Some effects of γ-irradiation in soda-lime silicate glasses

Kowal, T.M.; Krajczyk, L.; Macalik, B.; Nierzewski, K. D.; Okuno, Emico; Suszynska, M.; Szmida, M.; Yoshimura, Elisabeth Mateus

doi:10.1016/s0168-583x(99)00699-0

Cited by 12 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A new absorption band appears around 430 nm in the spectra of the exchanged samples (b and c). According to several authors [6,8], this absorption peak corresponds to the Surface-Plasmon Resonance (SPR) of the silver aggregates in glass. The formation of these aggregates is due to diffusion and agglomeration of neutral silver atoms in the glass matrix during gamma irradiation and/or heat treatment according to the reaction:…”

Section: Effect Of Gamma Irradiation and Heat Treatmentmentioning

confidence: 99%

“…The conventional synthesis of silver nanoparticles in ion-exchanged glass requires the action of reducing agents present in the glass and enhanced diffusivity which is achieved only by thermal treatment at temperature well above 450°C. By this procedure, only a few percent of the Ag + ions introduced are converted to silver atoms [8]. The improved formation process of silver nanoparticles by gamma irradiation is explained by the fact that the diffusion of silver in the glass increases by several orders of magnitude when the sample is irradiated by gamma rays before undergoing heat treatment.…”

Section: Tablementioning

confidence: 99%

“…We observe that the aggregates radius grew between 0.9 and 1.43 nm with increasing of annealing time from 10 to 242 min and then saturated. Kowal et al [8] suggest that the saturation of the absorption band for long annealing times may be due to the fact that all silver ions embedded in the samples have yet been reduced.…”

Section: Tablementioning

confidence: 99%

“…Combined with a heat treatment, the ion exchange technique has received an increase attention as it can be used to introduce metallic nanosize particles such silver, gold and copper into glass matrix [5][6][7]. Recently ionizing radiation such as gamma rays, electrons, heavy ions, X-ray or laser beam, has been used, with or instead of the heat treatment, to produce silver colloids after the ion exchange in glass [8][9][10][11]. Ionizing radiation produces in insulating materials electron hole pairs (excitons) which lead to the production of stable defects and changes of the valence state of doping and impurities ions in the glasses.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of gamma rays absorbed doses and heat treatment on the optical absorption spectra of silver ion-exchanged silicate glass

Farah

Hosni

Mejri

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

International audienceSamples of a commercial silicate glass have been subjected to ion exchange at 320 degrees C in a molten mixture of AgNO3 and NaNO3 with molar ratio of 1:99 and 5:95 for 60 min. The ion exchange process was followed by gamma irradiation in the dose range of 1-250 kGy and heating at the temperature of 550 degrees C for different time periods ranging from 10 to 582 min. The spectral absorption in UV Vis range of the Ag-Na ion exchanged glass was measured and used to determine the states of silver prevailing in the glass during the ion exchange, the gamma irradiation and the heat treatment. The gamma irradiation induced holes and electrons in the glass structure leading to the creation of a brown colour, and silver ions trapped electrons to form silver atoms. We observed the first stage of aggregation after irradiation, as well as after heating. The silver atoms diffused and then aggregated to form nanoclusters after heating at 550 degrees C. A characteristic band at about 430 nm was induced. The surface Plasmon absorption of silver nanoclusters in the glass indicated that the nanoclusters radius grew between 0.9 and 1.43 nm with increasing of annealing time from 10 to 242 min and then saturated. We also found that the size of aggregates depends on the value of gamma radiation absorbed dose. Contrary to what was expected, we found that 20 kGy is the optimal absorbed dose corresponding to the larger size of the aggregates which decreases for absorbed doses above 20 kGy. (C) 2014 Elsevier B.V. All rights reserved

show abstract

Section: Effect Of Gamma Irradiation and Heat Treatmentmentioning

confidence: 99%

Section: Tablementioning

confidence: 99%

Section: Tablementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of gamma rays absorbed doses and heat treatment on the optical absorption spectra of silver ion-exchanged silicate glass

