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

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Proton conductivity
Solid solutions
Microstructure
Composite materials
Activation energy
Arrhenius plots
Powders
Sol-gel process
Energy dispersive spectroscopy
Grain boundaries

Keywords

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

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

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.

Microstructures and proton conductivities of BaZrO3 modified by BaCeO3 . / Park, Jong Sung; Lee, Sung Myung; Kim, Dong-Wan; Lee, Jong Ho; Lee, Hae Won; Choi, Heon Jin; Kim, Byung Kook.

In: Journal of the Korean Ceramic Society, Vol. 45, No. 4, 01.04.2008, p. 226-231.

Research output: Contribution to journalArticle

Park, JS, Lee, SM, Kim, D-W, Lee, JH, Lee, HW, Choi, HJ & Kim, BK 2008, 'Microstructures and proton conductivities of BaZrO3 modified by BaCeO3 ', Journal of the Korean Ceramic Society, vol. 45, no. 4, pp. 226-231.
Park, Jong Sung ; Lee, Sung Myung ; Kim, Dong-Wan ; Lee, Jong Ho ; Lee, Hae Won ; Choi, Heon Jin ; Kim, Byung Kook. / Microstructures and proton conductivities of BaZrO3 modified by BaCeO3 In: Journal of the Korean Ceramic Society. 2008 ; Vol. 45, No. 4. pp. 226-231.
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AU - Choi, Heon Jin

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AB - 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.

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