd2O3–CdO photocatalyst in four cycles of methylene blue degradation. Trapping experiment of holes and electrons revealed extensive contribution of holes rather than electrons in producing active oxidizing species.

Local structure in gadolinium-lead-borate glasses and glass-ceramics

The rare earth ion doped materials having the xGd2O3•(100-x)[4B2O3•Pb] composition where x = 0–50 mol% Gd2O3 were synthetised by the melt queching method. XRD data show the formation of the Pb and Pb2O crystalline phases in the glass ceramics. The gadolinium ions can be intercalated into the host matrix by the deforming of B-O-B angles and the formation of modified [BO3] structural units. The UV–Vis data indicate a decrease in non-bridging oxygen ions concentrations by the adding of Gd2O3 contents in the glass host.The presence and the intensity of the resonance lines situated at about g~ 2, 2.8, 4.8 and 6 assigned to Gd+3 ions depend on the Gd2O3 concentration in vitroceramic.The near-edge features of the Gd L3 edge spectra show that the peak intensity differed with the adding of the higher Gd2O3 content in the host matrix suggesting that local symmetry around the Gd central atoms are slight distorsions.

Thermal and structural modification in transparent and magnetic germanoborate glasses induced by Gd2O3

A series of new transparent and magnetic germanoborate glasses in the system (100-x)[60GeO2–25B2O3–10Na2O–4Al2O3–1PbO] – (x) Gd2O3, with x = 0, 1, 2, 5, 10, 15 and 20 mol%, was prepared and studied with respect to their thermal and structural changes in the presence of Gd2O3. Based on Differential Scanning Calorimetre (DSC) analysis, a glass with 5% of Gd2O3 showed a high thermal stability, which progressively decreases for samples with higher content of Gd2O3. By the analysis of Raman and Fourier Transform Infrared (FTIR) spectra, it was possible to identify that by increasing the amount of Gd2O3, a progressive depolymerization of 6-membered Ge[IV] rings is promoted, concomitant with an increase of Ge[IV] tetrahedra units with non-briding oxygens. The structural analysis through the local-sensitive techniques EXAFS (Extended X-ray Absorption Fine Structure) and XANES (X-ray Absorption Near Edge Structure) showed that the short-range structural modification around the elements Ge and Gd3+ does not change with the addition of Gd2O3 and the presence of germanium four-fold coordination [GeIV] and Gd3+ states, respectively. A simulation of the coordination number (N), the interatomic distance (R) of Ge–O and Gd–O bonds and the Debye-Waller factor was also carried out. The microstructure, after crystallization, of the sample with 15 mol% of Gd2O3 was evaluated using optical and electron microscopes. Finally, the paramagnetic behaviour and ion probe quantification of Gd3+ ions were obtained based on magnetic susceptibility measurements.

Evaluation of Structural and Thermal Properties of Ce1-yGdyO2-x Solid Solution

In the present study, the systematic evaluation of thermal properties was performed for CeO2–Gd2O3 (Gd2O3 = 0–15 wt%) samples. Gd2O3 doping into CeO2 reduced the grain size of CeO2–Gd2O3 solid solution and caused the expansion of the lattice parameter. The thermal conductivity of CeO2–Gd2O3 solid solutions decreased with increasing Gd2O3 content and decreased with temperature up to nearly 900 K, though the decreasing rates became smaller at a higher temperature. The values of the thermal conductivity were mostly attributed to phonon mean free path which decreased due to the Umklapp processes at high temperatures and reduced by phonon scattering due to Gd dopants and oxygen vacancies at low temperatures. The phonon scattering caused by grain boundaries, and chemical impurities can be neglected, and the isotope effect is considered to be small.

