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- W2028909920 abstract "In this paper, an interconnecting ceramic for solid oxide fuel cells was developed, based on the modification from La{sub 0.7}Ca{sub 0.3}CrO{sub 3-{delta}} by addition of Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9}. It is found that addition of small amount Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} into La{sub 0.7}Ca{sub 0.3}CrO{sub 3-{delta}} dramatically increased the electrical conductivity. For the best system, La{sub 0.7}Ca{sub 0.3}CrO{sub 3-{delta}} + 5 wt.% Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9}, the electrical conductivity reached 687.8 S cm{sup -1} at 800 deg. C in air. In H{sub 2} at 800 deg. C, the specimen with 3 wt.% Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} had the maximal electrical conductivity of 7.1 S cm{sup -1}. With the increase of Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} content the relative density increased, reaching 98.7% when the Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} content was 10 wt.%. The average coefficient of thermal expansion at 30-1000 deg. C in air increased with Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} content, ranging from 11.12 x 10{sup -6} to 12.46 x 10{sup -6} K{sup -1}. The oxygen permeation measurement illustrated a negligible oxygen ionic conduction, indicating it is still an electronically conducting ceramic. Therefore, this material system will be a very promising interconnect for solid oxide fuel cells." @default.
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- W2028909920 date "2007-08-01" @default.
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- W2028909920 title "Novel composite interconnecting ceramics La0.7Ca0.3CrO3−δ/Ce0.8Sm0.2O1.9 for solid oxide fuel cells" @default.
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- W2028909920 doi "https://doi.org/10.1016/j.materresbull.2006.11.004" @default.
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