Synthesis of nano-crystalline Gd0.1Ce0.9O2-x for IT-SOFC by aerosol flame deposition

被引：17

作者：

Im, Jong Mo ^{[1
]}

You, Hyun Jin ^{[1
]}

Yoon, Yong Sub ^{[1
]}

Shin, Dong Wook ^{[1
]}

机构：

[1] Hanyang Univ, Div Engn & Mat Sci, Seoul 133791, South Korea

来源：

CERAMICS INTERNATIONAL | 2008年 / 34卷 / 04期

关键词：

nanocomposites; CeO2; aerosol flame deposition (AFD);

D O I：

10.1016/j.ceramint.2007.09.040

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nano-sized gadolinia-doped ceria (GDC) can be used as an IT-SOFC electrolyte, oxygen gas sensor or abrasives. In this study, nano-sized GDC powders with bimodal particle distribution of about 10 nm and 200 nm particle size were successfully synthesized by aerosol flame deposition (AID). The resulting effects of sintering temperature on microstructure and electrical properties were investigated in the sintering temperature range 1100-1400 degrees C. The pellet had a completely dense microstructure after sintering at 1400 degrees C for 10 h. Raman measurement showed an increase of oxygen vacancy due to shift between reduced and oxidized states (Ce3+ <-> Ce4+) with increasing sintering temperature. The formation of oxygen vacancies noticeably increased the ionic conductivity above 1300 degrees C. (C) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：877 / 881

页数：5

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