Influence of La2O3 on the structural, mechanical and optical features of cobalt doped heavy metal borate glasses

Abul-Magd, Ashraf A.; Abu-Khadra, Ahmad S.; Abdelghany, A. M.

doi:10.1016/j.ceramint.2021.03.326

Cited by 43 publications

(8 citation statements)

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“…In this study, a group of lanthanum-oxide-reinforced heavy metal borate glasses with the chemical formula 0.3CoO-(80-x)B 2 O 3 -19.7PbO-xLa 2 O 3 : x = 0, 0.5, 1, 1.5, and 2 mol% were investigated in terms of their extensive gamma-ray shielding parameters. Previously, Abul-Magd et al [13] studied the effect of the rare-earth compound lanthanum oxide on the structural, mechanical, and optical properties of a glassy system composed of cobalt-doped heavy metals. Our objective was to conduct a theoretical follow-up analysis on those glass samples in order to provide new skills and information to the scientific community by analyzing their gamma-ray shielding properties.…”

Section: Methodsmentioning

confidence: 99%

Enhancement of Gamma-ray Shielding Properties in Cobalt-Doped Heavy Metal Borate Glasses: The Role of Lanthanum Oxide Reinforcement

et al. 2021

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The direct influence of La3+ ions on the gamma-ray shielding properties of cobalt-doped heavy metal borate glasses with the chemical formula 0.3CoO-(80-x)B2O3-19.7PbO-xLa2O3: x = 0, 0.5, 1, 1.5, and 2 mol% was examined herein. Several significant radiation shielding parameters were evaluated. The glass density was increased from 3.11 to 3.36 g/cm3 with increasing La3+ ion content from 0 to 2 mol%. The S5 glass sample, which contained the highest concentration of La3+ ions (2 mol%), had the maximum linear (μ) and mass (μm) attenuation coefficients for all photon energies entering, while the S1 glass sample free of La3+ ions possessed the minimum values of μ and μm. Both the half value layer (T1/2) and tenth value layer (TVL) of all investigated glasses showed a similar trend of (T1/2, TVL)S1 > (T1/2, TVL)S2 > (T1/2, TVL)S3 > (T1/2, TVL)S4 > (T1/2, TVL)S5. Our results revealed that the S5 sample had the highest effective atomic number (Zeff) values over the whole range of gamma-ray energy. S5 had the lowest exposure (EBF) and energy absorption (EABF) build-up factor values across the whole photon energy and penetration depth range. Our findings give a strong indication of the S5 sample’s superior gamma-ray shielding characteristics due to the highest contribution of lanthanum oxide.

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Section: Methodsmentioning

confidence: 99%

Enhancement of Gamma-ray Shielding Properties in Cobalt-Doped Heavy Metal Borate Glasses: The Role of Lanthanum Oxide Reinforcement

et al. 2021

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“…The software could calculate the Mass Attenuation Coefficient, μ m , linear attenuation coefficient (μ L ), Half Value Layer, (HVL), Tenth Value Layer (TVL), Effective Atomic Number Zeff, Effective Atomic Cross Section, δ a , Total Electronic Cross Section, δ e , and many other radiation shielding features of a materials. The glass we named in this work as S1, S2, S3, S4 and S5 with chemical compositions and densities given in (Table 1) are fabricated by (Abul-Magd et al, 2021). We made use of Phy-X/PSD to simulate the irradiation of the glasses with gamma ray from Cobalt-60 radionuclide and evaluated the effect of adding La2O3 to the radiation shielding features of the glasses.…”

Section: ……………………………… (6)mentioning

confidence: 99%

“…Studies by (Abdel-Ghany et al, 2020) on the influence of iron oxide (Fe2O3) on the optical and the structural properties of some Borate glasses mixed with CaO and Na2O3 found that, the increase in Fe2O3 results in the decrease in the chemical bond energy and the bond force constant in the glass. Borate glasses doped with Cobalt was studied by (Abul-Magd et al, 2021) in order to determine the effect of the rare-earth oxide, Lanthanum Oxide (La2O3) on its properties. The glasses were found optically active and could be utilized for nonlinear optical applications.…”

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confidence: 99%

“…The glasses were found optically active and could be utilized for nonlinear optical applications. Lead Borate glass has been recommended for having good radiation shielding ability, thermal stability, and optical applications (Abul-Magd et al, 2021). We, therefore, in the present work, aimed at studying the effect of the La2O3 additive on the radiation shielding properties of Cobalt doped borate glasses.…”

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Effect of La2O3 Additive on the Radiation Shielding Properties of Cobalt-doped Borate Glasses

Alhassan¹,

Ibrahim²,

Muazu³

2023

jasem

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Radiation protection becomes a necessary action in radiology, Nuclear Medicine, Radiotherapy and other institutions which make use of radiation. The aim of this work is to evaluate the radiation protection features of cobalt-doped borate glass with La2O3 additive. The glasses named here as S1, S2, S3, S4 and S5 with 0, 0.5, 1, 1.5 and 2 mol% of La2O3 respectively were assessed for their Linear Attenuation Coefficient, LAC, Mass Attenuation Coefficient, MAC, Half value Layer, HVL and Effective Atomic Number Zeff. We found that the glasses have LAC, MAC and Zeff higher than ordinary concrete and Ilmenite concrete, especially S3 which has the concentration of 1 mol% of La2O3 and has lowest HVL at lower energies below 0.1 MeV and above 4 MeV than the other samples, and also found that S5 with 2 mol% of La2O3 is more advantageous for energy range 0.1 - 4 MeV. We therefore concluded the applicability of these glasses for radiation shielding and that the addition of La2O3 increases their radiation protection features.

