Abstract: Phase diagram has widely been used in the scientific researches of ceramics, materials and metallurgy, etc. But it is difficult to analysis the phase equilibrium relationship in the multicomponent system due to the lack of related theory. The mass fraction of equilibrium phase and corresponding geometric relation in the ternary system were combined together to investigate phase equilibrium relationship in the present work. The determinant method was deduced to calculate the mass fraction of equilibrium phase in the ternary system according to the Mass Conservation Law、 the Gibbs Phase Rule and the Cramer Law. It was found that, the mass fraction of equilibrium phase is equivalent to the area fraction of the relevant triangle under the three-phase equilibrium condition. Mass fraction of equilibrium phase in the CaO-SiO2-La2O3 system at 1473 K was also calculated as an example.
Authors: Chengjun Liu, Jiyu Qiu, Lifeng Sun, and Maofa Jiang
Keywords: The Lever’S Rule, CaO-SiO2-La2O3, High Temperature Equilibrium Experiment