Farah

Hosni

Mejri

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

show abstract

Synthesis and Control of Silver Aggregates in Ion-Exchanged Silicate Glass by Thermal Annealing and Gamma Irradiation

Farah

Hosni²,

Hamzaoui

2019

Applications of Ion Exchange Materials in Chemical and Food Industries

View full text Add to dashboard Cite

Effect of radiation bleaching in sodium-silicate glasses

2006

View full text Add to dashboard Cite

Radiation defects in the lattice of sodium-silicate glass that arise under the effect of g-radiation were investigated by optical spectroscopy. Color centers of the hole type appeared in the glass at radiation doses in the 10 2 -10 3 Gy region.Sodium-silicate glass is widely used in optics, industry, as bioactive additives in medicine, ornaments, etc. [1 -3]. Addition of alloying dopants (Fe, Ti) [4] and exposure to high-energy radiation (x-ray, g radiation) [2] are used for effectively altering the optical properties of glass. A detailed study of the mechanisms of formation of the radiation defects that arise after irradiation and alter the optical properties due to the appearance of electron and hole color centers in the glass will allow using these materials as radiation-resistant coatings, structures, and seals [5]. For this reason, we investigated the effect of g radiation on the optical properties and radiation resistance of multicomponent sodium-silicate glass in the visible and ultraviolet regions of the spectrum. The trace element composition of the samples was (%): 0.0080 Pb, 0.0005 Cd, < 0.0020 Ni, < 0.0020 Co, 0.0006 Cu, 0.016 Zn, < 0.0020 Cr, 0.0002 Li, 0.0004 Rb, 0.0007 Cs, 0.0050 Sr. The chemical composition was (%): 73.80 SiO 2 , 0.18 TiO 2 , 1.90 Al 2 O 3 , 0.88 Fe 2 O 3 , 4.87 CaO, 3.93 MgO, 12.65 Na 2 O, 0.72 K 2 O, 0.03 P 2 O 5 , 0.04 MnO.In irradiation of the glass with a g-quanta beam of comparatively low energy (E g £ 10 MeV), Compton scattering plays the predominant role, and the other effects comprise only a few percent [6]. The multicomponent sodium-silicate glasses investigated were irradiated with g-quanta from a 60 Co source with energy of 1.25 MeV and rate of 1.3 Gy/min in the dose range of D = 10 2 -10 3 Gy.We know that the absorption spectrum of oxide glasses of the Na 2 O -CaO -MgO -SiO 2 system can be described as the sum of the absorption bands of: L sites (edge of the UV region), Fe 3+ (UV and visible regions), Fe 2+ (UV, visible, and IR regions), OH -(IR region).In studying the absorption spectra of unirradiated samples in the visible and UV regions (Fig. 1), two absorption bands in the 385 and 365 nm region were found. The first band was induced by Fe 3+ iron ions, which was confirmed by the published data [7,8], and the second was due to so-called L sites, which bind with structural fragments [4,9,10].The modifier ions in the glass lattice compensate for the negative charges on nonbridge oxygen ions [4]. L sites are excited during irradiation, and the oxygen ion in the O -state absorbs a g quantum and passes into the O 0 state with formation of L + sites:The presence of Na 2 O in the glass lattice shift the band of the radiation-induced absorption caused by excitation of O -states and conversion to O 0 from 620 nm (2 eV) to 465 nm (2.7 eV) [4]. As a consequence, the increase in absorption in the 450 -530 nm region to D = 1.3´10 2 Gy (see Fig. 1) and the subsequent decrease to saturation are due to nonbridge oxygen ions. and Resource Management, Far East Branch, Russian Acade...

show abstract

Some effects of γ-irradiation in soda-lime silicate glasses

Cited by 12 publications

References 8 publications

Effect of gamma rays absorbed doses and heat treatment on the optical absorption spectra of silver ion-exchanged silicate glass

Effect of gamma rays absorbed doses and heat treatment on the optical absorption spectra of silver ion-exchanged silicate glass

Synthesis and Control of Silver Aggregates in Ion-Exchanged Silicate Glass by Thermal Annealing and Gamma Irradiation

Effect of radiation bleaching in sodium-silicate glasses

Contact Info

Product

Resources

About