采用固相反应法合成了(Pr1-xNdx)0.6Sr0.4Co0.8Fe0.2O3-δ(x=0.2、0.4、0.6、0.8)钙钛矿氧化物系样品,采用XRD分析物相结构,采用XPS分析化学状态,用电导弛豫法研究了(Pr1-xNdx)0.6Sr0.4Co0.8Fe0.2O3-δ系样品的氧化学扩散性能.实验结果表明,(Pr1-xNdx)0.6Sr0.4Co0.8Fe0.2O3-δ体系样品的氧化学扩散系数D(chem)随温度的升高、Nd含量的增加而上升,电导率随氧分压的增大而增大;样品(Pr0.2Nd0.8)0.6Sr0.4Co0.8Fe0.2O3-δ氧扩散系数最大,在800℃时达到6.75×10-5cm2/s;样品(Pr0.2Nd0.8)0.6Sr0.4Co0.8Fe0.2O3-δ在600℃下氧分压为1.0×105Pa时电导率达到最大值为1318.138S/cm,是比较理想的固体氧化物燃料电池的阴极材料.
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