| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Brauer, Delia S.
Friedrich Schiller University Jena
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Dispersion, ionic bonding and vibrational shifts in phospho-aluminosilicate glasses †
- 2024Dispersion, ionic bonding and vibrational shifts in phospho-aluminosilicate glasses
- 2024Dispersion, ionic bonding and vibrational shifts in phospho-aluminosilicate glasses
- 2024Tailoring the Mechanical Properties of Metaluminous Aluminosilicate Glasses by Phosphate Incorporation
- 2024Phosphate/Silicate Ratio Allows for Fine-Tuning of Bioactive Glass Crystallisation and Glass-Ceramic Microstructure
- 2024Phosphate/Silicate Ratio Allows for Fine-Tuning of Bioactive Glass Crystallisation and Glass-Ceramic Microstructure
- 2023Surface Crystallization of Barium Fresnoite Glass: Annealing Atmosphere, Crystal Morphology and Orientationcitations
- 2023Surface Crystallization of Barium Fresnoite Glass: Annealing Atmosphere, Crystal Morphology and Orientationcitations
- 2023Surface crystallization of barium fresnoite glass : annealing atmosphere, crystal morphology and orientationcitations
- 2021Crystallization study of sol–gel derived 13-93 bioactive glass powdercitations
- 2021Nano-imaging confirms improved apatite precipitation for high phosphate/silicate ratio bioactive glasses
- 2021Nano-imaging confirms improved apatite precipitation for high phosphate/silicate ratio bioactive glassescitations
- 2021Nano-imaging confirms improved apatite precipitation for high phosphate/silicate ratio bioactive glasses
- 2020New insights into the crystallization process of sol‐gel–derived 45S5 bioactive glasscitations
- 2020New insights into the crystallization process of sol‐gel–derived 45S5 bioactive glasscitations
- 2020Tailoring the mechanical properties of metaluminous aluminosilicate glasses by phosphate incorporationcitations
- 2020Mg or Zn for Ca substitution improves the sintering of bioglass 45S5citations
- 2020Influence of vanadium on optical and mechanical properties of aluminosilicate glassescitations
- 2020Calorimetric approach to assess the apatite-forming capacity of bioactive glassescitations
- 201831P NMR characterisation of phosphate fragments during dissolution of calcium sodium phosphate glassescitations
- 2016Controlling the ion release from mixed alkali bioactive glasses by varying modifier ionic radii and molar volumecitations
- 2016Bioglass and bioactive glasses and their impact on healthcarecitations
- 2015Influence of zinc and magnesium substitution on ion release from Bioglass 45S5 at physiological and acidic pHcitations
Places of action
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article
Influence of vanadium on optical and mechanical properties of aluminosilicate glasses
Abstract
V2O5 was introduced up to 9 wt.% in a peralkaline alkaline earth aluminosilicate glass and up to 4.8 wt.% in two sodo aluminosilicate glasses, respectively, a peralkaline and a peraluminous one. This introduction had a strong effect on thermal properties, and in particular, on glass transition and crystallization temperatures of the peraluminous glass, which dropped by 89 K, while a moderate drop of ~20 K was observed for the two other glasses. Still, the glass stability and the glass-forming ability stayed almost unmodified. The elastic properties measured by Brillouin spectroscopy show a decrease with added Vanadium for the depolymerized alkali earth aluminosilicate and the peraluminous sodo aluminosilicate. In contrast, the elastic properties remained unchanged for the peralkaline composition. Using optical absorption, the proportion of V5+, which is largely dominant, was found to follow the trend predicted using optical basicity considerations. A large photoluminescence emission, centered at ~560 nm, was found for all glasses, upon excitation in the UV edge at both ~280 and ~350 nm. The emission band positions were relatively insensitive to the glass composition, whereas their intensities show variations of one order of magnitude between the sodium peralkaline composition and the calcium depolymerized glass. A too-high concentration of V2O5 shows a quenching effect on the emission. Polarized and cross-polarized Raman spectroscopy allowed us to identify the different environments around the V5+O4 tetrahedra. The highly polarizable V5+O4 tetrahedra associated with two non-bridging oxygens, vibrating at 860 cm−1, is proposed to be responsible for the more efficient charge transfer. At the opposite end, the formation of VO4-AlO4 units is proposed to quench luminescence properties. Furthermore, we observed that, upon thermal treatment, the optical properties of the glasses are significantly modified without observable structural modifications or evolution of the elastic properties.