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低温燃烧合成氧化钆掺杂氧化铈粉体
作者:宋希文 彭军 赵永旺 安胜利 赵文广 
单位:内蒙古科技大学材料科学与工程学院 内蒙古科技大学材料科学与工程学院 内蒙古科技大学材料科学与工程学院 内蒙古科技大学材料科学与工程学院 内蒙古科技大学材料科学与工程学院 内蒙古包头014010 北京科技大学冶金与生态工程学院 北京100083  内蒙古包头014010  内蒙古包头014010  内蒙古包头014010 北京科技大学冶金与生态工程学院 北京100083  内蒙古包头014010 
关键词:低温燃烧合成  氧化钆掺杂氧化铈  纳米粉体  固体电解质 
分类号:TM910
出版年,卷(期):页码:2005,33(3):309-313
DOI:
摘要:
采用低温燃烧合成制备了Gd2O3掺杂CeO2(gadoliniadopedceria,GDC)纳米粉体。差热/热重分析结果表明,硝酸铈/柠檬酸凝胶的 点火温度约为230℃。探讨了有机还原剂、点火方式等对掺杂CeO2纳米粉体比表面积的影响。有机还原剂对粉体的比表面积有较大的影响, 当体系中同时添加柠檬酸、乙酸和乙二醇作为还原剂时,燃烧合成的CeO2粉体比表面积最大,为41.116m2/g。点火方式对粉体的比表面积影 响较小。在空气中于650℃焙烧2h后,掺杂CeO2粉体为立方萤石结构,晶胞常数为0.5430nm。
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Gd_(2)O_(3) doped CeO_(2 )(gadolinia doped ceria, GDC) nano-powder was synthesized by the low temperature combustion synthesis. Differential thermal analysis/thermogravimetry analysis results show that the igniting temperature of cerium nitrate and ethylene glycol redox mixture is about 230 ℃. The influences of organic reductive and igniting patterns on the properties of the nano-powders were investigated. The organic reductive has a significant effect on the specific surface area of the doped ceria powders. When ethylene glycol, acetic acid and ethane diacid are used simultaneously as reductive in the redox mixture, the maximum specific surface area of 41.116 m~(2)/g is obtained, while the igniting patterns have a slight effect on the specific surface area of the powder synthesized. The GDC nano-powder calcined in air at 650 ℃ for 2 h is cubic fluorite in structure and the crystal lattice constant is (0.543 0 nm).
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基金项目:
内蒙古科技厅攻关计划(20010808)资助项目。
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