| Study on Agglomeration and Densification Behaviors of Gadolinium-Doped Ceria Ceramics |
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| 作者姓名： | 罗丹 骆仲泱 余春江 岑可法 |
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| 作者单位： | State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang Untversity , Hangzhou 310027, China |
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| 基金项目： | Project supported by the Key Research Program of the National Natural Science Foundation （90610035） |
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| 摘 要： | By synthesizing reactive powders via a self-sustaining combustion synthesis, the glycine-nitrate process, the gadolinium-doped celia （GDC） with the chemical formula Ce0.8Gd0.2O1.9 was prepared. The resultant powders were dispersed with the terpineol as the dispersant through different methods such as ball milling and high-shear dispersing. Coagulation factor （CF） was used to mark the degree of agglomeration on the nano-scale GDC in this work. The effect of agglomeration on the densification behavior at different sintering temperatures was investigated. The studies indicated that agglomeration retarded the densification at the sintering stage. The powders with better dispersion exhibited a higher sintered density at the same temperature. After effective dispersion treatment, GDC could be fully densified at the sintering temperature of 1300 ℃. The densification temperature was significantly lower than those reported previously. The high sintering kinetics of the ceramics was obtained based on the agglomeration control.
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| 关 键 词： | 钆 掺杂 氧化铈陶瓷 团聚 致密化 固体氧化物燃料电池 电极 |
| 文章编号： | 1002-0721（2007）02-0163-05 |
| 收稿时间： | 2006-07-18 |
| 修稿时间： | 2006-09-20 |
Study on Agglomeration and Densification Behaviors of Gadolinium-Doped Ceria Ceramics |
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| Dan , Zhongyang Luo, Chunjiang Yu,Kefa Cen.Study on Agglomeration and Densification Behaviors of Gadolinium-Doped Ceria Ceramics[J].Journal of Rare Earths,2007,25(2):163-167. |
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| Authors: | Dan Zhongyang Luo Chunjiang Yu Kefa Cen |
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| Affiliation: | aState Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | By synthesizing reactive powders via a self-sustaining combustion synthesis, the glycine-nitrate process, the gadolinium-doped ceria (GDC) with the chemical formula Ce0.8Gd0.2O1.9 was prepared. The resultant powders were dispersed with the terpineol as the dispersant through different methods such as ball milling and high-shear dispersing. Coagulation factor (CF) was used to mark the degree of agglomeration on the nano-scale GDC in this work. The effect of agglomeration on the densification behavior at different sintering temperatures was investigated. The studies indicated that agglomeration retarded the densification at the sintering stage. The powders with better dispersion exhibited a higher sintered density at the same temperature. After effective dispersion treatment, GDC could be fully densified at the sintering temperature of 1300 °C. The densification temperature was significantly lower than those reported previously. The high sintering kinetics of the ceramics was obtained based on the agglomeration control. |
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| Keywords: | gadolinium-doped ceria (GDC) agglomeration dispersion densification sintering temperature ceramics rare earths |
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