【摘要】 采用低温燃烧合成工艺合成了BaCe0.9Nd0.1O3-δ固体电解质。研究发现,初始溶液中柠檬酸和硝酸铵的比率对自燃反应的燃烧焓以及凝胶的分解温度有着重要影响。利用TG-DSC,XRD,TEM和BET对制备的粉体表征。实验结果表明,在800℃得到的粉体平均粒径为40～50nm左右。在900℃基本形成钙钛矿相,比传统固相反应法要低700℃以上。更多还原

【Abstract】 Neodymium-doped barium cerate powder is synthesized by a low-temperature combustion synthesis technique. It is found that the ratio of citrate and NH4NO3 present in the initial aolutions plays an important role in controlling the enthalphy of the spontaneous combustion reaction as well as the gel decomposition temperature. The obtained gels are chara-cterized by TG-DSC. The following characterization procedures include XRD, TEM and BET. The experimental results indicate that the heating temperature is 800 ℃ for obtaining the powder and the average particle size is about 40～50 nm. It is also founded that a pure BaCe0.9Nd0.1O3-δ phase with perovskite structure formed at 900 ℃, and it is about 700 ℃ lower than the traditional solid-reaction method. So it is more practical and more ascendant than the traditional method.更多还原