Solid state compatibility between yttrium nickel manganite electrode and yttria-doped ceria and yttria-doped zirconia electrolytes

The solid state reaction between YNi0.33Mn0.67O3 (YNM) and Y0.18CeO2Ca0.02Ce0.80O1.89 (YCaCe) and Y2O3-fully stabilised ZrO2 (FSZ), respectively, was investigated using X-ray diffraction. The powders of both mixtures were homogenised and pressed, then cofired between 1250 and 1400 degreesC with the perspective of preparing well-developed cathode-electrolyte interfaces of solid oxide fuel cells. The YNM perovskite was found to be compatible with YCaCe up to 1400 degreesC without formation of new phases after 48 h of treatment. On the other hand, YNM reacted with FSZ above 1250 degreesC. At 1400 degreesC, YNM was fully decomposed giving free yttria and YMnO3. (C) 2001 Elsevier Science B.V. All rights reserved.