Effect of the addition of iron oxide on the microstructure of ye'elimite

This article is devoted to the description of microstructure ye'elimite, calcium aluminates and ferritic phase when iron oxide present synthesis carried out at 1300 °C for 3 h. The incorporation in ye'elimite structure (general formula: Ca4Al(6-2x)Fe2xSO16 with x = 0.00 1.13) complete < 0.12. Beyond this composition, (CaO)2(Al2O3,Fe2O3) appears as a minor which can develop two forms: needle-like morphology melt morphology. presence favors formation an iron-rich liquid leads growth grains by material diffusion mechanisms increases conversion rate alumina phase. Also clear distinction between aluminate presented.