Park, J.-S. Lee, S.-M. Kim, D.-W. Lee, J.-H. Lee, H.-W. Choi, H.-J. Kim, B.-K. 2024-01-20T23:32:44Z 2024-01-20T23:32:44Z 2021-09-02 2008-04 1229-7801 https://pubs.kist.re.kr/handle/201004/133611 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. Korean Korean Ceramic Society Activation energy Arrhenius plots Barium compounds Chemical activation Grain boundaries Proton conductivity Shells (structures) Sol-gel process Sol-gels BaCeO3 BaZrO3 Composite powders Core shell Proton-conducting oxides Sintered body Theoretical density Solid solutions Microstructures and proton conductivities of BaZrO3 modified by BaCeO3 Article 10.4191/KCERS.2008.45.4.226 1 Journal of the Korean Ceramic Society, v.45, no.4, pp.226 - 231 Journal of the Korean Ceramic Society 45 4 226 231 scopus kci ART001243803 2-s2.0-44949110043 Article Activation energy Arrhenius plots Barium compounds Chemical activation Grain boundaries Proton conductivity Shells (structures) Sol-gel process Sol-gels BaCeO3 BaZrO3 Composite powders Core shell Proton-conducting oxides Sintered body Theoretical density Solid solutions BaCeO3 BaZrO3 Core-Shell Proton conducting oxide