| 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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Petersen, Rasmus Rosenlund
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2021The foaming mechanism of glass foams prepared from the mixture of Mn 3 O 4 , carbon and CRT panel glasscitations
- 2021The foaming mechanism of glass foams prepared from the mixture of Mn3O4, carbon and CRT panel glasscitations
- 2021Application of foaming agent-oxidizing agent couples to foamed-glass formationcitations
- 2019Comparison of open- and closed-porous foamed glass
- 2018Suppressing the effect of cullet composition on the formation and properties of foamed glasscitations
- 2018Effect of alkali phosphate content on foaming of CRT panel glass using Mn3O4 and carbon as foaming agentscitations
- 2018Mechanism of Foaming Light-Weight Glass Foams (Invited talk)
- 2017Influence of foaming agents on solid thermal conductivity of foam glasses prepared from CRT panel glasscitations
- 2017The viscosity window of the silicate glass foam productioncitations
- 2017Thermal Conductivity of Foam Glasses Prepared using High Pressure Sintering
- 2017Foaming Glass Using High Pressure Sintering
- 2016Produktion af letvægtsskumglas ; Production of lightweight foam glass (invited talk)
- 2016Evaluation of Foaming Behavior of Glass Melts by High-Temperature Microscopycitations
- 2016Influence of foaming agents on both the structure and the thermal conductivity of silicate glasses
- 2014Foaming of CRT panel glass powder using Na2CO3
- 2013Insights into Reaction Mechanism of Na2CO3 in Foaming Process of Cullet Powder
- 2013Foaming of CRT panel glass powder with Na2CO3
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document
Insights into Reaction Mechanism of Na2CO3 in Foaming Process of Cullet Powder
Abstract
Soda (Na2CO3) is one of the major raw materials for producing most of the daily used glasses. It often acts as effective fluxing agent in glass melting and foaming agent for producing lightweight glass materials due to its release of CO2 at elevated temperatures. When Na2CO3 is added to a batch prior to glass melting, the resulting decomposition product Na2O has strong impact on the melt viscosity, phase separation and crystallisation behaviour, and also mechanical properties of the final glass. This is relatively well understood in literature. In contrast, when Na2CO3 is added as a foaming agent together with glass cullet powder, the impact of the resulting Na2O on the glass structure at the foaming temperatures has not been well understood. Here, we show that Na2O can be readily incorporated into the network structure of the glass phase at temperatures much lower than normal batch melting temperatures. This is verified by a sharp decrease of the glass transition temperature (Tg) of the resulting foam glass when the foaming temperature is increased from 650 to 800 °C for various contents of Na2CO3 (up to 22 wt%). Upon further raising the foaming temperature, Tg reaches a plateau for lower Na2CO3 content, whereas it slightly increases again for the higher Na2CO3 due to possible crystallization. The sharp decrease in Tg implies that Na2CO3 reacts readily with the cullet powder at rather low temperatures. The released CO2 at an optimum temperature causes ideal foaming effect in the glass, making the studied cullet powder potentially suitable for producing insulation materials. Finally, we discuss these results based on supplementary x-ray diffraction and scanning electron microscopy analyses.