Sr_(1-x)Bi_xFeO_(3-δ)(x≤0.50)的柠檬酸盐法制备和导电性  

Preparation and Conductivity of Sr_(1-x)Bi_xFeO_(3-δ)(x≤0.5) by Citrate Methods

作　　者：郑文君[1] 赵鸿喜[1] 徐明明 彭定坤[2] 孟广耀[2] 

机构地区：[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

出　　处：《无机材料学报》2000年第3期451-455,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金!59789201

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．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℃.

关 键 词：电子混合导体 柠檬酸盐法 氧化物 电极 燃料电池 

分 类 号：TM911.405[电气工程—电力电子与电力传动] TM911.403