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℃.
参考文献
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