高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (12): 1918.

• 论文 • 上一篇    下一篇

钙钛矿型Sr1-xBixFeO3-y系列物的结构、电性及铁氧化态研究

倪行, 吴勇, 包建春, 杨民富   

  1. 南京师范大学化学系, 南京, 210097
  • 收稿日期:1996-01-04 出版日期:1996-12-24 发布日期:1996-12-24
  • 通讯作者: 倪行,女,58岁,副教授.
  • 作者简介:倪行,女,58岁,副教授.
  • 基金资助:

    江苏省教育委员会自然科学基金

A Studyof Structure,Electrical Property and Iron Oxidation State of Sr1-xBixFeO3-y Compounds of Perovskite Type

NI Xing, WU Yong, BAO Jian-Chun, YANG Min-Fu   

  1. Department of Chemistry, Nanjing Normal University, Nanjing, 210097
  • Received:1996-01-04 Online:1996-12-24 Published:1996-12-24

摘要: 在1100℃制备了钙钛矿型非计量系列物Sr1-xBixFeO3-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。

关键词: 非计量化合物, 钙钛矿型化合物, 半导体, 歧化现象

Abstract: Aseries of non-stoichiometric compounds, Sr1-xBixFeO3-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,IRand 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

Key words: Non-stoichiometric compound, Perovskite type compound, Semi-conductor, Disprototion reaction

TrendMD: