Solid State Ionics, Vol.90, No.1-4, 75-81, 1996
Temporary Phase Segregation Processes During the Oxidation of (Fe0.7Mn0.3)(0.99)O in N-2-H2O Atmosphere
A two-step thermochemical cycle with the ternary metal oxide system (Fe1-xMnx)(3)O-4/(Fe-1-x,Mn-x)(1-y)O is applied to convert solar energy to chemical energy. Experimental investigations on the water splitting reaction of (Fe1-xMnx)(1-y)O revealed temporary formation of a manganese rich rock salt phase and an iron rich spinel phase due to phase segregation processes.