| 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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Deubener, Joachim
Clausthal University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024Optical Real-Time Castability Evaluation for High-Throughput Glass Melting
- 2024Non-monotonic dependence of high-temperature stability of stone wool fibres on pre-oxidation time and temperaturecitations
- 2023Viscous Sintering of Acid Leached Glass Powderscitations
- 2023Viscous Sintering of Acid Leached Glass Powders
- 2023Oxidation and coordination states assumed by transition metal dopants in an invert ultrabasic silicate glasscitations
- 2022Determination of cooling rates of glasses over four orders of magnitudecitations
- 2021Re-use potential of carbon fibre fabric recovered from infusible thermoplastic CFRPs in 2nd generation thermosetting-matrix compositescitations
- 2021Reducing the raw material usage for room temperature infusible and polymerisable thermoplastic CFRPs through reuse of recycled waste matrix materialcitations
- 2021A threshold heating rate for single-stage heat treatments in glass-ceramics containing seed formerscitations
- 2021Spray-dried sol-gel glass-ceramic powders based on the tunable thermal expansion of quartz and keatite solid solutionscitations
- 2020Water in Alkali Aluminosilicate Glassescitations
- 2020Spray-dried TiO2(B)-containing photocatalytic glass-ceramic nanobeadscitations
- 2020Inversion of quartz solid solutions at cryogenic temperaturescitations
- 2020Effect of TiO2 and 11 minor elements on the reactivity of ground‐granulated blast‐furnace slag in blended cementscitations
- 2020Automated analysis of slow crack growth in hydrous soda-lime silicate glassescitations
- 2018Kinetics of Decelerated Meltingcitations
- 2016The TTT Curves of the Heterogeneous and Homogeneous Crystallization of Lithium Disilicate - A Stochastic Approach to Crystal Nucleationcitations
- 2016Bulk elastic properties, hardness and fatigue of calcium aluminosilicate glasses in the intermediate-silica rangecitations
- 2014Influence of thermal history on micro-mechanical properties of earth-alkaline aluminosilicate glasses
- 2014Irreversibility of pressure induced boron speciation change in glass
- 2013Environmental effects on fatigue of alkaline earth aluminosilicate glass with varying fictive temperaturecitations
- 2011Towards ultrastrong glassescitations
- 2010Impact of cationic diffusion on properties of iron-bearing glass fibres
- 2009Inward Cationic Diffusion and Formation of Silica-Rich Surface Nanolayer of Glasscitations
- 2008Modification of the glass surface induced by redox reactions and internal diffusion processes
- 2004Relaxation of Anisotropic Glasses
Places of action
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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.