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
Publication statusPublished - 2008 Apr 1
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Ceramics and Composites

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    Park, J. S., Lee, S. M., Kim, D-W., Lee, J. H., Lee, H. W., Choi, H. J., & Kim, B. K. (2008). Microstructures and proton conductivities of BaZrO3 modified by BaCeO3 Journal of the Korean Ceramic Society, 45(4), 226-231.