The feasibility and features of the production of foamed glass ceramic materials based on oil shale ash were investigated. The optimal regime of synthesis found involved the following steps: glass fusion at 1400 deg C, preparation of the glass powders and blending with the foaming agent. The foaming was carried out at 900-920 deg C with a further one stage crystallisation at 790-820 deg C. It was noted that the admixture of calcium carbonate, as a foaming agent, changed the phase composition of the resulting glass ceramics by an increased rate of the crystallisation process and the intensive formation of gehlenite simultaneously with diopside.
Origin
Unknown
Journal Title
Glass Sci Technol 75 5 2002 259-262
Sector
Glass Ceramics
Class
GC 555