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Sr1-xBixFeO3-δ(x≤0.50)的柠檬酸盐法制备和导电性

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

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【作者】 郑文君赵鸿喜徐明明彭定坤孟广耀

【Author】 ZHENG Wen-Jun; ZHAO Hong-Xi; XU Ming-Ming; PENG Ding-Kun; MENG Guang-Yao(Department of Chemistry Nankai University, Tianjin 300071, China; Department of MaterialsScience & Engineering, University of Science & Technology of China, Hefei 230026, China)

【机构】 南开大学化学系!天津300071中国科学技术大学材料科学与工程系!合肥230026

【摘要】 采用柠檬酸盐法制备了Sr1-xBixFeO3-δ(x≤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.

【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℃.

【基金】 国家自然科学基金!59789201
  • 【文献出处】 无机材料学报 ,JOURNAL OF INORGANIC MATERIALS , 编辑部邮箱 ,2000年03期
  • 【分类号】O614.2
  • 【被引频次】7
  • 【下载频次】73
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