Analysis and prediction of acid–base reactions between oxides and oxysalts using the optical basicity concept

摘要: The chemical reactions of (i) oxides with each other, e.g. CaO SiO2, (ii) oxysalts, CaSiO3, and (iii) oxysalts Ca2SiO4 Ca3(PO4)2, have been considered from the point view acid–base theory. From known optical basicity values for alkali alkaline-earth metal also MgO, Al2O3, B2O3, P2O5, SO3, basicities were calculated a large number oxysalts. Examination existing data on these oxidic compounds at elevated temperatures, in form sub-solidus compatibility diagrams ternary systems, has revealed that generally spanned by products is less than reactants. This indicates neutralisation major driving force behind reaction; occasionally this principle violated, as when other factors such stable network structure are prime importance. It shown how analysis offers method constructing tie-lines diagrams, it suggested might be used guide checking uncertainties diagrams.