Photocatalytic visible-light-driven removal of the herbicide imazapyer using nanocomposites based on mesoporous TiO2 modified with Gd2O3

In this work, mesoporous Gd2O3-TiO2 nanocomposites synthetized by a sol–gel with vary Gd2O3 concentration were investigated for photo-destruction of imazapyr herbicide waste. Textural, structural and surface properties of the synthetized nanocomposites are verified by N2 physisorption, X-ray diffractometry, HRTEM and various spectroscopic techniques (FTIR, DRS UV–Vis, Raman, PL and XPS). HRTEM micrographs of the calcined Gd2O3-TiO2 revealed the existence of a mesoporous matrix consisting of homogeneously distributed TiO2 nanoparticles (NPs, 12 nm) which are decorated with Ga2O3 nanoparticles. It was found a reverse correlation between the amount of Gd2O3 concentration and the TiO2 nanoparticle size: the formation of smaller TiO2 nanoparticles was favored by the use of high Gd2O3 concentration. The photocatalytic efficiency of the synthetized Gd2O3-TiO2 nanocomposites was appraised in the photo-destruction of imazapyr herbicide below visible-light irradiation. The best herbicide destruction was achieved using 3%Gd2O3-TiO2 photocatalyst and degraded the imazapyr herbicide 20.5 and 8.2 times faster than a commercial P25 and non-promoted TiO2, respectively, indicating that modification of TiO2 with Gd2O3 led to a significant improvement of photocatalyst efficiency. This was explained as due to a lessening of the apparent optical bandgap and the formation of a large amount of surface defect states favoring the separation between electrons and holes. Besides its high efficiency, the 3%Gd2O3-TiO2 photocatalyst demonstrated to be recyclable and stable in the visible-light-driven photocatalytic destruction of imazapyr herbicide.

In situ synthesis of polycrystalline cubic boron nitride in cBN–Al–Ti system with different Gd2O3 additions

Polycrystalline cubic boron nitride was sintered under high temperature (1400 °C) and high pressure (5.5 GPa) using an in situ synthesis method. The composition, microstructure, relative density and mechanical properties of the polycrystalline cubic boron nitride (PcBN) with different contents of Gd2O3 were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The results show that the phases of TiB2, TiN, AlN, AlTi2N and GdB6 are formed through in situ synthesis of cBN–Al–Ti–Gd2O3 system. With the Gd2O3 content increasing, the relative density increases and mechanical properties of PcBN begin to increase and then decrease. Proper amount of Gd2O3 can advance the formation of TiB2 and improve the aspect ratio of TiB2. When Gd2O3 content is 1.0 wt%, the PcBN exhibits optimal comprehensive mechanical properties, with a microhardness of 33.35 GPa and a flexural strength of 972.37 MPa.

Thermal analysis of the oxide–chloride systems GdCl3–Gd2O3 and GdCl3–KCl–Gd2O3

The thermal analysis of the oxide–chloride systems GdCl3–Gd2O3 and GdCl3–KCl–Gd2O3 with the Gd2O3 content up to 0.09 mol fractions was studied in the temperature range 298–1173 K using two methods: differential scanning calorimetry and the method of cooling curves. The liquidus temperatures in these systems have been determined. The solubility of the oxide and the thermodynamic characteristics of the dissolution process were calculated. It was established experimentally that the dissolution of Gd2O3 proceeds by a chemical mechanism, with the formation of GdOCl oxychloride. The received data revealed the main regularities of Gd2O3 solubility in molten GdCl3–KCl–Gd2O3 systems.

Photoluminescence properties and energy transfer investigations of Gd3+ and Sm3+ co-doped ZnO–BaO–TeO2 glasses for solid state laser application

