Choi, Sung Min Lee, Jong-Heun Hong, Jongsup Kim, Hyounchul Yoon, Kyung Joong Kim, Byung-Kook Lee, Jong-Ho 2024-01-20T10:01:36Z 2024-01-20T10:01:36Z 2021-09-05 2014-04-24 0360-3199 https://pubs.kist.re.kr/handle/201004/126869 The phase stability and electrical conductivity of a proton-conducting oxide, Ba(Zr0.84Y0.15Cu0.01)O3-delta (BZYCu), sintered under various atmospheres was systematically investigated. The partial pressures of oxygen (Po-2) and barium (P-Ba) were used as the tunable experimental parameters to control the surrounding atmosphere during sintering. According to the analysis, the potentially volatile species BaCO3, formed by the decomposition of BZYCu under a CO2-containing atmosphere at around 600 degrees C, was found to induce barium losses by evaporation. These barium losses, and the associated Y2O3 segregation, were the decisive factor in determining the phase stability and electrical conductivity of the resulting BZYCu; both of these properties deteriorated with barium evaporation. Maintaining the optimum balance of Po-2, and P-Ba during sintering is crucial for minimizing Y2O3 segregation by kinetically suppressing the volatilization of barium. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD DOPED BARIUM ZIRCONATE CATION NONSTOICHIOMETRY FUEL-CELLS TRANSPORT BEHAVIOR Effect of sintering atmosphere on phase stability, and electrical conductivity of proton-conducting Ba(Zr0.84Y0.15Cu0.01)O3-delta Article 10.1016/j.ijhydene.2014.02.072 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.39, no.13, pp.7100 - 7108 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 39 13 7100 7108 scie scopus 000335708600031 2-s2.0-84898013534 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article DOPED BARIUM ZIRCONATE CATION NONSTOICHIOMETRY FUEL-CELLS TRANSPORT BEHAVIOR Proton-conducting oxide Barium evaporation Y2O3 segregation Phase stability Electrical conductivity