| 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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Veiga, João Pedro
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2020Testing the feasibility of titanium dioxide sol-gel coatings on portuguese glazed tiles to prevent biological colonizationcitations
- 2018Thermal characteristics and crystallization behavior of zinc borosilicate glasses containing Nb2O5citations
- 2017An experimental approach for smelting tin ores from Northwestern Iberiacitations
- 2016Formation and crystallization of zinc borosilicate glassescitations
- 2014Synthesis of Niobium Doped Zinc Borosilicate Glass-ceramics
- 2013Rare-earth doped phosphate glasses
- 2013Optical and structural characterization of samarium and europium-doped phosphate glassescitations
- 2013Effect of Phosphogypsum on the Clinkerization Temperature of Portland Cement Clinkercitations
- 2012Sintering,Crystallization and Dielectric Behavior of Barium Zinc Borosilicate Glasses - Effect of Barium Oxide substitution for Zinc Oxidecitations
- 2012Degradation of dental ZrO2-based materials after hydrothermal fatigue. Part I: XRD, XRF, and FESEM analysescitations
- 2010Characteristics Of The Blast Furnace Dust In Accordance With The Conditions Imposed By The Valorisation Solution
- 2010Artificial Aging of Zr-based Dental Materials - A Pilot Study
Places of action
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article
Formation and crystallization of zinc borosilicate glasses
Abstract
<p>Different glasses based on the ZnO-B<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> system, with a ZnO content ≥ 60 mol% and a fixed SiO<sub>2</sub> content (20 mol%), were synthesised using a melt-quenching method. Glass samples with zinc oxide concentrations as high as 65 mol% were prepared successfully without deteriorating the glass-forming ability. The glass samples were submitted to controlled heat-treatments, and the effect of the ZnO/B<sub>2</sub>O<sub>3</sub> molar ratio on the formation of crystalline phases within the glass matrix was investigated by means of differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). DTA results indicated that the glass transition and the onset crystallization temperatures of the studied glasses tended to increase with the increment on the ZnO/B<sub>2</sub>O<sub>3</sub> ratio. XRD data showed that the zinc binary crystalline phases, willemite (Zn<sub>2</sub>SiO<sub>4</sub>), a zinc orthosilicate, and zinc borate (Zn<sub>3</sub>B<sub>2</sub>O<sub>6</sub>) could be present in the crystallized glasses, depending on the heat-treatment conditions. The formation of willemite was promoted by an increasing ZnO/B<sub>2</sub>O<sub>3</sub> ratio. Microstructural observations performed by SEM indicated that under controlled experimental parameters (glass composition, heat-treatment temperature and time) the precipitation of nanocrystals within the glass matrix can be achieved, resulting in transparent and translucent willemite glass-ceramics.</p>