节点文献
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
【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℃.
【关键词】 氧离子-电子混合导体;
柠檬酸盐法;
钙钛矿;
Sr1-xBixFeO3-δ(x≤0.50);
【Key words】 oxide ionic/electronic conductor; citrate gel method; perovskite; Sr1-xBixFeO3-δ(x≤0.50);
【Key words】 oxide ionic/electronic conductor; citrate gel method; perovskite; Sr1-xBixFeO3-δ(x≤0.50);
【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