| 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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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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article
Crystallization kinetics of a barium-zinc borosilicate glass by a non-isothermal method
Abstract
The crystallization kinetics of a glass with a molar composition 40BaO-20ZnO-30B2O3-10SiO2 was investigated.The kinetic parameters, activation energy for crystallization (Ec) and Avrami exponent (n), wereevaluated under non-isothermal conditions using the results obtained by differential thermal analysis(DTA) performed at different heating rates. DTA curves exhibited two overlapping exothermic peaks associatedwith the crystallization of the glass. Barium borate (BaB4O7) was the first crystalline phase to beformed and it was followed by the formation of barium zinc silicate (BaZnSiO4), as identified by XRD.For the first exothermic peak, when the fraction of crystallization (v) increased from 0.1 to 0.9, the localactivation energy (Ec(v)) decreased from 700 to 500 kJ/mol, while for the second exothermic peak, Ec(v)slightly increased from 490 to 570 kJ/mol. For the range of 0.1 < v < 0.9, the local Avrami exponent (n(v))increased from 1 to 1.4 for the first exothermic peak and it decreased from 1.7 to 1.4 for the secondexothermic peak. Observation by SEM of the microstructure of sintered glass samples revealed that crystallizationstarted at the surface of glass particles, with growth of lamellar crystallites, that together withsome quasi-spherical nano-sized crystallites progressed towards the inside of the glass at the highestsintering temperatures. The change of the local activation energy with the fraction of crystallizationsuggested that a multi-step kinetic reaction took place during sintering and crystallization of the glass.