The physical, optical, photoluminescence properties of (54-x) TeO2 − 10ZnO − 35BaO − 1Sm2O3 − xGd2O3, where 0 ≤ x ≤ 3 (mol %) are investigated in this research. Five samples of glass were produced by the normal melt quenching process. The evidence indicates that the density of glass increased with increasing of Gd2O3. The molar volume and refractive index investigations have been used to consider the physical properties and optical properties of the produced glass system. Physical parameters such as polaron radius, inter-ionic radius and field strength for Sm3+/Gd3+ ions have been evaluated. The absorption spectra of glass contain peaks at 358, 404, 948, 1,085, 1,235, 1,385, 1490 and 1535 nm corresponding to the transitions from 6H5/2 to 4D3/2, 6P3/2, 6F11/2, 6F9/2, 6F7/2, 6F5/2, 6F3/2, and 6H15/2, respectively. The emission spectra of glass show four bands at found and attributed to 563, 604, 646 and 709 nm by excitation at 275 nm. Judd-Ofelt parameters and radiative properties was investigated for 53.5TeO2 − 10ZnO − 35BaO − 1Sm2O3 − 0.5Gd2O3 glass. Energy transfer characteristics was observed in the present glasses. The emission intensity of Sm3+ increased with increasing of Gd2O3 concentration until 2 mol %, while the luminescence lifetime decreases with increasing of Gd2O3 content.

Ionizing photons attenuation characterization of quaternary tellurite–zinc–niobium–gadolinium glasses using Phy-X/PSD software

In this work, photon attenuation performances of the selected TeO2–ZnO–Nb2O5–Gd2O3 glasses have been investigated at various energy points using Phy-X/PSD software. Additionally, neutron shielding properties have been estimated. Dependencies of radiation attenuation capacities with the photon energy and the compositions have been evaluated. According to the obtained results, the mass attenuation coefficients and the effective atomic numbers of tellurite glasses doped with Gd2O3 content of 2.5 mol% are higher than rest of the other samples. Moreover, half value layer and mean free path values of the investigated glass samples recommended that the attenuation capabilities of the ionizing photons increase as the densities of samples increase, hence, the glass having high density must be considered for high attenuation effectiveness. The mass attenuation coefficients vary from 4.87426 to 5.25794 cm2/g for Gd2O3 concentrations with 0 (Gd = 0.0) and 2.5 mol% (Gd = 2.5) at 0.06 MeV. The mean free path values at 0.015 MeV lies within the range 0.00407–0.00493 cm, at 0.1 MeV within the range of 0.1256 to 0.1519 cm, while at 15 MeV has the range of 4.634 to 5.281 cm. The obtained results displayed that among the studied glasses, Gd = 2.5 glass sample with Gd2O3 of 2.5 mol% is found to have superior gamma-ray shielding effectiveness due to having both higher μ/ρ and lower mean free path values.

The impact of Gd2O3 on nuclear safety proficiencies of TeO2–ZnO–Nb2O5 glasses: A GEANT4 Monte Carlo study

This work was carried out to specify the effect of Gd2O3 on the gamma and neutron radiation shielding capacities of tellurite rich glasses with 75TeO2+15ZnO+(10-x)Nb2O5+xGd2O3 (TZNG), where (x = 0, 1, 1.5, 2 and 2.5 mol%) nominal composition. The mass attenuation coefficients (μ/ρ) of the studied glasses were acquired with GEANT4 Monte Carlo codes and the results were found to match the theoretical Phy-X values. Next, the variables of Effective atomic number (Zeff), Half Value Layer (HVL) and Mean Free Path (MFP) were calculated employing μ/ρ values. According to the corollaries, the increment of Gd2O3 insertion to the tellurite based glasses was enhanced the μρ and Zeff values for total photon, electron, proton and alpha interactions whereas it was dropped the HVL and MFP values. It is also observed that the total stopping powers of the glasses for electron interaction were declined. The geometric progression (GP) approximation was employed to determine the exposure buildup factor (EBF) for the proposed glasses. The EBFs showed the lowest values for TZNG-E glass with 2.5% mole Gd2O3 addition. Finally, the fast neutron reduction capacity of the TZNG glasses was surveyed by calculating the effective removal cross-sections (ΣR) of the glasses. It is determined that the ΣR values increased with enhancing Gd2O3 content since the addition of Gd2O3 increased the glass density. Consequently, the TZNG-E glass with the highest Gd2O3 additive is the more skillful nominee for gamma-ray and neutron security applications among the investigated glasses.

