摘要：采用低温燃烧合成工艺合成了BaCe_0.9Nd_0.1O_3-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。

关键词：低温燃烧合成;溶胶-凝胶法;高温质子导体;

Abstract: Neodymium-doped barium cerate powder is synthesized by alow-temperature combustion synthesis technique. It is found that the ratioof citrate and NH₄NO₃ present in the initial aolutions plays an importantrole in controlling the enthalphy of the spontaneous combustion reactionas well as the gel decomposition temperature. The obtained gels are characterized by TG-DSC.The following characterization procedures includeXRD, TEM and BET. The experimental results indicate that the heatingtemperature is 800 C for obtaining the powder and the average particlesize is about 40~50 nm. It is also founded that a pure BaCe_0.9Nd_0.1O_3-δ phase with perovskite structure formed at 900 C,and it is about 700 C lowerthan the traditional solid-reaction method.So it is more practical andmore ascendant than the traditional method.

Key words: low-temperature combustion synthesis; sol-gel method; hightemperature proton conductors