Comparison Of Metallic Silicon Inclusions In Industrial Container Glass And Laboratory Melts

Metallic silicon inclusions in glasses obtained from different container glass companies and from laboratory melts by addition of metallic cuttings (aluminium, magnesium) were examined using light and scanning electron micrsocopy. The composition of the formed silicon spheres was always similar. The metallic inclusions are composed of silicon with a very small part of finely distributed iron. Im amber and green glass, chromium, manganese and copper are additionally enriched as further main elements in these alloying phases. Differences in the composition of silicon spheres are due to the dwell time and the concentration of polyvalent ions in the melt.