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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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Lima, Maria Margarida Rolim Augusto
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2018Thermal characteristics and crystallization behavior of zinc borosilicate glasses containing Nb2O5citations
- 2016Formation and crystallization of zinc borosilicate glassescitations
- 2015Crystallization of lithium disilicate-based multicomponent glasses - effect of silica/lithia ratiocitations
- 2014Crystallization kinetics of a barium-zinc borosilicate glass by a non-isothermal methodcitations
- 2014Phase transformation and microstructural evolution after heat treatment of a terbium-doped lithium–aluminum phosphate glasscitations
- 2014Synthesis of Niobium Doped Zinc Borosilicate Glass-ceramics
- 2014Crystallization and microstructure of Eu3+-doped lithium aluminophosphate glasscitations
- 2014Glass transition and crystallization kinetics of a barium borosilicate glass by a non-isothermal methodcitations
- 2014A novel dental restorative glass-ceramic based on fluorcanasite
- 2013Rare-earth doped phosphate glasses
- 2013Crystallization kinetics terbium-doped aluminophosphate glass studied by DSC, XRD and SEM
- 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
- 2012Structural, electrical and thermal properties of borosilicate glass-alumina compositescitations
- 2008Mechanical characteristics of clay structural ceramics containing coal fly ashcitations
- 2004Recycling of coal fly ash by ceramic processing
- 2000Pressureless sintering of alumina-glass compositescitations
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booksection
Recycling of coal fly ash by ceramic processing
Abstract
Coal fly ash was used as raw material for the preparation of ceramic materials by aconventional powder technology route. Powder compacts were made from as-received fly ash,from calcined fly ash and from powder mixtures having 90% of calcined fly ash plus a low-costmineral as additive (dolomite, CaCO3.MgCO3). The compacts were sintered in air attemperatures between 900 and 1300ºC for 2h.The effects of the processing parameters on the densification, microstructural developmentand properties of the ceramic bodies were investigated. The unburned carbon present in theas-received fly ash inhibited densification due to gas formation during firing, resulting in anincreased porosity. A maximum density of ~2.6 g cm -3 was achieved at a sinteringtemperature 1050-1100ºC, either for compacts prepared from 100 % calcined fly ash or forcompacts containing 10 wt% dolomite. The addition of dolomite caused the formation of anincreased amount of anorthite and of liquid phase. The density, thermal expansion coefficientand the modulus of rupture of the densest fly ash-based ceramic materials are identical tothose exhibited by some traditional ceramics used in civil construction.The present results indicate a convenient way to treat coal fly ash, transforming it intouseful ceramic products via a simple and cost effective powder technology and sinteringroute.