钙钛矿结构的LaCoO_3掺Sr后具有优异的电学性质和表面性质,如高电导率、高催化性、高氧发射性等。对于这个系列化合物可能的多种用途和作用机理的研究近年来进行得相当热烈。然而,到目前为止,人们对它们的详细结构却并不清楚。特别是因掺入三价元素Sr而引起的结构畸变、氧缺位和Co的化学价的变化等重要信息人们所知甚 The perovskite structure of LaCoO_3 doped with Sr has excellent electrical and surface properties, such as high conductivity, high catalytic, high oxygen emission and so on. Studies on the possible multiple uses and mechanism of action of this series of compounds have proceeded quite enthusiastically in recent years. However, so far the details of their structure are not clear. In particular, due to incorporation of trivalent elemental Sr-induced structural distortion, oxygen vacancies and changes in the chemical valence of Co