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

doi:10.4191/KCERS.2008.45.4.226

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 journal › Article › peer-review

Abstract

The dense sintered bodies with >95% theoretical densities were successfully obtained from the BaZrO₃, BaCeO₃, Ba(Zr _0.7Ce_0.3)O₃ solid solution, and core-shell structured 0.7BaZrO₃-0.3BaCeO₃ composite powders prepared by sol-gel methods. The activation energy of Ba(Zr_0.7Ce _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(Zr_0.7Ce_0.3)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 language	English
Pages (from-to)	226-231
Number of pages	6
Journal	Journal of the Korean Ceramic Society
Volume	45
Issue number	4
DOIs	https://doi.org/10.4191/KCERS.2008.45.4.226
Publication status	Published - 2008 Apr
Externally published	Yes

Keywords

BaCeO
BaZrO
Core-Shell
Proton conducting oxide

ASJC Scopus subject areas

Ceramics and Composites

Access to Document

10.4191/KCERS.2008.45.4.226

Cite this

@article{6fdd88067717406eb1040a4ac84283ae,

title = "Microstructures and proton conductivities of BaZrO3 modified by BaCeO3",

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.",

keywords = "BaCeO, BaZrO, Core-Shell, Proton conducting oxide",

author = "Park, {Jong Sung} and Lee, {Sung Myung} and Kim, {Dong Wan} and Lee, {Jong Ho} and Lee, {Hae Won} and Choi, {Heon Jin} and Kim, {Byung Kook}",

year = "2008",

month = apr,

doi = "10.4191/KCERS.2008.45.4.226",

language = "English",

volume = "45",

pages = "226--231",

journal = "Journal of the Korean Ceramic Society",

issn = "1229-7801",

publisher = "Korean Ceramic Society",

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TY - JOUR

T1 - Microstructures and proton conductivities of BaZrO3 modified by BaCeO3

AU - Park, Jong Sung

AU - Lee, Sung Myung

AU - Kim, Dong Wan

AU - Lee, Jong Ho

AU - Lee, Hae Won

AU - Choi, Heon Jin

AU - Kim, Byung Kook

PY - 2008/4

Y1 - 2008/4

N2 - 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.

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.

KW - BaCeO

KW - BaZrO

KW - Core-Shell

KW - Proton conducting oxide

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