Abstract:Melt and quench technique was used for the preparation of glassy samples of the composition x Bi 2 O 3 -(1-x) B 2 O 3 where x= .05 to .040. XCOM computer program is used for the evaluation of gamma-ray shielding parameters of the prepared glass samples. Further the values of mass attenuation coefficients, effective atomic number and half value layer for the glassy samples have been calculated in the energy range from 1KeV to 100GeV. Rigidity of the glass samples have been analyzed by molar volume of the prepar… Show more
“…It can be inferred that an expansion in the glass network was occurred with the addition of bismuth oxide, which may be due to increase nonbridging oxygen bonds and larger ionic radius of Bi 3+ (1.03 Ǻ) compared to B 3+ (0.27 Ǻ). This result is consistent with previous related studies 41,42 . This explanation was reinforced when the values of oxygen packing density reduced (126.919 to 77.806 g.atom.l −1 ) with increasing of Bi 2 O 3 content.…”
Section: Resultssupporting
confidence: 93%
“…This result is consistent with previous related studies. 41,42 This explanation was reinforced when the values of oxygen packing density reduced (126.919 to 77.806 g.atom.l −1 ) with increasing of Bi 2 O 3 content. Regarding the optical basicity, an inversely proportion was reported with increasing of bismuth oxide bond strength.…”
Section: Density Measurements and Related Parametersmentioning
The current study shows a new attempt to develop gamma‐ray shielding glasses. The proposed glass is a borate‐base composition modified with sodium and cadmium oxides and different concentrations of bismuth oxide. Based on the melt‐quenching technique, we prepared four glass compositions of 20NaO‐15CdO‐ (65−x)B2O3‐xBi2O3, where x = 0, 10, 20, and 30 mol%. The amorphous nature of the prepared samples was confirmed by XRD. To get more details about the structure, FTIR and UV‐Vis‐NIR were performed to characterize the prepared glasses. Moreover, we used ab initio molecular dynamics simulations to create the possible structures of the new compositions, and compared with the experimental measurements. A series of shielding parameters was investigated based on the gamma‐ray emission in the range of 0.01‐10 MeV. The results revealed an improvement of the shielding parameters with increasing of Bi2O3 content. The sample with the highest Bi2O3 (S4) has the highest Zeff and least HVL, while S1 (with no Bi2O3 content) has the lowest Zeff at all energy levels. The gamma‐ray transmission factor of the prepared glasses was compared with some commercial concretes. Finally, the new glasses especially with highest Bi2O3 are recommended to use in gamma radiation shielding facilities.
“…It can be inferred that an expansion in the glass network was occurred with the addition of bismuth oxide, which may be due to increase nonbridging oxygen bonds and larger ionic radius of Bi 3+ (1.03 Ǻ) compared to B 3+ (0.27 Ǻ). This result is consistent with previous related studies 41,42 . This explanation was reinforced when the values of oxygen packing density reduced (126.919 to 77.806 g.atom.l −1 ) with increasing of Bi 2 O 3 content.…”
Section: Resultssupporting
confidence: 93%
“…This result is consistent with previous related studies. 41,42 This explanation was reinforced when the values of oxygen packing density reduced (126.919 to 77.806 g.atom.l −1 ) with increasing of Bi 2 O 3 content. Regarding the optical basicity, an inversely proportion was reported with increasing of bismuth oxide bond strength.…”
Section: Density Measurements and Related Parametersmentioning
The current study shows a new attempt to develop gamma‐ray shielding glasses. The proposed glass is a borate‐base composition modified with sodium and cadmium oxides and different concentrations of bismuth oxide. Based on the melt‐quenching technique, we prepared four glass compositions of 20NaO‐15CdO‐ (65−x)B2O3‐xBi2O3, where x = 0, 10, 20, and 30 mol%. The amorphous nature of the prepared samples was confirmed by XRD. To get more details about the structure, FTIR and UV‐Vis‐NIR were performed to characterize the prepared glasses. Moreover, we used ab initio molecular dynamics simulations to create the possible structures of the new compositions, and compared with the experimental measurements. A series of shielding parameters was investigated based on the gamma‐ray emission in the range of 0.01‐10 MeV. The results revealed an improvement of the shielding parameters with increasing of Bi2O3 content. The sample with the highest Bi2O3 (S4) has the highest Zeff and least HVL, while S1 (with no Bi2O3 content) has the lowest Zeff at all energy levels. The gamma‐ray transmission factor of the prepared glasses was compared with some commercial concretes. Finally, the new glasses especially with highest Bi2O3 are recommended to use in gamma radiation shielding facilities.
