Computerized thermodynamic analysis of reactions during sintering of CaOAl<inf>2</inf>O<inf>3</inf>SiO<inf>2</inf> system

Abstract

Reactive sintering of the CaOAl2O3SiO2 system has been investigated by many authors. Babushkin (1989) referred to the forming of ternary compounds (CaO·Al2O3·2SiO2 and 2CaO· Al2O3·SiO2 as well as the binary compounds (2CaO·SiO2 and CaO·SiO2) in the temperature interval from 1000 to 1600°K, based on Gibbs free energy calculated separately for the particular chemical reaction. The aim of this paperd was to calculate the equilibrium composition of the mentioned system as a function of both initial mixture composition and sintering temperature, taking all probable reactions into consideration. Thermodynamic analysis, performed by a specially developed computer program, shows significant influence of the initial mixture composition, but slight influence of the sintering temperature. © 1991.