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000878726 1001_ $$0P:(DE-Juel1)173865$$aZeng, Fanlin$$b0$$eCorresponding author$$ufzj
000878726 245__ $$aPhase and microstructural characterizations for Ce0.8Gd0.2O2--FeCo2O4 dual phase oxygen transport membranes
000878726 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2020
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000878726 520__ $$aDual phase oxygen transport membranes were prepared via solid state reaction at 1200 ℃. The sintered membranes were characterized via X-ray diffraction, back scattered electron microscopy and electron backscatter diffraction, and associated with image analysis and calculations to quantify phase compositions and microstructural features including volume fractions, grain sizes, and contiguity. The characterizations reveal a multi-phase system containing Ce1-xGdxO2-δ’ (x ≈ 0.1) (CGO10), and FeyCo3-yO4 (0.2 < y < 1.2) (FCO), CoO and Gd0.85Ce0.15Fe0.75Co0.25O3 (GCFCO) in the sintered membranes. In addition, a novel model is utilized to assess the evolution of the ambipolar conductivity with respect to microstructural features. Both experimental and calculated results indicate that if the grain sizes of all phases in the composites are similar, the optimal ambipolar conductivity is reached with a volume ratio of ionic conducting phase to electronic conducting phase close to 4:1. Meanwhile, the GCFCO phase dominates the effective electronic conductivity.
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000878726 7001_ $$0P:(DE-Juel1)129755$$aMalzbender, Jürgen$$b1$$ufzj
000878726 7001_ $$0P:(DE-Juel1)129587$$aBaumann, Stefan$$b2$$ufzj
000878726 7001_ $$0P:(DE-Juel1)172056$$aKrüger, Manja$$b3$$ufzj
000878726 7001_ $$0P:(DE-HGF)0$$aWinnubst, Louis$$b4
000878726 7001_ $$0P:(DE-Juel1)161591$$aGuillon, Olivier$$b5$$ufzj
000878726 7001_ $$0P:(DE-Juel1)129637$$aMeulenberg, Wilhelm A.$$b6$$ufzj
000878726 773__ $$0PERI:(DE-600)2013983-4$$a10.1016/j.jeurceramsoc.2020.06.035$$gVol. 40, no. 15, p. 5646 - 5652$$n15$$p5646 - 5652$$tJournal of the European Ceramic Society$$v40$$x0955-2219$$y2020
000878726 8564_ $$uhttps://juser.fz-juelich.de/record/878726/files/Phase%20and%20microstructural%20characterizations%20for%20Ce0.8Gd0.2O2-%CE%B4-FeCo2O4.pdf$$yPublished on 2020-06-19. Available in OpenAccess from 2022-06-19.
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