The Effect of Potassium Oxide K2O on the Purity of C3A

Abstract

The article is devoted to the study of the preparation and stabilization of pure cubic phase of tricalcium aluminate C₃A. The findings from the literature and several experimental trials have been summarized. Based on these findings, the synthesis of C₃A was realized, and high purity of this mineral was achieved. Furthermore, the influence of foreign ions, mainly in the form of potassium oxide K₂O combined with Na₂O in the form of sodium oxide on the crystal structure was investigated. The transformation of the cubic phase of C₃A into an orthorhombic phase was observed when the amount of these ions in the structure was changed.