Isothermal studies were conducted on mixtures of Fe2SO4 . H2O in BaO2
in molar ratios of n = 4, 2 and I at temperatures of 573 and 1073 K, i
n a closed crucible, in air as gas medium. The solid products of decom
position were investigated by means of X-ray analysis, Mossbauer spect
roscopy and electron spectroscopy. The experiments revealed that the m
echanism of the process is connected with the formation of different q
uantities of barium ferrites (BaFeO3, BaFe2O4 and BaFe12O19), as well
as BaSO4 and Fe2O3, depending on the quantity of BaO2 in the initial m
ixture, the partial pressure of the gas components and temperature. Di
fferences were found in the mechanism of the process for the same mixt
ures under dynamic temperature conditions.