Specific features of the phase formation in the products of heterogeneous combustion of chromium with alkali metal perchlorates

The dependence of the lattice parameters of the chromium oxide Cr2O3 formed in a wave of heterogeneous combustion of chromium (chromium oxide) with sodium and potassium perchlorates on the initial ratio between the fuel and oxidant is established. A new cubic phase of chromium oxide with the lattice parameter close to that of the sodium superperoxide phase is found in the combustion products. The role of the gaseous components in the formation of new phases in the chromium oxide obtained by heterogeneous combustion is determined.