Thermodynamic Modeling of the CaO-SiO_2-M_2O (M=K,Na) Systems

摘要

The aim of the present study is the CALPHAD modeling of the systems CaO-SiO_2-M_2O (M=K,Na) based on a careful review of the available literature data - phase diagram and thermodynamics - as well as own experiments. The heat capacities (Cp) of three compounds, CaSiO_3, K_2Ca_2Si_2O_7 and K_8CaSi_(10)O_(25) (determined using drop calorimetry), were included in the optimization of the ternary phase diagram CaO-SiO_2-K_2O.