| Sintering of Ce（0.8）Sm（0.2）O（1.9） |
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| 引用本文： | 高瑞峰 毛宗强. Sintering of Ce（0.8）Sm（0.2）O（1.9）[J]. 中国稀土学报(英文版), 2007, 25(3): 364-367. DOI: 10.1016/S1002-0721(07)60437-2 |
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| 作者姓名： | 高瑞峰 毛宗强 |
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| 作者单位： | Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （20576063） |
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| 摘 要： | Ce0.8Sm0.2O1.9（SDC）powder was prepared with an oxalate coprecipitation route.SDC solid solutions were sintered at various temperatures ranging from 1100~1450 ℃,and characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,density measurements,and electrical conductivity measurements.The optimized processing parameters for densification were to uniaxially press the sample at 200~400 MPa and sinter it at 1350~1400 ℃ for 4 h.The density of the sintered pellets was 〉90% of the theoretical density;their soakage was 〈0.5%;and the average grain size was 1~2 μm.The conductivities of the typical sintered specimen were 0.0133 and 0.0211 S·cm-1 at 550 and 600 ℃,respectively;Its activation energy for ionic conductivity was 0.62 eV.The dense SDC bulk material could be used as the electrolyte layer of low temperature solid oxide fuel cells.
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| 关 键 词： | 二氧化铈 导体 化学电源 固体 |
| 文章编号： | 1002-0721（2007）03-0364-04 |
| 收稿时间： | 2006-11-03 |
| 修稿时间： | 2006-11-032006-12-20 |
Sintering of Ce0.8Sm0.2O1.9 |
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| Gao ,Mao Zongqiang,. Sintering of Ce0.8Sm0.2O1.9[J]. Journal of Rare Earths, 2007, 25(3): 364-367. DOI: 10.1016/S1002-0721(07)60437-2 |
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| Authors: | Gao Mao Zongqiang |
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| Affiliation: | Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
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| Abstract: | Ce0.8Sm0.2O1.9 (SDC) powder was prepared with an oxalate coprecipitation route. SDC solid solutions were sintered at various temperatures ranging from 1100  1450 °C, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), density measurements, and electrical conductivity measurements. The optimized processing parameters for densification were to uniaxially press the sample at 200 400 MPa and sinter it at 1350 1400 °C for 4 h. The density of the sintered pellets was > 90% of the theoretical density; their soakage was <0.5%; and the average grain size was 1 2 μm. The conductivities of the typical sintered specimen were 0.0133 and 0.0211 S ˙ cm−1 at 550 and 600 °C, respectively; Its activation energy for ionic conductivity was 0.62 eV. The dense SDC bulk material could be used as the electrolyte layer of low temperature solid oxide fuel cells. |
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| Keywords: | Sm doped ceria coprecipitation oxygen ion conductor sintering solid oxide fuel cell rare earths |
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