{"title":"Effect of dopant on the thermal and electrical behavior of nanostructured ceria materials","authors":"N. Cioateră, V. Pârvulescu, A. Rolle, R. Vannier","doi":"10.1109/SMICND.2010.5650675","DOIUrl":null,"url":null,"abstract":"Nanopowders with compositions Ce<inf>0.8</inf>Gd<inf>0.2</inf>O<inf>2−δ</inf> (CG), Ce<inf>0.8</inf>Sm<inf>0.2</inf>O<inf>2−δ</inf> (CS), and Ce<inf>0.9</inf>Eu<inf>0.1</inf>O<inf>2−δ</inf> (CE) have been synthesized by a modified Pechini method. X-ray diffraction (XRD) revealed that all powders calcined at 550°C were single phase, with the cubic fluorite-type structure. The good sintering properties of the synthesized nanopowders allowed us to obtain dense ceramics (>97% theoretical density). The ionic conductivities of doped ceria ceramics were investigated as a function of temperature by using AC impedance spectroscopy in the temperature range 300–800°C. The best conductivity was evidenced for the Ce<inf>0.8</inf>Sm<inf>0.2</inf>O<inf>2−δ</inf> sample.","PeriodicalId":377326,"journal":{"name":"CAS 2010 Proceedings (International Semiconductor Conference)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"CAS 2010 Proceedings (International Semiconductor Conference)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SMICND.2010.5650675","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Nanopowders with compositions Ce0.8Gd0.2O2−δ (CG), Ce0.8Sm0.2O2−δ (CS), and Ce0.9Eu0.1O2−δ (CE) have been synthesized by a modified Pechini method. X-ray diffraction (XRD) revealed that all powders calcined at 550°C were single phase, with the cubic fluorite-type structure. The good sintering properties of the synthesized nanopowders allowed us to obtain dense ceramics (>97% theoretical density). The ionic conductivities of doped ceria ceramics were investigated as a function of temperature by using AC impedance spectroscopy in the temperature range 300–800°C. The best conductivity was evidenced for the Ce0.8Sm0.2O2−δ sample.
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