Scanning Electron Microscope (SEM) in combination with EDS (Energy Dispersive Spectroscopy) was
used to investigate the morphological property of individual particles and the percentage of the elements
present. SEM image and EDS of treated BGA are given in Figure 3. BGA particles with various sizes and
geometry like prismatic, spherical and fibrous were recognized. The results of SEM with EDS suggested
prismatic particles consist mainly of Silica only. The spherical ones contain Si as well as Na, K, Al, Fe, Mg and
Ca3. The percentage of silica in the ash is 72% with some metallic impurities.