Thermodynamic Properties of the CaO–AlO_1.5–CeO_1.5 System

抄録

In this study, the thermodynamic properties of the CaO–AlO_1.5–CeO_1.5 system have been investigated. The chemical compositions and crystal structures of ternary intermediate compounds in this system, which have not been fully studied before, have been clarified. In addition, the isothermal phase relationships of the CaO–AlO_1.5–CeO_1.5 system have been investigated at temperatures of 1823 K and 1873 K by using a chemical equilibrating technique. The activities of CaO, AlO_1.5, and CeO_1.5 were measured by a chemical equilibrating technique by using molten silver as a reference metal. For some measurements of AlO_1.5 activity, copper was used as an alternative reference. In addition, the molten iron composition has been calculated using the activities of each component of the CaO–AlO_1.5–CeO_1.5 system obtained in the present study.