caa a22 4500 445363061 CHVBK 20180317142921.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10832-010-9627-2 doi (NATIONALLICENCE)springer-10.1007/s10832-010-9627-2 Measurement of electrical conductivity of La0.2Sr0.8Cr0.2Fe0.8O3-δ using gas-tight electrochemical cells [Elektronische Daten] [Jiho Yoo, Sangdo Kim, Hokyung Choi, Youngjoon Rhim, Jeonghwan Lim, Sihyun Lee, Allan Jacobson] The oxygen partial pressure (pO2) dependence of the electrical conductivity of La0.2Sr0.8Cr0.2Fe0.8O3-δ (LSCrF) was obtained at T = 750-1060°C and pO2 = 10−18−0.5atm. The slope of the plot of log σ vs. log pO2 is ∼1/5 in the p-type region, pO2 = 10−5−10−1 atm. The p-n transition pO2 increases with increasing temperature. The activation energy for ionic conduction was estimated to be 0.86eV from an Arrhenius plot of the minimum conductivity vs. reciprocal temperature. At temperatures below 942°C, a plateau in the conductivity isotherm suggests the presence of a two-phase region. Most likely, phase separation occurs to form a mixture of a perovskite phase and an oxygen vacancy ordered phase related to brownmillerite. Springer Science+Business Media, LLC, 2011 La0.2Sr0.8Cr0.2Fe0.8O3-δ nationallicence Perovskite nationallicence Electrical conductivity nationallicence SOFC nationallicence Yoo Jiho Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Kim Sangdo Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Choi Hokyung Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Rhim Youngjoon Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Lim Jeonghwan Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Lee Sihyun Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Jacobson Allan Department of Chemistry, University of Houston, 4800 Calhoun Rd, 77004, Houston, TX, USA aut Journal of Electroceramics Springer US; http://www.springer-ny.com 26/1-4(2011-06-01), 56-62 1385-3449 26:1-4<56 2011 26 10832 https://doi.org/10.1007/s10832-010-9627-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10832-010-9627-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yoo Jiho Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Kim Sangdo Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Choi Hokyung Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Rhim Youngjoon Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Lim Jeonghwan Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Lee Sihyun Climate Change Technology Division, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Jacobson Allan Department of Chemistry, University of Houston, 4800 Calhoun Rd, 77004, Houston, TX, USA aut NATIONALLICENCE 773 0- Journal of Electroceramics Springer US; http://www.springer-ny.com 26/1-4(2011-06-01), 56-62 1385-3449 26:1-4<56 2011 26 10832 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer