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题名: Structure and impedance of ZrO2 doped with SC2O3 and CeO2
作者: Wang, ZW;  Cheng, MJ;  Bi, ZH;  Dong, YL;  Zhang, HM;  Zhang, J;  Feng, ZC;  Li, C
通讯作者: 程谟杰
关键词: doped ZrO2 ;  ac impedance ;  Raman spectra ;  grain boundary
刊名: MATERIALS LETTERS
发表日期: 2005-08-01
DOI: 10.1016/j.matlet.2004.07.065
卷: 59, 期:19-20, 页:2579-2582
收录类别: SCI
文章类型: Article
部门归属: 3,5
项目归属: 302,303,503
产权排名: 1;1
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Materials Science ;  Physics
英文摘要: Scandia and ceria doped zirconia samples, with 10 mol% SC2O3 and different content of CeO2, were synthesized and characterized. The XRD results depict that the sintered samples have a cubic phase structure. However, Raman spectra show that besides the main cubic phase, a secondary phase is also present in the sintered samples. The addition of CeO2 can raise the content of the cubic phase, but the minor metastable tetragonal phase (t'-phase) exists even at the CeO2 content as high as 10 mol%. The near-UV Raman spectra indicate that the deformed tetragonal structure predominates at the grain boundary. The addition of CeO2 can reduce the impurity at grain boundary, and no impurity can be found by near-UV Raman spectroscopy at the grain boundary of the samples with high CeO2 content. The impedance measurements show that with the increase of CeO2 content, the impedance of grain boundary decreases and the bulk impedance increases. The low impedance of grain boundary can be attributed to the formation of a clean grain boundary upon CeO2 doping, and the increase of the bulk impedance is due to the blocking effect of the large Ce(IV) ions. (c) 2005 Elsevier B.V All rights reserved.
关键词[WOS]: SCANDIA-STABILIZED ZIRCONIA ;  ELECTRICAL-CONDUCTIVITY ;  HYDROTHERMAL METHOD
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000230275100045
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93279
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Wang, ZW,Cheng, MJ,Bi, ZH,et al. Structure and impedance of ZrO2 doped with SC2O3 and CeO2[J]. MATERIALS LETTERS,2005,59(19-20):2579-2582.
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