Effect of Gamma Irradiation on Structural and Optical Investigations of Borosilicate Glass Doped Yttrium Oxide

Fayad, A. M.; Abd-Allah, W. M.; Moustafa, F. A.

doi:10.1007/s12633-016-9533-6

Cited by 31 publications

(22 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simon et al investigated iron-doped yttrium aluminosilicate glasses via XPS analysis and reported that Y 2 O 3 played the role of network modifier oxide in the silicate glass network [34]. Fayad et al also studied borosilicate glasses doped with Y 2 O 3 and stated that Y 2 O 3 preferred to act as a network modifier than network former especially at concentrations above 1 wt% [35].…”

Section: Introductionmentioning

confidence: 99%

Yttrium doped phosphate-based glasses: structural and degradation analyses

et al. 2020

View full text Add to dashboard Cite

This study investigates the role of yttrium in phosphate-based glasses in the system 45(P2O5)–25(CaO)– (30-x)(Na2O)–x(Y2O3) (0≤x≤5) prepared via melt quenching and focuses on their structural characterisation and degradation properties. The structural analyses were performed using a combination of solid-state nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). 31P NMR analysis showed that depolymerisation of the phosphate network occurred which increased with Y2O3 content as metaphosphate units (Q2) decreased with subsequent increase in pyrophosphate species (Q1). The NMR results correlated well with structural changes observed via FTIR and XPS analyses. XRD analysis of crystallised glass samples revealed the presence of calcium pyrophosphate (Ca2P2O7) and sodium metaphosphate (NaPO3) phases for all the glass formulations explored. Yttrium-containing phases were found for the formulations containing 3 and 5 mol% Y2O3. Degradation analyses performed in Phosphate buffer saline (PBS) and Milli-Q water revealed significantly reduced rates with addition of Y2O3 content. This decrease was attributed to the formation of Y-O-P bonds where the octahedral structure of yttrium (YO6) cross-linked phosphate chains, subsequently leading to an increase in chemical durability of the glasses. The ion release studies also showed good correlation with the degradation profiles.

show abstract

Section: Introductionmentioning

confidence: 99%

Yttrium doped phosphate-based glasses: structural and degradation analyses

et al. 2020

View full text Add to dashboard Cite

show abstract

“…This behavior can be explained as Ti has a lower atomic number (22) than Zn (33). This behavior indicates that it is further needed to increase the titanate in the glasses.…”

Section: Photon Shielding Featuresmentioning

confidence: 98%

“…Their shielding capacity becomes less efficient when energy increases. Besides, Ti has a lower atomic number (22) than…”

Section: Photon Shielding Featuresmentioning

confidence: 99%

Structural and radiation shielding simulation of B2O3–SiO2–LiF–ZnO–TiO2 glasses

Mahmoud

Elsayed

Wahab

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Quaternary glasses with a 59B2O3-29SiO2-2LiF-(10 − ) ZnO-TiO2 composition using the melt-quench techniques were prepared. XRD examined the nature of prepared glasses. The FT-IR spectra was studied for the changes in the structure of these glasses. While the density is increased, the molar volume of the glass system is reduced. The velocities and elastic modulus of these glasses were experimentally and theoretically based on the Makishima-Mackenzie model evaluated. Besides, for the studied glasses, the radiation shielding efficiency was investigated by Phy-X/PSD and XCOM software. These glasses were found to have an abnormal attenuation, structural, and density relationship. The mass attenuation coefficient (μ/ρ), linear attenuation coefficient (LAC), half-value layer (HVL), tenth value layer (TVL), and effective atomic number (Zeff), of glasses, have been designed to simulate for gamma photon energies between 0.015 and 15 MeV. MAC values calculated using Phy-X/PSD and XCOM were compared and was observed in good agreement with the other.

show abstract

“…In another study Mackey et al [260] reported optical absorption bands for high-purity SiO2-Na2O glass irradiated with X-rays, in the range 600-730 nm and these were attributed to Ecentres. Fayad et al [68] reported optical absorption bands between 500 and 600 nm in gamma-irradiated borosilicate glasses which they attributed to BOHC's and similarly absorption bands fitted to spectra for the NaBaBSi glasses in Figure 5.30 at 527 nm and 568 nm can also be attributed to BOHC's or hole trapped centres [261]. Jiang et al [262] and Mackey et al [263] have reported absorption bands due to Na + ions or electrons trapped at alkali ions and, based on their results, we can attribute the absorption bands present at 319 and 324 nm to trapped electrons of alkali or Na + ions (plasmon band); furthermore bands at 249 and 253 nm may be due to Fe trace impurities [65,242,261].…”

