采用固相反应法合成了Ln0.7Sr0.3Co0.9Cu0.1O3-δ(Ln=Pr,Nd)钙钛矿氧化物样品,通过XRD和XPS研究样品的物相结构与化学状态,用电导驰豫法研究样品的氧化学扩散系数.实验结果表明,Ln0.7Sr0.3Co0.9Cu0.1O3-δ的氧化学扩散系数随温度的升高而上升；样品Pr0.7Sr0.3Co0.9Cu0.1O3-δ氧扩散系数在800℃时达到3.97×10-5cm2·s-1,是比较理想的中温固体氧化物燃料电池阴极材料.
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