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

对MgO–FeOx系统的热力学参数进行了评估，并与ZrO2-FeOx和ZrO2-MgO系统的现有描述相结合，以计算用于计划实验研究的初步相图。所选成分的样品在1523、1673和1873 K进行热处理，并使用X射线和扫描电子显微镜结合能量色散X射线光谱法（SEM / EDX）进行表征。实验表明，立方ZrO2固溶体在1873 K（75摩尔％ZrO2、10摩尔％FeOx和15摩尔％MgO）和三尖晶石相中的溶解度有限的情况下扩展到三元体系中。根据获得的结果，优化了C-ZrO2和尖晶石相的热力学参数。