Prediction of optical properties of commercial soda–lime-silicate glasses containing iron

Uchino, Takashi; Nakaguchi, Kunio; Nagashima, Yukihito; Kondo, Tetsufumi

doi:10.1016/s0022-3093(99)00617-1

Cited by 33 publications

(36 citation statements)

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“…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:…”

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confidence: 83%

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Effect of radiation bleaching in sodium-silicate glasses

2006

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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...

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Effect of radiation bleaching in sodium-silicate glasses

2006

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“…(1)(2)(3). The boundary condition at the bottom of the glassmelt in contact with the crucible located at x = 0 can be written as…”

Section: (2) Governing Equations and Boundary Conditionsmentioning

confidence: 99%

“…For example, clear and tinted glasses are used for building windows while so-called "solar control glass" is used for automotive windows. 1 The latter, characterized by a light green tint, contains relatively large iron content around 1.0 wt% to absorb harmful ultraviolet (UV) and infrared solar radiation. In addition, clear soda-lime silicate glasses, featuring very low iron content and high transmittance, have been used as substrate in solar cells.…”

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Conductive and Radiative Properties of Soda‐Lime Silicate Glassmelts with Different Iron Contents from 1100°C to 1500°C

et al. 2016

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This paper presents an inverse method for retrieving (i) the true thermal conductivity, and (ii) the two-band absorption coefficient of soda-lime silicate glassmelts between 1100°C and 1550°C from measured steady-state temperature profiles. This was achieved by combining (i) a forward method solving combined conductive and radiative heat transfer accounting for temperature-dependent thermal conductivity and spectral absorption coefficient and (ii) an inverse method based on genetic algorithm (GA) optimization. Four glassmelt compositions from ultraclear to gray glasses with iron content ranging from 0.008 to 1.1 wt% were investigated. First, it was established that the steady-state temperature in glassmelt can be predicted accurately by averaging the spectral absorption coefficient over two bands from 0 to 2.8 lm and 2.8 to 5.0 lm. The inverse method showed that the true thermal conductivity was independent of the iron content and given by k c (T) = 1.31 + 5.90 3 10 -4T, where T is given in°C. In addition, the band absorption coefficient between 0 and 2.8 lm strongly increased with increasing iron content, while the band absorption coefficient between 2.8-5.0 lm was independent of iron content.

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“…For example, so-called solar control glass is a type of SLS glass containing around 1 wt.% of iron, which is used in automotive windows [5]. Iron is added to absorb ultraviolet (UV) and infrared * corresponding author; e-mail: baktas@harran.edu.tr (IR) solar radiation to reduce the harmful effects of UV rays and vehicle thermal load, to increase passenger comfort [6].…”

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confidence: 99%

Mechanical Properties of Soda-Lime-Silica Glasses with Variable Peanut Shell Contents

et al. 2017

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In this study, the mechanical properties of soda-lime-silica glasses were investigated by using micro-Vickers indentation tests, while varying the amount of peanut shell powder added to the glass. Peanut shell powder was obtained by grinding peanut shells. It was added as a dopant to glass at 0.5-5 wt.%, with the final glass samples being produced by melting. Peanut shell addition had led to a decreased density of the soda-lime-silica glasses, and X-ray diffraction data of the peanut shell-doped soda-lime-silica glasses indicated the presence of two crystalline phases, namely, anorthite (Na0.45(Ca0.55Al1.55Si2.45O8) and magnesium aluminum silicate (MgAl2Si3O10)6. The Young's modulus values of the soda-lime-silica glasses increased along with the amount of peanut shell powder added. Peanut shell addition to the soda-lime-silica glasses has also caused increased hardness. Fracture toughness values of these glass samples were in the range of 0.91-1.04 MPa m 1/2 . Thus, the mechanical properties (e.g. E and KC) of soda-lime-silica glasses could be enhanced through peanut shell addition.

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Prediction of optical properties of commercial soda–lime-silicate glasses containing iron

Cited by 33 publications

References 4 publications

Effect of radiation bleaching in sodium-silicate glasses

Effect of radiation bleaching in sodium-silicate glasses

Conductive and Radiative Properties of Soda‐Lime Silicate Glassmelts with Different Iron Contents from 1100°C to 1500°C

Mechanical Properties of Soda-Lime-Silica Glasses with Variable Peanut Shell Contents

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