ISOTHERMAL INVESTIGATION OF DECOMPOSITION OF FESO4-H2O-BAO2 MIXTURES

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.