Microstructures and proton conductivities of BaZrO3 modified by BaCeO3

Jong Sung Park, Sung Myung Lee, Dong Wan Kim, Jong Ho Lee, Hae Won Lee, Heon Jin Choi, Byung Kook Kim

Research output: Contribution to journalArticle

Abstract

The dense sintered bodies with >95% theoretical densities were successfully obtained from the BaZrO3, BaCeO3, Ba(Zr 0.7Ce0.3)O3 solid solution, and core-shell structured 0.7BaZrO3-0.3BaCeO3 composite powders prepared by sol-gel methods. The activation energy of Ba(Zr0.7Ce 0.3)O3 solid solution calculated from the Arrhenius plot of the proton conductivities was similar to that of BaZrO3. The activation energy of core-shell structured 0.7BaZrO3-0.3BaCeO 3 composite, however, was much lower than that of BaZrO3 or Ba(Zr0.7Ce0.3)O3 solid solution, and was very similar to that BaCeO3. These results could be assigned to the Ce-rich grain boundary which was clearly observed by EDX in core-shell structured 0.7BaZrO3-0.3BaCeO3 composite.

Original languageEnglish
Pages (from-to)226-231
Number of pages6
JournalJournal of the Korean Ceramic Society
Volume45
Issue number4
DOIs
Publication statusPublished - 2008 Apr
Externally publishedYes

Keywords

  • BaCeO
  • BaZrO
  • Core-Shell
  • Proton conducting oxide

ASJC Scopus subject areas

  • Ceramics and Composites

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