Effects of the bulk Fe2O3 concentration on the controlled solidification of "Fe2O3"-CaO-SiO2 liquids in air

The solidification of "FeO"-CaO-SiO liquids in air at a controlled cooling rate of 2.0 K/s for a range of FeO concentrations in the bulk has been investigated. The compositions investigated were selected such that the bulk compositions were within the hematite primary phase field and had a CaO/SiO ratio of 3.46 wt/wt. Non-equilibrium phase assemblages were formed for all bulk compositions investigated. Specifically, the silico ferrite of calcium (SFC) phase was not formed on cooling. The microstructures and proportions of the phase assemblages formed were found to vary with the FeO concentration in the bulk