Section: Glass Colorationmentioning

confidence: 93%

“…Fayad et al [68] reported optical absorption bands between 500 and 600 nm in gamma-irradiated borosilicate glasses which they attributed to BOHC's and similarly absorption bands fitted to spectra for the NaBaBSi glasses in Figure 5.30 at 527 nm and 568 nm can also be attributed to BOHC's or hole trapped centres [261]. Jiang et al [262] and Mackey et al [263] have reported absorption bands due to Na + ions or electrons trapped at alkali ions and, based on their results, we can attribute the absorption bands present at 319 and 324 nm to trapped electrons of alkali or Na + ions (plasmon band); furthermore bands at 249 and 253 nm may be due to Fe trace impurities [65,242,261]. An optical absorption band at 568 nm for LiNaBSi glass irradiated with 0.5 MGy can be attributed to a combination of BOHC's and POR's and a band at 622 nm for the sample irradiated with 5 MGy is also attributed to BOHC's [261,264].…”

Section: Glass Colorationmentioning

confidence: 93%

Radiation damage effects on the structure and properties of radioactive waste glasses

Rautiyal¹

View full text Add to dashboard Cite

The performance assessment of glass matrices currently being used in different nuclear energy producing countries to contain and immobilise high-level waste (HLW) waste is crucial for safe and economic disposal. During the first ~500 years of geological disposal fission products will me the main source or radiation and they decay by beta-gamma emission. We studied different borosilicate glasses used in different countries to immobilise HLW, such as Indian glass (NaBaBSi), UK glasses (LiNaBSi), also called MW- Mixture Windscale, UK-CaZn a modified version of MW, French glass (SON68) and a glass proposed by six collaborating nations, called the International Simple Glass (ISG), to see whether / how irradiation defects are dependent on glass composition. Glasses were externally irradiated using a 60Co gamma source to study the effects of beta-gamma radiation (a gamma emitter loses it energy to atomic electrons they then further interact via coulombic interactions); and by He2+ ion implantation to study the effects of alpha particles. A multi-spectroscopic approach was used to characterise glass specimens before and after irradiation. NaBaBSi and LiNaBSi glasses were irradiated using 60Co gamma photons and we found boron-oxygen hole centres (BOHC), electrons trapped at alkali cations or ET centres and peroxy-radicals (PORs) as common defect in these glasses. In addition, E- or polaron centres which may be related to formation of elemental / metallic sodium colloids formed in NaBaBSi glass. Time-dependent thermal annealing of the irradiated glasses revealed that POR’s are the most thermally stable of the defect centres. BOHC and ET centres were common to SON68, ISG and CaZn glasses. In NaBaBSi, LiNaBSi and SON68 glasses loaded with non-active simulated HLW no sharp and intense signals indicative of radiation-induced paramagnetic defect centres was observed. In the study of NaBaBSi and LiNaBSi glasses doped with 0.19. 0.99, and 4.76 mol% Fe2O3 prepared in an oxidising melting environment, electron paramagnetic resonance (EPR) spectroscopy showed that gamma irradiation induced sharp and intense signals exist for only the 0 and 0.19 mol% Fe2O3 doped samples and disappeared for samples containing higher molar concentrations of Fe2O3. It is postulated that, upon gamma irradiation, in LiNaBSi glass Fe2+ is oxidised to Fe3+ by the capture of holes, whereas in NaBaBSi glass Fe3+ is reduced to Fe2+ due to capture of electrons. Further research is needed to understand the reasons behind these different behaviours.

show abstract

Effect of Gamma Irradiation on Structural and Optical Investigations of Borosilicate Glass Doped Yttrium Oxide

Cited by 31 publications

References 33 publications

Yttrium doped phosphate-based glasses: structural and degradation analyses

Yttrium doped phosphate-based glasses: structural and degradation analyses

Structural and radiation shielding simulation of B2O3–SiO2–LiF–ZnO–TiO2 glasses

Radiation damage effects on the structure and properties of radioactive waste glasses

Contact Info

Product

Resources

About