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“…Cobalt ions may enter into the Oxy Fluoro Cobalt Glasses network with divalent (Co 2+ ) or trivalent (Co 3+ ) coordination which can be identified by coloration, and thick blue colour due to (Co 2+ ) ions. The colour of these glasses may also depend on the tetrahedral and octahedral occupancy of cobalt ions in the glass network [14]. The ordering of magnetic moments in cobalt oxide is similar to that of an antiferromagnetic material and CoO is highly stable, when added to these glasses, it improves the sintering behaviour of the glasses offering a wide range of applications in fields like supercapacitors, fuel cells and catalysis [15].…”

Section: Introductionmentioning

confidence: 99%

The physical, structural, elastic, optical and thermal studies on sesquioxides (Al₂O₃, Y₂O₃, Sb₂O₃) doped Oxy Fluoro Cobalt Borate Glasses

Rao¹,

Sudhakar²,

Chand

et al. 2023

Phys. Scr.

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Sesquioxides (Al2O3, Y2O3, Sb2O3) doped Oxy fluoro Cobalt borate novel luminescent series of glasses are prepared by melt quenching method. The structural characteristics of these glasses were studied by XRD, SEM and EDS techniques. The change in physical parameters such as density of all the series of glasses prepared gives a pathway for cobalt/Alumina/Antimony/Yttrium ions to enter in to borate glass network with the enhancement in the concentration of corresponding dopants. The depolymerization of the borate glass network is evident by the decline in various elastic parameters with B-O-Co/Y/Sb/Al bonds and by the modifier role of CoO/Y2O3/Sb2O3/Al2O3 transforming a fraction of tetrahedral BO3 units into BO4 units. Both FTIR and IR spectra indicate an increase in octahedral occupancy of cations Co2+, Y3+, Sb3+and Al3+ ions in the glass network with the increase of their concentration. The conversion rate of tetrahedral BO3 units to octahedral BO4 units leading to the formation of NBOs is more in Al3+ and least in Y3+ with the increase of concentration of sesquioxides at 0.05 mol% concentration of CoO. The optical absorption spectra of all series of glasses prepared reveal that octahedral occupancy of cobalt ions is dominant due to the ligand fields created by different sesquioxide ions in the glass network produce NBOs and number of electrons trapped at the donor centers. The PL spectra of all the series of these glasses reveal the octahedral occupancy of Co2+ ions, which is evident from the two emission transitions 2T1g(H) 4T1g(F) (531–556nm) and 2Eg5T2g (699–718nm).The prepared series of glasses show efficient luminescence of Cobalt ions, and Al2O3 series of glasses are better candidates for luminescence as their emission Cross-sections are highest when compared with the remaining series of glasses.

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Influence of La2O3 on the structural, mechanical and optical features of cobalt doped heavy metal borate glasses

Cited by 43 publications

References 56 publications

Enhancement of Gamma-ray Shielding Properties in Cobalt-Doped Heavy Metal Borate Glasses: The Role of Lanthanum Oxide Reinforcement

Enhancement of Gamma-ray Shielding Properties in Cobalt-Doped Heavy Metal Borate Glasses: The Role of Lanthanum Oxide Reinforcement

Effect of La2O3 Additive on the Radiation Shielding Properties of Cobalt-doped Borate Glasses

The physical, structural, elastic, optical and thermal studies on sesquioxides (Al₂O₃, Y₂O₃, Sb₂O₃) doped Oxy Fluoro Cobalt Borate Glasses

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Influence of La2O3 on the structural, mechanical and optical features of cobalt doped heavy metal borate glasses

Cited by 43 publications

References 56 publications

Enhancement of Gamma-ray Shielding Properties in Cobalt-Doped Heavy Metal Borate Glasses: The Role of Lanthanum Oxide Reinforcement

Enhancement of Gamma-ray Shielding Properties in Cobalt-Doped Heavy Metal Borate Glasses: The Role of Lanthanum Oxide Reinforcement

Effect of La2O3 Additive on the Radiation Shielding Properties of Cobalt-doped Borate Glasses

The physical, structural, elastic, optical and thermal studies on sesquioxides (Al2O3, Y2O3, Sb2O3) doped Oxy Fluoro Cobalt Borate Glasses

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The physical, structural, elastic, optical and thermal studies on sesquioxides (Al₂O₃, Y₂O₃, Sb₂O₃) doped Oxy Fluoro Cobalt Borate Glasses