“…Concrete is efficient and cheap, and can be easily shaped into any desired design [4]. However, there are some limitations related to concrete, such as its opacity, preventing visible light from passing through, and its mechanical strength being reduced when exposed to radiation for a longer period of time [5][6][7][8]. Glass is a type of radiation shielding material that can be an alternative to concrete for protection from radiation risks due to its remarkable chemical and physical properties, such as excellent optical transparency to visible light, simplicity of manufacturing, nontoxicity , low cost, and its physical characteristics, such as density and effective atomic number, can be changed by inserting heavy metal oxides into the glass network for use as radiation shielding material [9][10][11].…”
The current study aims to enhance the efficiency of lead-free glass as a shielding material against radiation, solve the problem of the dark brown of bismuth glass, and reduce the accumulation of waste glass disposed in landfills by using soda-lime-silica SLS glass waste. The melt-quenching method was utilized to fabricate (WO3)x[(Bi2O3)0.2(ZnO)0.3(B2O3)0.2(SLS)0.3]1−x at 1200 °C, where x= (0, 0.01, 0.02, 0.03, 0.04, and 0.05 mol). Soda lime silica SLS glass waste, which is mostly composed of 74.1 % SiO2, was used to obtain SiO2. Radiation Attenuation parameters were investigated using narrow-beam geometry and X-ray fluorescence (XRF). Furthermore, the parameters related to radiation shielding were calculated. The results showed that when WO3 concentration was increased, the half-value layer was reduced, whereas the μ increased. It could be concluded that WBiBZn-SLS glass is a good shielding material against radiation, nontoxic, and transparent to visible light.
“…), which have shown enhanced radiation shielding characteristics. 6,9,11,12,14,19,21,[24][25][26][27][28][29][30] As glasses with HMO constituents, especially those of high bismuth content, are found to be effective in radiation shielding, we have investigated the gamma attenuation characteristics of bismuth borate glasses modified with different fractions of BaO in this study. Barium and bismuth content were varied in equal mole fractions of BaO and Bi 2 O 3 , that is, x(BaO-Bi 2 O 3 )-(1-x)B 2 O 3 (herein after referred to as barium bismuth borate [BBB]) system, where x = .15, .25, .…”
Section: Introductionmentioning
confidence: 99%
“…Specifically, there are reports on high‐content bismuth‐based glasses and glasses modified with different amounts of HMO (e.g., BaO, Bi 2 O 3 , etc. ), which have shown enhanced radiation shielding characteristics 6,9,11,12,14,19,21,24–30 …”
Transparent dense barium bismuth borate (BBB) glasses in ternary x(BaO-Bi 2 O 3 )-(1-x)B 2 O 3 system, with x = . 15, .25, .35, and .45, were prepared by the meltquenching process. Density of the glasses increased to 7.145 g/cm 3 with increasing BaO-Bi 2 O 3 content. Gamma radiation shielding performance of the glasses was estimated by studying mass attenuation coefficients (MAC) and effective atomic numbers, using XCOM software as a function of photon energy. Subsequently, experimental MAC values of the glasses were measured using 152 Eu and 60 Co sources by the radiation transmission method. Measured and calculated MAC values of the glasses were in close agreement. Equivalent atomic numbers, exposure, and energy absorption buildup factors were analyzed at different mean free paths and photon energies using Phy-X software. Dense glasses exhibited large effective atomic numbers and radiation shielding characteristics comparable with the dense heavy metal oxide glasses. Effective atomic numbers of the glasses were found to be close to the heavy metallic elements (Pb, W, and Hf) at low gamma energies. Radiation shielding ability of the glasses is discussed by comparing with the recently reported radiation shielding glasses and conventional shielding materials. Lead-free and dense transparent BBB glasses in the present study can be effective in radiation shielding for radiological applications.
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