采用柠檬酸-硝酸盐法合成了Pr0.6-xNdxSr0.4FeO3-δ(x=0.0～0.6)系列钙钛矿型复合氧化物粉体,用XRD、FT-IR、TD-DTA、SEM等对产物的形成过程、物性及微结构进行了表征.结果表明,所合成的系列样品1200℃煅烧2h即形成立方钙钛矿结构的单相固溶体.用直流四端子法测量了烧结陶瓷体在中温(450～800℃)范围内的电导率,A位单一稀土元素的样品(x=0.0、0.6)及以Pr(x=0.1)或Nd(x=0.5)为主的稀土复合氧化物,其电导率均在150S·cm-1以上,明显高于双稀土样品(x=0.2、0.3、0.4)的数值(σ=45～80S·cm-1);x=0.2、0.3、0.4三个样品电导率较低的原因,与它们在同样烧结制度下的致密度低密切相关.该系列样品的电导率在650～700℃附近出现最大值,低温段的导电行为符合小极化子导电机制.
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