Samples of fly ash from Spanish thermal power plants were vitrified after mixing with other inorganic wastes such as dolomite slag and glass cullet. The relative viscosity and crystallisation behaviour of the glasses obtained were investigated by hot stage microscopy (HSM) and differential thermal analysis, from which reheating schedules were chosen for recrystallisation. X-ray diffraction analysis (XRD) showed that diopside (augite) and/or wollastonite could be crystallised from these glasses, giving rise to dendritic and/or acicular microstructures which were observed and analysed by scanning electron microscopy (SEM/EDX).
Origin
University Of Modena, Italy
Journal Title
Glass Tech 38 5 1997 165-170
Sector
Glass Ceramics
Class
GC 289