THE ACTIVITY OF ZINC OXIDE IN SILICATE MELTS.

摘要

Activities of ZnO in the systems ZnO-SiO(,2) and ZnO-CaO-SiO(,2) have been measured as a function of composition at 1560(DEGREES)C using a transportation technique. The activities measured in the binary system are considered in terms of various theoretical models of the thermodynamic behavior of hypothetical silicate melts. The model of ideal silicate mixing has been used for interpretation of the experimental results in the system ZnO-CaO-SiO(,2) and the observed deviations from this model are discussed in terms of the "cation accommodation" and the "preferred ionic association" effects.; Activities of ZnO have also been measured in synthetic iron blast furnace slags in the system CaO-Al(,2)O(,3)-SiO(,2)-ZnO as a function of temperature and composition.