Abstract: Foam glass-ceramics were prepared by “one step” sintering method, using high titanium blast furnace slag and glass cullet as the main materials, with adding calcium carbonate as foaming agents, borax as flux-agents, and trisodium phosphate as foam stabilizers. The effects of La2O3 (0wt%-3.5wt%) on the crystalline phases, microstructure, and properties of foam glass-ceramics were studied in this research. The results showed that the crystal phase species of foam glass-ceramics barely changed with La2O3 adding, while the crystallinity increased. With La2O3 increasing from 0wt％ to 1.5wt％, the diameter of the bubble decreased. Besides the shape of crystals changed from particulate into short columned. The bulk density and compressive strength of foam glass-ceramics increased. The porosity, water absorption and thermal conductivity decreased. However, with increasing La2O3 from 1.5wt％ to 3.5wt％, the diameter of the bubble increased. The shape of crystals turned to irregular shape. The bulk density and compressive strength of foam glass-ceramics decreased, the porosity, water absorption and thermal conductivity increased. The optimum comprehensive property of foam glass-ceramics was achieved at 1.5wt％ La2O3.
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2018, Vol. 32 
