中文摘要：

以La（NO3）3·nH2O、Pr（NO3）3·6H2O、Ni（NO3）3·6H2O为原料，丙氨酸为分散剂，采用低温燃烧法合成了（x=0．1～0．9）系列钙钛矿型复合氧化物。用TGDSC、XRD、TPR、SEM等表征手段对样品进行表征。结果表明，La0.5Pr0.5NiO3在650℃开始形成稳定的钙钛矿结构，焙烧800℃时，表面晶粒均匀；随着Pr的取代度增大，Pr离子未能完全进入LaNiO3晶格中A位，以氧化物的形式存在于钙钛矿晶体表面，同时La1-xPrxNiO3表面存在两种不同活性的氧物种，缺陷氧结构数量随着取代度的增大而增大。

英文摘要：

（x= 0. 1- 0. 9） series of perovskite-type oxides is synthesized by using La（NO3 ）a · nH2O, Pr （NO3）3·6H2O, Ni（NO3 ）3 ·6H2O as raw materials, alanine as dispersing agent, low temperature combustion method. The samples is characterized by TG-DSC, XRD, TPR, SEM. The results show that the surface grains are even at 800℃, La0.5 Pr0.5NiO3 began to form the stabilization of the perovskite structure at 650℃; with the substitution degree of Pr increase, Pr ion fail to enter fully, the A site of LaNiO3 lattice exist on perovskite crystals surface as the form of oxide, there are two kinds of oxygen species with different activity in Lal ,Pr, NiOa, the degree of substitution increases, the number of defect oxygen structure increases.