In this paper, to overcome the shortcomings of the conventional technologies, we attempted to utilize iron ore slag as the
ceramic glaze colorant to prepare the phase separation fancy glaze in the R2O–RO–Al2O3–SiO2–P2O5 basis system. The
crystal phase composition and microstructure, the coloring mechanism and the physical property of the phase separation
fancy glaze were investigated. This work will throw some light on the understanding of preparing phase separation fancy glaze by iron ore slag.