无机材料学报

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Sr1-xBixFeO3-δ(x≤0.50)的柠檬酸盐法制备和导电性

郑文君1; 赵鸿喜1; 徐明明2; 彭定坤2; 孟广耀2   

  1. 1. 南开大学化学系; 天津 300071; 2. 中国科学技术大学材料科学与工程系; 合肥 230026
  • 收稿日期:1999-05-28 修回日期:1999-06-30 出版日期:2000-06-20 网络出版日期:2000-06-20

Preparation and Conductivity of Sr1-xBixFeO3-δ(x≤0.5) by Citrate Methods

ZHENG Wen-Jun1; ZHAO Hong-Xi1; XU Ming-Ming2; PENG Ding-Kun2; MENG Guang-Yao2   

  1. 1.Department of Chemistry Nankai University; Tianjin 300071; China; 2.Department of MaterialsScience & Engineering; University of Science & Technology of China; Hefei 230026; China
  • Received:1999-05-28 Revised:1999-06-30 Published:2000-06-20 Online:2000-06-20

摘要: 采用柠檬酸盐法制备了Sr1-xBixFeO3-δx≤0.50)系列氧离子-电子混合导体,并采用XRD、IR、TG、DTA和交流复阻抗技术对产物进行了表征.初始凝胶经自燃和800℃下预烧,可得纯相钙钛矿产物粉体,其结构与SrFeO3相似,为正交对称性.粉体在850~900℃下烧结,可得相对烧结密度在97%以上的烧结体.Sr0.5Bi0.5FeO3-δ的电导率在400℃出现极值,约为3.6Scm-1

关键词: 氧离子-电子混合导体, 柠檬酸盐法, 钙钛矿, Sr1-xBixFeO3-δx≤0.50)

Abstract: Sr1-xBixFeO3-δ (x≤0.50) series oxide ionic/electronic conductors were prepared through citrate gel precursors. The product was characterized by means of XRD, IR, TG, DTA and ac impedance techniques. Pure perovskite-type phase was formed after the gel combusted and calcined at 800℃, and had an orthorhombic structure similar to that of SrFeO3. Although the density of the product calcined at 85O"C remained 97% theoretical value, an extreme conductivity of 3.6Scm-1 was found at 400℃.

Key words: oxide ionic/electronic conductor, citrate gel method, perovskite, Sr1-xBixFeO3-δx≤0.50)

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