EFFECT OF IONIC-CONDUCTIVITY OF ZIRCONIA IN Ni-ZIRCONIA CERMET ANODE ON ITS PERFORMANCE

摘要

The polarization behavior of the Ni-zirconia cermets on 3 mol% yttria-doped zirconia electrolyte (3Y-electrolyte) is affected by the ionic conductivity of zirconia in the cermet. To study the cause of this effect, an experiment was carried out using the same cermets but another electrolyte: 8 mol% yttria-doped zirconia (8Y-electrolyte). The experimental results showed that there was no big difference in the polarization behavior among the cermets on 8Y-electrolyte contrary to the previous results with 3Y-electrolyte. The inconsistency between these experiments with different electrolytes suggests that the extension of the active three-phase zone into the cermet was negligible.