应用化学 ›› 1993, Vol. 0 ›› Issue (6): 99-101.

• 研究简报 • 上一篇    下一篇

La1-xMxFeyCo1-yO3型复合氧化物(M=Sr,Ba)的合成、结构及电性能

张源魁, 任玉芳   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室 130022 长春
  • 收稿日期:1992-11-26 修回日期:1993-04-26 出版日期:1993-12-10 发布日期:1993-12-10
  • 基金资助:
    国家科委;国家自然科学基金资助项目

PREPARATION,STRUCTURE AND ELECTRIC PROPERTY OF La1-xMxFeyCo1-yO3(M=Sr,Ba)

Zhang Yuankui, Ren Yufang   

  1. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1992-11-26 Revised:1993-04-26 Published:1993-12-10 Online:1993-12-10

摘要: 钙钛矿型的稀土与过渡金属复合氧化物(ABO3)及部分稀土为碱土金属置换的A1-xMxBO3型复合物在最近20年来研究较多,并在催化气敏,超导等方面取得了良好进展。但对A1-xMxB1-yNyO3型复合物却研究甚少。本文合成了一系列的La1-xMxFeyCo1-yO3(M=Sr或Ba)钙钛矿型复合氧化物,研究了它们组成与电性的变化规律。

关键词: 稀土复合氧化物, 铁钴复合氧化物, 电学性质

Abstract: La1-xMxFeyCo1-yO3(M=Sr,Ba,x=0.1~0.9,y=0.1~0.9) have been prepared. The crystal of La0.7Sr0.3FeyCo1-yO3(y=0.1,0.3) is rbombohedral. The crystal of other compounds is cubic. The lattice parameters of La1-xMxFeyCo1-yO3 increase with increasing the yvalue. The lattice parameters of La1-xSrxFe0.7Co0.3O3 decrease with the increase of the x value, but that of La1-xBaxFe0.7Co0.3O3 increase with the increase of the x value. All the compounds are semiconductors. Their resistivities increase with increasing the y value when x=0.3; decrease with increasing the x value when y=0.7 and x=0.1~0.5; and increase with increasing the x value when y=0.7 and x=0.5~0.9.

Key words: rare earth complex oxide, iron oxide, cobalt oxide, electric property