Thermodynamic Properties and Subphases of Wustite Field Determined by Means of Thermogravimetric Method in the Temperature Range of 1100°–1300°C

Abstract

The composition of the wustite phase field under various oxygen fugacities was determined in great detail by means of the thermogravimetric method in the temperature range of 1100°–1300°C. There is a breaking point, which means a second or possibly higher order transition in the wustite phase, in every isothermal line of oxygen fugacity vs. composition of wustite. The phase diagram containing the subphase boundary was obtained. Some thermodynamic functions were also determined and compared with the previously published data.