Sintering And Crystallisation Behaviour Of Glass Frits Made From Silicate Wastes

Sintering and crystallisation of glass powders obtained from vitrified silicate residues are investigated. The residues considered were ashes derived from the combustion of municipal wastes, glass cullet and fledspar waste, which were mixed in different proportions to result in SiO2 contents >46wt%. By means of shrinkage, measurements using heated microscopy, sintering was found to start at about 750 deg C for all mixtures investigated and to be completed in a very short temperature interval of between 100 and 150 deg C, depending on the composition.