钙钛矿型Sr_（1－x）Bi_xFeO_（3－y）系列物的结构、电性及铁氧化态研究  

A Studyof Structure,Electrical Property and Iron Oxidation State of Sr_(1-x)Bi_xFeO_(3-y)Compounds of Perovskite Type

作　　者：倪行[1] 吴勇[1] 包建春[1] 杨民富[1] 

机构地区：[1]南京师范大学化学系

出　　处：《高等学校化学学报》1996年第12期1918-1921,共4页Chemical Journal of Chinese Universities

基　　金：江苏省教育委员会自然科学基金

摘　　要：在１１００℃制备了钙钛矿型非计量系列物Ｓｒ_（１－ｘ）Ｂｉ_ｘＦｅＯ_（３－ｙ），与文献相比，明显具有温度低、时间短、能耗少的特点。用化学分析方法测得其化学式及Ｆｅ离子的平均价态，用ＸＲＤ、交流阻抗、ＩＲ、Ｍｏｓｓｂａｕｅｒ谱等方法研究了其结构与性质，该类化合物具有Ｐｍ３ｍ对称性和半导体性质，铁离子会产生电荷歧化现象。A series of non-stoichiometric compounds’Sr_(1-x)BixFeO_(3-y) of perovskite type were synthesized at 1100 ℃ and the chemical formula and the average valence state of iron ions were determined by chemical analysis.The structure and property of the compounds were characterized by X-ray powder diffraction, alternating current ohmage,IR and Mossbauer spectroscopy.The compounds have a Pm3m symmetry and show a semiconductor property.The iron ion in the compounds underwent disproportion reaction.The synthesis was obviously performed at lower temperature,shorter reaction time and lower energy consumption conditions compared to previous literature reports

关 键 词：钙钛矿型化合物 半导体 铁系化合物 

分 类 号：O614.811[理学—无机化学]