Physico-chemical study of Cr2O3-SiO2 system (to the problem of finding new highly refractory materials)

Abstract

The development of modern electrometallurgy raises the question of finding new highly refractory materials that increase the service life and productivity of electric furnaces. The study of the melting temperature dependence on the composition of mixtures of highly refractory materials, especially the determination of the areas of formation of solid solutions with high refractoriness, is one of the ways to find highly refractory materials. Among the existing refractories, chromium ironstone, magnesite, zirconium dioxide, etc. deserve great attention. At present there are already a number of studied systems of chromium oxide with oxides MgO, CaO, Аl₂О₃, ZrО₂. The system of Сг₂О3 — SiО₂ has not been studied yet. Its study was carried out by us in connection with the subsequent study of the ternary system Сг₂О₃ — SiО₂— ZrО₂, which is not only theoretical but also of practical interest in the search for new highly refractory materials.