Phase Relations in the ZrO2-MgO-FeOx System: Experimental Data and Assessment of Thermodynamic Parameters

Abstract Thermodynamic parameters were assessed for the MgO–FeOx system and combined with already available descriptions of ZrO2-FeOx ZrO2-MgO systems to calculate preliminary phase diagrams planning experimental investigations. Samples selected compositions heat treated at 1523, 1673 1873 K characterized using x-ray scanning electron microscopy energy dispersive spectroscopy (SEM/EDX). Experiments indicated extension cubic ZrO2 solid solution into ternary (75 mol.% ZrO2, 10 FeOx 15 MgO) limited solubility 4 in spinel phase. Based on obtained results thermodynamic C-ZrO2 optimized.