J. Phys. IV France 07 (1997) C1-185-C1-186
Gas Phase Composition over Y3Fe5O12O.Yu. Goncharov, Yu.P. Vorobiov and O.V. Carban
Physical-Technical Institute, UrB, RAS Kirov Street 132, 426000 Izhevsk, Russia
The account of the gas phase composition over Y3Fe5O12 in dependence on temperature and partial pressure of oxygen Po2 at the total pressure in system P = 105 Pa was performed with the use of the program Astra.4. Polynomials was offered for account of heats capacities Cp(T) solid solutions Ln3-cLncFe5O12 (Ln : Lanthanide Elements and Y). It is shown, that dissociation of garnet results in formation in gas phase of substances : Fe, FeO, YO2, O, O2, over 900 K and at further increase of temperature in addition will be formed : Fe+, YO YO+. The presence of FeO (that is ions Fe2+) in gas phase is one more proof of reaction :
Y3Fe5O12 → 3/2 O2 + 3 V0 + 6 Fe.
© EDP Sciences 1997