Formation, Stability, and Crystallinity of Various Tricalcium Aluminate Polymorphs.

Tricalcium aluminate is an important phase of Portland clinker. In this paper, three polymorphs of CA were prepared by means of the solid-state synthesis method using intensive milling of the raw material mixture which was doped with various amounts of NaO and sintered at a temperature of 1300 °C for 2 h. The final products were evaluated through X-ray diffraction using Rietveld analysis.