Enhanced sinterability of BaZr sub(0.1Ce) sub(0).7Y sub(0.1Yb) sub(0).1O sub(3-[delta] by addition of nickel oxide)

The effect of nickel oxide addition on the sintering behavior and electrical properties of BaZr sub(0.1Ce) sub(0).7Y sub(0.1Yb) sub(0).1O sub(3-[delta] (BZCYYb) as an electrolyte for solid oxide fuel cells was systematically studied. Results suggest that the addition of a small amount ([approx]1 wt%) of NiO to BZCYYb greatly promoted densification, achieving [approx]96% of the theoretical density after sintering at 1350 degree C in air for 3 h (reducing the sintering temperature by [approx]200 degree C). Further, a sample sintered at 1450 degree C for 3 h showed high open circuit voltages (OCVs) when used as the electrolyte membrane to separate the two electrodes under typical SOFC operating conditions, indicating that the electrical conductivity of the electrical conductivity of the BZCYYb was not adversely affected by the addition of [approx]1 wt% NiO.)