| 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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Selle, Susanne
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Ni‐Alloyed Copper Iodide Thin Films: Microstructural Features and Functional Performancecitations
- 2023Viscous Sintering of Acid Leached Glass Powderscitations
- 2023Viscous Sintering of Acid Leached Glass Powders
- 2023Ultrawide bandgap willemite-type Zn<sub>2</sub>GeO<sub>4</sub> epitaxial thin filmscitations
- 2023Oxygen‐Induced Phase Separation in Sputtered Cu–Sn–I–O Thin Filmscitations
- 2022Epitaxial lift-off of single crystalline CuI thin filmscitations
- 2022Epitaxial lift-off of single crystalline CuI thin filmscitations
- 2022Suppression of Rotational Domains of CuI Employing Sodium Halide Buffer Layerscitations
- 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
- 2021Plastic strain relaxation and alloy instability in epitaxial corundum-phase (Al,Ga)2O3 thin films on r-plane Al2O3citations
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article
Viscous Sintering of Acid Leached Glass Powders
Abstract
The process of viscous flow sintering is a phenomenon that is closely linked to the surface properties of the glass particles. In this work, we studied the extreme case of acid-leaching of soda-lime-silicate glass beads of two different particle size distributions and its effects on non-isothermal viscous sintering of powder compacts. Depth profiling of the chemical composition after leaching revealed a near-surface layer depleted in alkali and alkaline earth ions, associated with concurrent hydration as mass loss was detected by thermogravimetry. Heating microscopy showed that acid treatment of glasses shifted the sinter curves to higher temperatures with increasing leaching time. Modelling of the shrinkage with the cluster model predicted a higher viscosity of the altered surface layer, while analysis of the time scales of mass transport of mobile species (Na+, Ca2+ and H2O) during isochronous sintering revealed that diffusion of Na+ can compensate for concentration gradients before sintering begins. Also, exchanged water species can diffuse out of the altered layer, but the depletion of Ca2+ in the altered surface layer persists during the sinter interval, resulting in a glass with higher viscosity, which causes sintering to slow down.