Journal Article

FZJ-2021-01464

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Enhancing oxygen permeation of solid-state reactive sintered Ce0.8Gd0.2O2--FeCo2O4 composite by optimizing the powder preparation method

Zeng, F. (Corresponding author)FZJ* ; Baumann, S.FZJ* ; Malzbender, J.FZJ* ; Nijmeijer, A. ; Winnubst, L. ; Guillon, O.FZJ* ; Schwaiger, R.FZJ* ; Meulenberg, W. A.FZJ*

2021
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/27471  doi:10.1016/j.memsci.2021.119248

Abstract: Dual phase membranes with mixed ionic-electronic conductivity exhibit promising properties for applications in pure oxygen separation under harsh atmospheres. The conductivity of an individual phase within dual phase membranes is often attenuated by the blocking effects from the other phase(s). Here, facile but effective ways are reported to alleviate such effects by optimizing the powder preparation method for a solid-state reactive sintering process. Powder mixtures with a nominal composition 85 wt% Ce0.8Gd0.2O2-δ:15 wt% FeCo2O4 were prepared by traditional wet ball milling method, as well as a moderate dry mixing approach. Using a modified wet ball milling procedure, homogenous powder mixtures with fine particle size are obtained and the synthesized membrane shows a fine and homogenous microstructure that realizes high oxygen permeance. Besides, a novel “dual phase” membrane having one ionic conductive monophase zone and one mixed ionic-electronic conductive multiphase zone was sintered using dry-mixed powder mixtures. With individual mesoscale percolations, two phase zones provide relatively straight paths for ionic conduction and electronic conduction, respectively, which contributes to achieving the highest oxygen permeance among all the sintered membranes.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)
2. Werkstoffstruktur und -eigenschaften (IEK-2)
3. JARA-ENERGY (JARA-ENERGY)

Research Program(s):

1. 123 - Chemische Energieträger (POF4-123) (POF4-123)

Appears in the scientific report 2021

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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