Recycled soda-lime glass was successfully converted into glass foams by a particularly simple and economic processing, consisting of a direct heating of glass powders at temperatures from 900 to 1050 °C. The foaming operated by the oxidation of SiC, inserted as powder additive, was affected by a complex combination of processing temperature, soaking time, devitrification tendency and amount of MnO2, acting as oxidation promoter. A preliminary optimization of the processing parameters led to foams with a good microstructural homogeneity and mechanical strength. A following fundamental optimization was dedicated to the introduction of several waste glasses in the glass/SiC/MnO2 mixtures, aimed at modifying the glass viscosity and devitrification tendency, and led to improved foams, promising for industrial production.
Recycling of waste glasses in the manufacturing of glass foams
BERNARDO, ENRICO;SCARINCI, GIOVANNI
2009
Abstract
Recycled soda-lime glass was successfully converted into glass foams by a particularly simple and economic processing, consisting of a direct heating of glass powders at temperatures from 900 to 1050 °C. The foaming operated by the oxidation of SiC, inserted as powder additive, was affected by a complex combination of processing temperature, soaking time, devitrification tendency and amount of MnO2, acting as oxidation promoter. A preliminary optimization of the processing parameters led to foams with a good microstructural homogeneity and mechanical strength. A following fundamental optimization was dedicated to the introduction of several waste glasses in the glass/SiC/MnO2 mixtures, aimed at modifying the glass viscosity and devitrification tendency, and led to improved foams, promising for industrial production.Pubblicazioni consigliate
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