摘要
以硝酸盐为原料,乙二醇为络合剂,采用溶胶凝胶法制备了质子导体SrCe0.9Y0.1O3-δ电解质薄膜。使用TG/DSC和XRD对凝胶前驱体的热分解过程及相组成进行了表征。探讨了溶胶凝胶制备SrCe0.9Y0.1O3-δ电解质的反应过程:凝胶前驱体由C3H3CeO6和Sr(NO3)2构成;Sr(NO3)2在630℃分解,并部分生成SrCO3中间相;SrCO3在865℃分解完全,并与CeO2反应最终得到SrCeO3。900℃热处理得到的SrCe0.9Y0.1O3-δ电解质薄膜致密、均匀,无气孔和微裂纹,为钙钛矿型SrCeO3相。热力学计算表明电解质凝胶前驱体生成SrCeO3的热分解反应过程能够达到的最高理论温度为1455.4℃,高于SrCeO3生成所需温度764.6℃,在热力学上有利于SrCeO3相生成。
The proton conducting SrCe0.9Y0.1O3-δ electrolyte film was synthesized by a sol-gel method using nitrates and ethylene glycol. The thermal decomposition behavior and phases of precursor were characterized by using TG/DSC and XRD. It was found that the precursor was consisted of C3H3 CeO6 and Sr（ NO3 ）2. At 630 ℃ , Sr（ NO3 ）2 decomposed and partly formed SrCO3 with ambient CO2. SrCO3 decomposed at 865 ℃ and reacted with CeO2 to form SeCeO3 eventually. XRD result indicated that SrCe0.9Y0.1O3-δ electrolyte film annealed at 900 ℃ was perovskite SrCeO3. The film had a dense and homogeneous microstructure, and no holes or cracks was de- tected. Moreover, the reaction temperature of SrCe0.9Y0.1O3-δ precursor was determined to be 1455.4℃ by thermodynamic calculation, which was higher than the required SrCeO3 synthesis temperature of 764.6 ℃, thus in favor of the formation of SrCeO3.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2012年第6期936-941,共6页
Chinese Journal of Rare Metals
基金
国家科技部ITER"973"计划(2010GB113003)资助项目
