3680. WHITE, J. Equilibrium at High Temperatures in Systems Containing Iron Oxides. Iron and Steel Inst. (London), Carnegie Schol. Mem., vol. 27, 1938, pp. 1-75; Chem. Abs., vol. 33, 1939, p. 4496.
Dissociation of Fe2O3 into O2 and other Fe oxides was studied up to 1,650° under O2 pressures 2-76 mm. Hg. The reaction was followed by measuring the change in O2 pressure in a sealed tube, by air quenching from the equilibrium temperature and determining the weight loss, or by measuring the weight change with a special balance while the sample was at high temperature. Dissociation increases with rising temperature and decreasing O2 pressure. Addition of lime increases dissociation and addition of silica decreases it. In mixtures each acts independently of the other. Equilibrium constants were calculated and dissociation calculated from them was found to be in approximate agreement with the observed dissociation. Additional work was done on the mutual solid solubility of Fe2O3 and Fe3O4. 23 refs.
WHITE, R. R. See abs. 13, 258.
WHITE, T. A. See abs. 199, 200.