摘要
合成了多种类型的稀土复合氧化物,研究它们的结构、电学性质.通过大量实验数据,总结了电子构型、自旋状态、电子输运通道与原子簇对稀土化合物电性影响的规律 中心离子的最外层电子轨道中若有未成对电子,并未呈半充满状态时,导电性好;化合物结构中必须具有原子间距小于0.31nm的—M—X—M—X—或—M—M—M—连续输运通道,且中心离子的电子构型符合上述导电性好的条件,化合物导电性好.孤立的原子簇不能成为导电通道,因此它的存在将减少导电性能.
The rare earth complex oxides with different types have been synthesized. Their structures and electric properties have been investigated. According to our experimental results, the effects of the outest shell electronic configuration, electron spin state, electron transport path and formation of cluster on the electric properties of rare earth complex oxides have been summarized. When the electrons in the outest shell of the central metallic ion are unpair, and the outest shell is not half-filled, the electric conductibilities of these compounds are better. If there is a -M-X-M-X-or-M-M-M-(the distances between two atoms <0.31nm) continuous electron transport path, and the electron configurations of the central metallic ion conform to the above condition, then the electric conductibilities are good. The isolate cluster can not become the continuous electron transport path, therefore, the formation of the isolate cluster will reduce the conductibility.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1995年第11期1088-1092,共5页
Acta Chimica Sinica
基金
国家攀登计划资助项目