Effects of Sm2O3 and Gd2O3 in poly (vinyl alcohol) hydrogels for potential use as self-healing thermal neutron shielding materials

This work investigated the mechanical, self-healing, and thermal neutron shielding properties of poly (vinyl alcohol) (PVA) hydrogels with the addition of varying samarium oxide (Sm2O3) or gadolinium oxide (Gd2O3) contents from 0 to 10.5 wt% in 3.5 wt% increments, prepared using a freezing/thawing method. The results showed that the addition of Sm2O3 and Gd2O3 fillers could greatly enhance the thermal neutron shielding properties of the PVA hydrogels, in which Gd2O3/PVA hydrogels had slightly higher neutron shielding efficiencies than Sm2O3/PVA hydrogels at the same filler content and thickness. Additionally, both the Sm2O3/PVA and Gd2O3/PVA hydrogels showed autonomously self-healing capabilities at damaged/fractured surfaces, with the healing time and filler content affecting the recoverable strength of the self-healed specimens. In terms of mechanical properties, increasing the Sm2O3 or Gd2O3 contents resulted in the increases of tensile modulus and tensile strength but the decrease in elongation at break of the hydrogels, in which Gd2O3/PVA hydrogels showed higher overall tensile properties than Sm2O3/PVA hydrogels at the same filler contents. In summary, the overall properties suggested that Sm2O3/PVA and Gd2O3/PVA hydrogels presented potentials to be utilized as self-healing thermal neutron shielding materials, in which the materials could be applied as a replacement of paraffin in transport casks or as a patient's shielding biomaterial used during medical diagnosis and radiotherapy.

Effect of Gd2O3 on the radiation shielding characteristics of Sb2O3–PbO–B2O3–Gd2O3 glass system

In this work, with the help of Phy-X/PSD software, we studied the radiation shielding characteristics of 25Sb2O3–30PbO–(45−y) B2O3–yGd2O3 glasses (with y = 0, 0.2, 0.4, 0.6, 0.8 and 1.0 mol%). The mass attenuation coefficient (μ/ρ) shows a progressive reduction with increase of energy, which denotes that the shielding efficiency of the PbSbBGd0- PbSbBGd1 glasses reduces when the energy was increased. The μ/ρ at 284 keV takes the values between 0.25988 and 0.26022 cm2/g and reduces to 0.18658 cm2/g (for PbSbBGd0) and 0.18673 (for PbSbBGd1) cm2/g at 347 keV. In addition, reasonable elevation in the linear attenuation factor (μ) values was observed with the addition of Gd2O3. This implies that, an improvement in the gamma rays shielding characteristics has occurred with the addition of Gd2O3. PbSbBGd1 sample had the largest μ values compared to all other glasses and equal to 1.418, 1.018, 0.401, 0.297 and 0.220 cm-1 at 284, 347, 826, 1275 and 2506 keV respectively. The results show that the replacement of B2O3 by Gd2O3 increases the effective atomic number (Zeff) for the PbO–Sb2O3–B2O3–Gd2O3 glass system and the Zeff of PbSbBGd1 is higher than that of PbSbBGd0- PbSbBGd0.8 samples, whereas that of PbSbBGd0 is the lowest. The mean free path (MFP) shows strong energy dependence and becomes larger at higher energies. The MFP shows gradual decrease, as the content of Gd2O3 was increased at the expense of B2O3 which implies that radiation attenuation features for the PbSbBGd0- PbSbBGd1 specimen have improved with more amount of Gd2O3. The least half value layer (HVL) is found at 284 keV for all concentrations of Gd2O3 and equals to 0.537 cm (for PbSbBGd0) and 0.489 cm (for PbSbBGd1). While, the highest HVL is registered at 2506 keV and equals to 3.456 cm for PbSbBGd0 and 3.152 cm for PbSbBGd1.