Book/Dissertation / PhD Thesis

FZJ-2021-01400

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mechanical reliability and oxygen permeationof Ce0.8Gd0.2O2-δ-FeCo2O4 dual phase membranes

Zeng, F. (Corresponding author)FZJ*

2021
Forschungszentrum Jülich GmbH Zentralbibliothek Jülich
ISBN: 978-3-95806-527-7

Please use a persistent id in citations: http://hdl.handle.net/2128/27875

Abstract: Dual phase oxygen transport membranes, consisting of ionic and electronicconducting phases, exhibit great potential in high-purity oxygen generation due totheir high stability under harsh application atmospheres. Oxygen-ion conductivefluorite oxides (e.g. Ce0.8Gd0.2O2-δ) and electron conductive spinel phases (e.g.FeCo2O4) are promising material candidates for such a dual phase oxygen transportmembrane. Mechanical properties (e.g. elastic modulus, hardness, strength andsubcritical crack growth behaviour) and oxygen permeation of the membrane areimportant parameters regarding reliability for future applications. These parametershave close relationships with composition and microstructural characteristics, likegrain size, phase distribution and defects (e.g. microcracks). However, theserelationships are currently not fully understood. Therefore, in this thesis, theinfluence of composition, grain size and microstructural defects on mechanicalproperties are investigated for Ce0.8Gd0.2O2-δ-FeCo2O4 membranes. Millingprocedures during powder fabrication and ceramic sintering profiles are optimizedto overcome the formation of unfavorable microstructural defects ...

Note: Dissertation, Univ. Twente, 2021

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Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)

Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)

Appears in the scientific report 2021

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Database coverage:
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