Photosensitivity of SiO2–Al and SiO2–Na glasses under ArF (193nm) laser

Trukhin, A.N.; Teteris, J.; Fedotov, A. Yu.; Griscom, D. L.; Buscarino, Gianpiero

doi:10.1016/j.jnoncrysol.2008.11.037

Cited by 28 publications

(51 citation statements)

References 31 publications

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“…The UV bands in all these last samples are fast. It is about 4.5 ns for silica glass under pulses of ArF laser [22] and 1.3 ns for γ-irradiated α-quartz under pulses of synchrotron [9][10][11]. A similar UV band could be induced in pure non-irradiated α-quartz crystal with a dense electron beam at temperatures below 80 K [12].…”

Section: Figurementioning

confidence: 87%

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Luminescence of silicon Dioxide — silica glass, α-quartz and stishovite

Trukhin¹,

Šmits

Chikvaidze

et al. 2011

Open Physics

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Abstract:This paper compares the luminescence of different modifications of silicon dioxide -silica glass, α-quartz crystal and dense octahedron structured stishovite crystal. Under x-ray irradiation of pure silica glass and pure α-quartz crystal, only the luminescence of self-trapped exciton (STE) is detected, excitable only in the range of intrinsic absorption. No STE luminescence was detected in stishovite since, even though its luminescence is excitable below the optical gap, it could not be ascribed to a self-trapped exciton. Under ArF laser excitation of pure α-quartz crystal, luminescence of a self-trapped exciton was detected under two-photon excitation. In silica glass and stishovite mono crystal, we spectrally detected mutually similar luminescences under single-photon excitation of ArF laser. In silica glass, the luminescence of an oxygen deficient center is presented by the so-called twofold coordinated silicon center (L.N. Skuja et al., Solid State Commun. 50, 1069(1984). This center is modified with an unknown surrounding or localized states of silica glass (A.N. Trukhin et al., J. Non-Cryst. Solids 248, 40 (1999)). In stishovite, that same luminescence was ascribed to some defect existing after crystal growth. For α-quartz crystal, similar to silica and stishovite, luminescence could be obtained only by irradiation with a lattice damaging source such as a dense electron beam at a temperature below 80 K, as well as by neutron or γ-irradiation at 290 K. In spite of a similarity in the luminescence of these three materials (silica glass, stishovite mono crystal and irradiated α-quartz crystal), there are differences that can be explained by the specific characteristics of these materials. In particular, the nature of luminescence excited in the transparency range of stishovite is ascribed to a defect existing in the crystal after-growth. A similarity between stishovite luminescence and that of oxygen-deficient silica glass and radiation induced luminescence of α-quartz crystal presumes a similar nature of the centers in those materials.

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Section: Figurementioning

confidence: 87%

“…Details of stishovite luminescence are described below. The blue band of oxygen deficient silica glass possesses complicated decay kinetics [22,23]. It undergoes exponential decay with a time constant of 10.3 ms at 290 K, a shorter non-exponential decay, and an intensity growth with cooling [23].…”

Section: Figurementioning

confidence: 99%

Luminescence of silicon Dioxide — silica glass, α-quartz and stishovite

Trukhin¹,

Šmits

Chikvaidze

et al. 2011

Open Physics

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“…Chassin et al (1986) stated that the dispersive forces originate from the surface oxygen groups of the silica tetrahedral, whereas polar forces derive from the exchangeable cations. The high polar forces of glass slide result from its non-regular SiO 2 structure and the Na + /Al 3+ addition, which was used for increasing the toughness and the photosensitivity (Trukhin et al 2009). Montmorillonite is assumed to be characterized by high polar forces which result from its high amount of exchangeable cations (CEC = 103.6 meq/100 g).…”

Section: Surface Energymentioning

confidence: 99%

A Mineralogical Approach of the Interactions Between Bitumen, Clay and Water in Hot Mix Asphalt (HMA)

Chen

Gaudefroy²,

Duc

et al. 2015

RILEM Bookseries

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Clay fines are known to reduce the water resistance of bitumen-aggregates binding and cause stripping in Asphalt Concrete (AC) mixtures. To address this phenomenon, a better understanding of the mineralogical composition of aggregates is needed as well as an assessment of the bitumen-clay-water interactions. This paper contributes to reach this goal from a mineralogical perspective. The most common clays in natural aggregates, kaolinite, illite and montmorillonite, were used to prepare thin clay films and artificial clay-rich aggregates. The bitumen-clay interaction was studied using the sessile drop and the Oliensis spot tests on those thin clay films, whereas Duriez tests allowed measuring the stripping potential of AC mixtures containing the clay-rich aggregates. The results show that the water-bitumen-clay interaction and water resistance of the AC mixture are specific to the clay mineralogy. Furthermore, they show that the bitumen-clay interaction may be captured upon determining the surface energy of bitumen, the chemical composition and pH value of the clay and the bitumen-clay compatibility. Hence, predicting the water resistance of clay rich AC mixtures from mineralogical properties of the bitumen-clay interaction seems feasible.

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“…Localized states in silica glass are interpreted through the luminescence of so-called modified oxygen deficient centers [3] -in contrast with the twofold-coordinated silicon centers, which are point defects in neutron-irradiated stoichiometric silica [4] and also in as-received pure non-stoichiometric silica glass [5]. The behaviors of these states in silica have also been extensively studied in samples with different levels of oxygen deficiency [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…By means of adding of extra silicon before fusion it has proved possible to increase the concentrations of oxygen deficient centers (ODCs) and reveal the properties of localized states associated with them [6,7]. Based on previous work [8], it is known that the optical absorption bands of aluminum-oxide localized states in silica containing alkali ions are situated above the optical gap of the host material (8.2 eV [9]), whereas aluminum impurities in silica not accompanied with alkali ions give rise to localized states in photon energy range below optical gap pure of silica [3].…”

Section: Introductionmentioning

confidence: 99%