AN ASSESSMENT OF THE ONE-BAR LIQUIDUS PHASE-RELATIONS IN THE MGO-SIO2SYSTEM

An assessment of the thermodynamic properties of the liquid phase in t he MgO-SiO2 system at one bar is performed using the calphad technique . The liquid is described using a two-sublattice ionic liquid model. T he thermodynamic data for the solid phases used are from previous eval uations considering high pressure and high temperature phase equilibri a and the available calorimetric data. With the assessed parameters, t he experimental phase relations are reproduced very well and a good ag reement is obtained with the calorimetric data on enthalpy of fusion.