TY  - THES
AU  - Zeng, Fanlin
TI  - Mechanical reliability and oxygen permeationof Ce0.8Gd0.2O2-δ-FeCo2O4 dual phase membranes
VL  - 529
PB  - Univ. Twente
VL  - Dissertation
CY  - Jülich
M1  - FZJ-2021-01400
SN  - 978-3-95806-527-7
T2  - Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment
SP  - IV, VI, 222
PY  - 2021
N1  - Dissertation, Univ. Twente, 2021
AB  - 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 ...
LB  - PUB:(DE-HGF)3 ; PUB:(DE-HGF)11
UR  - https://juser.fz-juelich.de/record/891152
ER  -