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Synthesis and characterization of nanostructured Bi2O3-doped cerium oxides fabricated by PVA polymerization process
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Ceramics.
2008 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 34, no 8, 1949-1953 p.Article in journal (Refereed) Published
Abstract [en]

Bi2O3-doped ceria oxygen-ion conductors were prepared by a wet chemical synthesis method, which is per-formed by polymerization of polyvinyl-alcohol (PVA). The experiments showed that Bi2O3-CeO2 solid solution with 9.2 nm grains and pure fluorite type phase can be synthesized at a calcination temperature of 500 degrees C by PVA polymerization process. X-ray analysis revealed that high density narrostructured bulks could be prepared at a sintering temperature of 900 degrees C, and these bulk samples with an average grain size less than 70 nm could effectively be obtained at various heating rates during sintering. Oxygen-ion conductivity increased with the increase of dopant concentrations between 5 mol% and 15 mol% in present study.

Place, publisher, year, edition, pages
2008. Vol. 34, no 8, 1949-1953 p.
Keyword [en]
Ceria-based conductor, Bi2O3 dopant, Synthesis, PVA polymerization, process, Conductivity, ion conductor, electrolyte, fuel, ceo2
URN: urn:nbn:se:kth:diva-17953DOI: 10.1016/j.ceramint.2007.07.018ISI: 000260735500022ScopusID: 2-s2.0-53049104596OAI: diva2:335998
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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