| 高比表面积Y-掺杂二氧化铈纳米颗粒和纳米棒的制备及电学性质(英文) |
| Electrical Properties of Y-Doped Ceria Nanoparticles and Nanorods with High Specific Surface Area |
|
| 摘要: 分别通过室温老化和高温沉降热处理成功的合成了大量均匀的Y-掺杂铈纳米颗粒和纳米棒，并对Y-掺杂铈粉末中Y的含量和形态对于固体溶液性质的影响进行了研究。结果表明，Y的掺杂大大提高了铈纳米颗粒和纳米棒的比表面积，其中30%的Y-掺杂纳米颗粒的比表面积最大，可达197 m2·g-1。此外，所制备的粉末可以很容易被烧结和硬化，而相应的电解质具有良好的电学性质，其中Y0.3Ce0.7O1.85纳米颗粒电解质在850 ℃时具有最大电导率(4.32 S·m-1)和最小表观活化能(0.81 eV)。 |
| 关键词: 氧化物 纳米结构 高表面积 电学性质 |
| 基金项目: |
| Abstract: Large-scaled uniform Y-doped ceria nanoparticles and nanorods were synthesized via room-temperature aging and hydrothermal treatments of high-temperature precipitates, respectively. The influence of Y content and morphology of the Y-doped ceria powders on the solid solution properties was studied. The specific surface areas (SBET) of both the nanoparticles and nanorods were greatly enhanced by Y-doping, and the highest SBET was 197 m2·g-1 in 30 mol% Y-doped ceria nanoparticles. Moreover, the as-prepared powders could be easily sintered and densified, and the corresponding electrolyte possesses good electrical properties, Y0.3Ce0.7O1.85 nanoparticles electrolyte has a maximum total electrical conductivity (4.32 S·m-1) and minimum apparent activation energy (0.81 eV) at 850 ℃. |
| Keywords: oxide nanostructures high surface area electrical properties |
| |
| 摘要点击次数: 1876 |
| 全文下载次数: 2345 |
| 王震平,刘晓飞,李国祥,陈晓霞.高比表面积Y-掺杂二氧化铈纳米颗粒和纳米棒的制备及电学性质(英文)[J].无机化学学报,2013,29(1):206-212. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
